Bulletin of the United States Fish Commission

THE POLYCH/E fOUS ANNELIDS OF PORK) RICO.

BY

AARON ^L. TREADWELL,

ProfessorofBiology, VassarCollege.

181

THE POLYCHAETOUS ANNELIDS OF PORTO RICO.

By AARON

L.

TREADWELL,

Professorof Biology, VassarCollege.

The material here described was

collected

by the expedition

sent to

Porto Rico

in

the winter

of

1898-99, by Hon. George M. Bowers, United

States

Commissioner

of

Fish and

Fisheries.

The

collection

included 85

species

of

Polychsetes, of

which

32, so far as 1

could determine, are new. All observations were made on preserved

material.

Where no other preserving

fluid is

indicated

in

descriptions

of color, etc., it will

be understood

that

the specimen was

in alcohol. If

formalin was

used, that factis

noted

in the description.

For

assistance in

procuring

literatureI

am indebted

to

Dr. H. M. Smith,

of

the United

States

Commission

of

Fish and

Fisheries,

Prof. H.

C.

Bumpus,

of

Brown

University, and Prof. H.

P.

Johnson,

of

the University

of California.

All

the figures in the

text were drawn by the author.

Family SYLLIDfit.

SYLLISSav.

Syllis

spongiphila

Verrill.

SyllisspongiphilaVerrill,Trans.Conn.Acad.,vol.4,pi.24, figs. 10,10a, 1881:Kept.U.S.F. C.for1888, pi. 42,figs.183,183a;

Proc.IT. S.Nat.Mns.1885, p. 435.

ProfessorVerrilldescribesthecolor as yellowish white.

He

does not sayifthatisthecase inthe livinganimal.

Most

ofthese agreewithhisdescription,butin

some

the anterior portion ofthe

body

was^coloredadark

brown by two

ratherbroad

brown

bandsineachseg-

ment. In the intersegmental constrictions is a narrower band,

more

sharply defined

and

denserin color.

The

eyes are farther

removed

from the baseof themiddle antennain these than inthose figured

by

Verrill andthe terminaljoint ofthesetahas

more numerous

teeth.

Collectedfrom

Boqueron

Bay, station 6065, Arroyo, Puerto Real, on corals atMayaguez.

Syllis

eomplanata,

n.sp.

Body

very

much

flattened,with

row

^ofdark-brownspotsaroundpos- terioredgeofheadandacrossposteriorportion ofeach segment. Similar spots scatteredirregularlyoverrest ofbody. Tentacles

and

all cirriarticu- lated,with

row

of pigment granules around eachannulus.

Median

ten- taclelongerthanlateral,aboutfourtimesaslongashead.

Two

tentacular cirri, dorsalone rather longerthan

median

tentacle,ventral oneshorter.

Palps thick at base, tapering torounded apex. Eyes four,anterior pair thelarger.

Arrangement

ofpigment suchas togive theappearanceof a deepcleftonposteriormarginofhead. (Fig._1.)

Parapodium

uniramous,

withseveralstoutaciculae. Setae few,

compound,

withlongterminal articles; latterwithstout subter- minaltooth

and row

of smaller teethbehind it.

No

tooth inpharynx.

The

specimen, from Ponce, wasnot complete; about150segmentspresent. Length, 44

mm.;

width, 2

mm.

Fig.1. HeadofS. complcmata x3G. Right pairedantenna removedtoshowthepalp.

183

184 BULLETIN OE THE UNITED ^STATES FISH COMMISSION.

Family

HES10NID£.

HESIONE

^Sav.

Hesione proctochona Schm.

IlesioneproctochonaSchmarda, NeueWirbelloseThiere,1861, p.79,pi. 28,^fig.22G.

Fallaciaproctochona Webster, Annelids fromBermuda,Bull. U.S.F. C.188-1,p. 311, pi.S,fig.21.

HesionevittigeraEhlers,Annelidsofthe Blake, Stem. Mus.Comp.Zool.,Cambridge,1887, p. 143, pi.41, figs.1-4.

HesioneprsetextaEhlers,ibid, p. 147, pi.41, figs. 5, 6.

AccordingtoSchmarda’s originaldescription, the anterior portionofH.proctochonaischaracter- ized

by

theabsenceofantennae,the presenceof eight pairs of tentacularcirri,

and

foureyes. There aresixteen setigerous segments,and the anus is surrounded

by

a funnel-likeexpansion,

whose

edges areprolongedintoten conicalprojections.

He

also describes,but does notfigure,

two

long analcirri.

Dorsal surfacebrown, eachsegmentdividedintotenbands

by

transversewhitelines.

Between

every

two

^oftheselinesisabroaderwhite band.

A

small

knob

oneitherside,infront ofeach parapodium.

Webster(loc. cit.₎describes from

Bermuda

specimens

which

he identitiesas this species.

To

Sehmarda’sdescription

he

adds the following points: There are twovery minuteantennae, so small as toescape detectionwitha

hand

lens; each

parapodium

bears on itsouter, upper angle a slender, lip-like projection, andthe ante-analsegment has

no

setae, butbears

two

verylongcirri.

Ehlers(loc.cit.

)compareshis

new

species,H.vittigera

,

with11.proctochona.

As

betweenII.vittigera

and

II.proctochona., as described

by

Schmarda, theagreements

and

differences areas follows: Both have16 tentacularcirriand4eyes; neitherhas tentacles. (NoteWebster’s discovery of tentacles in II.proctochona.) II.vittigera has 15setigeroussegments, H.proctochonahas16; the ante-anal segment- in the former haslong cirri, whilein thelatterit is setigerous. (Note, again, Webster’s description of this segment in

H.

proctochona,

which

removes this distinction.) Ehlers’s pi. 41, fig. 1, shows unmistakably16 bundles of setae,

which

leadstothe suggestion that possibly there might have been anerrorinthedescription. It seems probable thatthe

two may

agree in this respect. H.vittigera

has

two

unequal, lip-like projections on the dorsal surface of the parapodium,

which

are absentin II.proctochona. (Note, again, Webster’s description of one such lip in the latter.) There are

no

conicalprojectionssurroundingthe analopeninginII.vittigera,asdescribedforII.proctochona.

The

PortoRicocollectioncontained alarge

number

of specimens of this genus,

which show

so

many

resemblancestoboththeabovespeciesthatitisverydoubtfulifthetwo^aredistinct.

Number

of setigerous segments, 16. There are eightpairs of tentacular cirri, four eyes,

and

two veryrudi-

mentary

antennae, visibleonly on verycareful examination. Dorsal surface

marked

withtransverse

brown

lines, leavinga broader white

band

atanterior end of each segment.

The

outer angleof the

parapodium

bears

two

shortlips. These

may

benearly equal in size, orone

may

be verysmall and easilyoverlooked.

The

ante-analsegmentbearsnoset®, but

two

longcirri. In favorablespecimens theedgeof the anal funnelisseentobe

drawn

outintoconical processes,though the structureswere

lostin

most

of the specimens.

The

PortoRico specimens agreewith II.proctochonain the

number

of setigerous segments, in the possessionof rudimentaryantennae,

and

inhaving lobesonthe anal funnel.

They

agreewithII.

vittigera inhavingtwolobestothe dorsal parapodial lip, the smallerbeingfrequentlyverysmall. In

allother respects they agree with both species. Since, except in the first of the above-described features,thedifferences are points which might easily escape detection, I

am

convinced that the sjpeciesareidentical,

and

haveincludedallofthePortoRicospecimensof IlesioneunderthespeciesII.

proctochona.

Under

the

name

H.prsetexta,Ehlersdescribesanotherspecies differingfromII.vittigera,inhaving longitudinalinsteadof transverse

brown

marking,

and

in having but a single dorsal lipto the para- podium.

Two

specimens from Porto Rico

show

these longitudinalmarkings,butagreeⁱⁿthe structure of theirparapodia withII. vittigera. Elderssuggeststhatthe differencesbetweenII.vittigera

and

^II.

prsetextaaremerelysexual. Thissuggestionisprobablycorrect.

Collected from Arroyo, Mayaguez, Hucares,

Boqueron

Bay, Playa de Ponce reef,

Ensenada Honda

(Culebra), Guanica Bay, Fajardo, Puerto Real, Porto Rico, Ponce, stations 6072,6080, 6092, 6096, 6098.

The

lastspecimenhadfifteensetigeroussegments

and

themarkingsof II.prsetexta.

THE POLY CHA3TOUS ANNELIDS OF PORTO RICO. 185

PODARKE

Ehlers.

Podarke

agilis Ehlers.

PodarkeagilisEhlers,DieBorstenwiirmer,p. 197, pi.8, figs.9-11.

A

single specimen I have referred, rather doubtfully, to this species.

The

anterior

end was

mutilated,so that it was impossible to

compare

the cirri with Ehlers’s description.

The median

antenna is proportionatelylonger than in Ehlers’s-description, and the

number

of

body

segments greater. Collectedfrom PuertoReal.

CASTALIA

Sars.

Castalia longicirrata, n. sp.

Head

roughly shield-shaped, its posterior end prolonged into

two

diverging processes. (See

fig.2.) Antennaedelicate,atriflelongerthanpalps. Palps2-jointed,terminaljoint conical,narrower thanbasal.

When

proboscisisprotrudedtheheadabutson

aconicalprocessborne ondorsal surfaceofproboscis,

which

looks, in surface view, like a verythick

median

antenna.

(Fig. 2,pr.).

Four

eyes, the anterior nearly twice as large as posterior,

body

of19segments. Anteriorly, dorsal

ramus

of parapodium not

more

than one-third the length of ventral and

much

narrower.

Toward

the posterior end the ventral rami increase very

much

in thickness

and

the differencebetween thetwo is

more

pronounced.

Each

has astout,black aciculum. Setae ofventralbundle

compound.

(Fig.3.) Thoseofdorsalbundlelong, acicular,transversely striated, minutely serrated near the end.

The

eighteenth segment without parapodia, but, I think, with cirri.

The

posterior

end

was ^oo badly mutilated to determine this point with certainty.

Two

anal cirri. Ventral cirrus reaching

beyond

tip of parapodium. Dorsal cirrus very long, inlengthequaling fourtimes thediameterofthe body.

Color pale yellow,with

marked

iridescence.

An

indicationoftransversemarkingscouldbeseen onmostofthesegments, lookingasifthecolor originallypresent

had

been

removed by

thealcohol.

Collectedfromstation 6079.

Castalia mutilata, n. sp.

Head much

broader than long, with anteriorly a

median “tongue” marked

off

by two

very indistinctlines. (See fig. 4.)

With

high

power

two very delicatepro-

cesses

may

be seen at anterior edge (fig. 4, ant?); these I interpret as rudimentary antenna*. Palps2-jointed, terminal joint

much

longerthan basal. Eyes ^four,the anterior considerably larger than posterior pair.

Six pairsof tentacular cirri.

Body

of 53 segments, broadest anteriorly, and narrowinggraduallytowardposterior end. Length, 17

mm.

Greatest width, 1.5

mm.

Parapodium

uniramous, with long conical anterior fip

and

shorter

and more

rounded posterior one. Seta- in

two

bundles,all

compound,

terminal ^{article of}

most

ventrally-placed seta- considerably shorterthan those^of dorsalones.

A

delicateventralcirrusissituatedabout a quarter of the lengthof parapodium from its end

and

reachestotheendof the posteriorlip.

The

dorsal cirrus isvery

much

stouter, placed nearer the

body.

The

terminalarticles ofallthe dorsalcirri

and

anal cirri

had

been broken away.

CollectedfromSan Antoniobridge, San Juan.

I have identified these last

two

specimens as belonging to the genus Castalia from Ehler’s diagnosis, DieBorstenwiirmer,p. 187.

Fig.4.

—

Headol Castalia muti- lata, x 26, ant?, antennae;

pip,palps.

1

86 BULLETIN OF THE UNITED STATES FISH COMMISSION.

Family

POLYNOIBjE.

Inthe following descriptionsI have followed Johnson’s (Proe. Calif. Acad. Science, vol. 1, No.

5, ^)>. 165) diagnosisofthegeneraPolynoe

and

Harmothoe.

HARMOTHOE

Kinberg.

Harmothoe

polytricha Sehmarda.

Polynoepolytricha Sclimarda,NeueWirbelloseThiere,i,xr,p. 156. Ehlers,Annelidsofthe Blake,p. 19; pi.10, figs. 9,1th pi. 11, fig. 1.

A number

of

much

mutilated specimens, comprising onlyafewof the most anterior segments

and

destitute ofelytra

and

dorsalcirri.

From

theformof the head, parapodia,

and

tentacles, I have identified

them

withthis species. Ehlersfiguresonly

two

eyes. Thesehave,in addition,

two

lateral eyes

much

largerthantheothers,and ontheside ofthehead,

where

theymighteasilybeoverlooked.

Collectedfromstations 6079, 609], 6070,

and Mayaguez

Harbor.

POLYNOE

Sav.

Polynoe

brevisetosa Kinberg.

PolynoebrevisetosaJohnson,Proc.Calif.Acad.Sci.,vol.1,No.5,p. 1C7;pi.6, fig.21; pi.7,figs. SI, 40,40a;pi.8,figs.46,40a.

Forreferencesto earlier literatureseep. 167ofJohnson’spaper.

Collectedfrom PuertoReal, Porto Rico, CaballoBlancoReef,

and

Cuanica Bay.

Polynoe

branchiala, n. sp.

Head

roughlyhexagonal (seefig.5) withanterior eyes at outer angles. Basaljoint of antenna extendingalittle

beyond

thatoftentacles. Terminaljoint of antennae reaching considerably

beyond

tentacles. Antennas

and

tentacles

brown

foroverhalf theirlength,thenawhite band, thenasecond

brown

band, immediatelyunder the white, swollen end.

A

delicate acute ^tipterminates antennas, tentacles,

and

allcirri. Peristomialcirrishapedlike tentacles, with

two brown

bands, oneabouthalf

way

along their terminal joint,the other just beneath the swollen tip. Dorsal

and

analcirri like peristomial,butwithonlyone

brown

band. Palpslong, conical, covered withfine,hair-likepapillae.

Twelve

pairs of elytra. Surfaceof elytra.coveredwith minutetubercles,witha

number

ofsofter, larger, papillaenearoutermargin. Lateral andposteriormargin denselyfringed, withalongertufta littleto one side of

median

planeof

body

on

many

of elytra. Elytra completely cover the body, and the tubercles

and

filaments give it an appearance of being covered with finegraysand.

Parapodium

withdorsalbundle of rather longsetae, toothed

on

both edges,

and

a ventralbundle ^of very stout, dark-brown setae (see fig. 6).

Each

of the latter ends in a blunt point

and

carries at alittle distance fromitsenda transverse

row

ofsharp teeth.

One

or

two

of these are

much

stouter than the rest (fig. _7)..

Dorsally eitheran elytrophore or a verylong dorsalcirrus (fig.6). Ven-

trallya long

narrow

cirrus.

Between

eachpairof parapodia, fastenedtoanterior wallofparapodium, to

body

wall,

and

a few to posterior wall of anterior parapodium are a

number

(ten or more) of finger-shaped processes (gills). (See fig. 6, hr.) These appear first between the third

and

fourth setigerous segments

and

are found throughout the greater part of body. Proboscissmooth with a row of dorsal

and

ventralpapillsearounddistalopening.

Length, 25

mm.

; width, 8

mm.

Another specimen: Length,20

mm.;

width, 6

mm.

CollectedfromBoqueron Bay, Ponce, station 6065.

Figs. 5-7.

—

^Polynoebranchiala. Fig.5,Head, x^9. Fig.6,Parapodium, x16;

br,branchial. Fig.7, Ventralseta,x90.

THE PQLYCH2ET0US ANNELIDS OF PORTO RIOO. 187 Polynoe nodosa,

n. sp.

Body

plump, with short parapodia.

The

specimens with elytra

removed

arecoiled,

and

look not unlike the larva^of a coleopterous insect. General

body

color gray, with dark longitudinal dorsal band. Inoneof thetwo specimensat

my

disposal thisisduetocolorof

body

wall; intheother, to the color of minute ^tubercles

which

cover ^it.

Whole

dorsal surface, evenof parapodium, studded with small round tubercles.

No

tubercles ventrally, but surface is studded with fine papillae, giving itavillous appearance.

Head

withlateral edges rounded. Breadth about equal todistance from posterior margin to baseof antennae. Anterior eyes larger than posterior

and

situated

more

towardside of head. Antennaelonger thanhead, withterminal swelling

and

acute tip. Tip of ter-

minalswelling

and

subterminal

band

white; therest brown. Tentaclesnothalf aslong asantennae, likethelatterinform

and

color, but lackingsubterminal

band

of white. Tentacular

and

dorsalcirri like antennae. Palps nearly twice as long a

;

tentacles,tapering slowly to near apex,ending abruptly inasharppoint. Basal halfcolorless, terminalhalfbrown. Surfacestudded with very minute papillae,visible onlyunder high power.

Ina smaller specimen,about half the lengthof the above, the palps

were

uniformly

brown

and ₈ onlyalittlelongerthanthe antennae.

Elytraon segments2, 4, 5, 7,etc.,23.

Whole number

of pairs, 12.

Body

segments27, includ- ing anal segment.

Only

the anterior pair of elytrapresent in eitherspecimen. These were

nearly square, theedge with a

row

of finepapil- Fig.9, Par lae,surfacestuddedwithtubercles. (Seefig.8.

)

Parapodium

uniramous, very thick, its dorsal surface covered with tubercles. (See fig. 9.

)

Toward

the end,

and

ventrally, the tubercles are replaced

by

fine villous-like papillae; dorsally, an elytrophore orcirrus. Short,"stout, ventralcirrus.

A

few(ten) verystrong setae, withblunt-pointed aipex;asingle largetooth

some

distancefrom apex. Basal part striatedlongitudinally.

A

singlelarge aciculum.

Length25

mm;

width5

mm.

Ofanother, length15

mm.,

width3.5

mm.

Collectedfrom Fajardoandstation 6079.

Polynoe,

sp.

From Mayaguez

was collected afragment, probablyaPolynoe,butowing-to loss of the anterior segmentsthis could not be determined with certainty.

An

elevated dorsal ridge

marks

off three distinctareasofthe

body —

_a

median and two

lateral. Surfaceirregularly

marked

with light

brown and

gray. Elytra transparent, not coveringentiredorsalsurface.

STHENELAIS

Kinberg.

Sthenelais

simplex

Ehlers.

Sthenelais simplex Ehlers,Annelidsofthe Blake,p.00, pi. 13, ligs.2and3; pi. 14,figs.1to0.

Ehlers says there arenoeyes. These,

which

agreeⁱⁿallotherrespectswithhis diagnosis,

show

a pairofverysmalldarkeyes, oneoneitherside ofthebaseofthe antenna.

Collectedfromstation 6066.

Sthenelais grubei, n. sp.

Grube, inhisdiagnosisofthisgenus (Annulata Semperiana,p.54),saysthat theelytraareborne on segments2,4,5,7,^etc.,alternatelytosegment23,

and on

everysegmentposteriorto that. Schmarcla (NeueWirbellose Thiere,p.146) states that the alternation ceases

on

the twenty-seventh segment.

The

specimens heredescribedagreewith Schmarda’sdescription.

The

head(fig.10)^isrounded,with a ratherbroad

median

fissureinto

which

theantennafits. Base of antenna with broad lateralflap,

narrowerat base. Palpsaslongasfirstninesegments.

Elytrawhite,,semitransparent. Firstpairbroad kidney-shaped; othersapproximatelyoval, the outer posterior border fringed with a fewdelicate papillae.

As

far assegment27thereisanarrow dorsalareanotcovered

by

theelytra.

losa. Fig.8, Elytron,x20.

apodimn, x15.

188 BULLETIN OF THE

^IT

NT

TEL)

STATES FISH COMMISSION.

Firstparapolium with a pairof longcirri

and

withlong delicate setse minutelyserrated along theedges. Other parapodia with apointed ventral cirrus. (Fig.

Hr.

c.)

On

segmentswithoutelytra a broad dorsal cirrus; on those with elytra the elytrophore carries anarrowcirrus on itsoutersur- face (fig. 11cir). Lobesofparapodiumthick,blunt. Setseondorsal lobearrangedina row; thoseon ventral lobeinapartialspiral.

End

^oflobeprolongedinto leaf-like processes. Similar processes

may

occurondorsal surfaceof parapodium. (Fig. 11tub.) Inthisfigure of the

parapodium

no attempt has been

made

to represent the

curved arrangementof the ventral setae. Dorsal setae long, capillary, withdelicate serrationsalongtheir edges. Ventralsetaeoftwokinds;

first

compound,

withlong,smooth, terminal joint ^(fig. 12); second, fewinnumber, complexly fringed alongtheiredges ^(fig. 13).

Pharynx,

when

everted,with anupper

and

lower“valve,” each with eleven papillae.

Two brown

teeth above

and

below. There^are

two

analcirri. In

some

specimens

many

of the anterior elytrae bear orange-colored pigmentspots.

This is apparently closely related to S. luxuriosa of

Grube

(Annulata Semperiana, p.54),but differs infringingof elytra and in

structureof setae.

One

specimenof28segmentswas14

mm.

long.

None

werecomplete,

some

bottles containingonlyanterior, othersonlyposteriorends.

Collected from stations 6057, 6059, 6061, 6062, 6063, 6073; Puerto Rico,

Boqueron

Bay,

and

San Antonio Bridge, San Juan.

PSAMMOLYCE

Kinberg.

Psammolyce

rigida Grube.

Psammolycerigida Grube,Verhand. d. Zool.-Botan. Gesellschaft in Wien, 1868, p. 631, pi. 7, fig.1. Quoted from Grube, AnnulataSemperiana,p.55,1878.

Collectedfromstation 6062.

PANTHALIS

Kinberg.

Panthalis oculea,n. sp.

Head

globular,prolongedanteriorlyinto

two

eye-stalks, whichcarrythe

enormous

eyes (fig.14).

Threetentacles,the

median

onanteriormarginofhead, the pairedbeneaththe eye-stalks

and

project- ingbeyond'their ends.

Apex

abruptlynarrowed,giving rise tomoderatelylongfilament,longerthan terminal filamentof unpaired. Palpslong, tapering,surfacecovered withminute filiform processes.

First

parapodium

withtwo long cirri, ending likethe unpaired antenna,and nearlyaslong as thepalps, but

more

slender,and smooth. Palps

and

cirriwith

numerous brown

dots.

A

tuft of setae

ondorsal surfaceof firstparapodium.

A brown marking

atbaseofunpairedantenna

and

a transverse

brown band

atposterioredgeof head. Smallerpair of eyesnearbaseof antenna.

Elytraon segments2,4, 5, 7,etc., through as

much

of the

body

as

was

preserved. Elytra nearly round, small,leavingthe greater partof the

body

uncovered, their surface divided

by

fine lines into nearlyequal, rectangular “cells.”

A

brownish pigmentin

many

ofthese spaces,with a tendencyto accumulatein greater

amount

toward dorsal

and

posterior edges.

Two

specimens, otherwise indis- tinguishable from the others,

showed

no pigment on the dorsal surface of elytra and the posterior edgesofthe^latterwereblack.

Pharynx,

when

extruded, as long as first 20 segments, with a

smooth

surface; atend with a dorsal

and

ventral“valve,” eachfringedwithpapilhe, of

which

the dorsal

and median

ventral are

much

thelargest.

Two

powerfulteethineachjaw,a

row

ofsmaller teethrunninglaterallyoneither side ofeach.

Figs. 10-13^.

—

^{Sthenelaisgmbei. Fig.10.Head,}x21; ant.e.,anterior eyes. Fig.

11,Parapodium, x18; v.c.,ventralcirrus;cir.,dorsalcirrus;elyt.,elytro- phore;lob.,processeson parapodium. Fig.12,Compoundventral seta, x

143. Fig.13,Complexventralseta,x143.

THE POL YCH.ETOUS ANNELIDS OF PORTO RICO. 189 On

ventralview oftheentireanimalaseries of blackcoiled structures

may

beseen lyingoneon either sidethe

median

linein eithersegment. Iftheparapodium becutoff, thesestructures pullout of the body, remaining attached to tip of parapodium

by

a ^flatexpansion. (Fig. 15, ch.r.)

Each

is a chitinousrod,

which

easilysplits

up

into a

number

of fine threads. Dissectionshowsthat the

firstseptumappearsbetween segments21and22,thecoelominfront ofthatbeing a continuouscavity.

Thiscavityisnearlyfilled

by

theserods, whichareshorterand

much

lesscoiledthan theyare farther back.

They

lie just above the nephridia, which can be seen below

them

as slender, short, white organs.

Rami

ofparapodium almostfused. Dorsal

ramus

(fig.15, ^d.r.) rounded,thin, withatuft oflong setae; afewlarger thantheothers,lanceolateatend, with a

number

of pairs of lateral spines (fig. 16).

Ventralsetaeoftwokinds; dorsal onesthick, brown, withendobliquely truncated,

and

coveredwith minute spines. (Fig.17.) Ventral ones colorless, not

more

thanone-fourthasthickasthedorsal, bentat

some

distancefrom end, withthe transversediameter

somewhat

greateratpointof bending;

fromthe

bend

toapex covered withtransverserowsofminutespines. (Fig.18.

)

About

55 of anterior segments preserved inone specimenmeasured17

mm.

in length, 2

mm.

broad withoutparapodia,4

mm.

withparapodia.

Collectedfromstations 6059, 6063,

and

Porto Rico.

Figs. 14-18^.

—

^{Panthalisocalea. Fig.14, Head,} x14. OnlytheleftpalpIsfigured. Fig.15,Parapodium, x14; d.r.,v.r.

dorsalandventralrami; v. c., ventralcirrus; c/t. r., chitinous rod. Fig.16, Setaofdorsalramus, x 143. Figs. 17 and18, Setsof ventralramus, x143.

EULEPIS

Grube.

Eulepis

splendida,n.sp.

Head

rounded, incised in front, unpaired tentacle small, rising from dorsal surface of head, reachingscarcely to halfthe lengthofthe paired; the latterarisingfromanterior lobe of head, about two-thirds as long as head ^{(fig. 19). All} antennae conical, with distal two-thirds dark brown,the very tip white. Palps long, smooth, white, tapering gradually to the end (fig. 19).

No

eyes could be seen.

First parapodium with twocirri and two tufts of delicate setae (fig. 20) arisingfromitssurface.

Parapodium

twistedso thatthe

two

cirri

come

to lievery nearlyin a horizontal plane. Setae long, thread-like, afew with veryminuteserrationsalong oneborder. Other parapodia with verydistinct rami. Dorsalramus with about 15 stout, brown, chitinous setae, curved at apex, thecurvedportion pointing backward.

Below

this is a tuft of fine thread-like setae,

some

with fine serrations along their edges. Thesearevery

numerous and

of a golden-redcolor. Ventral

ramus

broader thandorsal, with about 25 long setae. Setae about half the diameter of coarse dorsal setae, curved atapex, the curvedportionpointingbackward. Generalcolor of thesesetaeyellowish brown, withtips,asseenin reflectedlight, noticeablylighter. Ventral cirrus ovatewithbaseslightly narrowed, its apex

drawn

outintoaterminaljoint having

much

the form of the basal, but very

much

smaller. Dorsal

ramus

witheitheracirrus or

an

elytrophore (fig. 21).

Elytra borne on segments2, 4, 5, 7,etc., 21, 24. Grube, in his diagnosis of thisgenus (Annu- lataSemperiana,p.51), says thatelytraalternate anteriorly, afterthe

manner

of the Polynoidee, but posteriorlyareborne

on

allsegments. InhisdescriptionofE.hsemifera (loc.cit.,p.52),henotesthat theelytraarefound on segments2,4,5, 7,etc.,

up

to 21; that then theyskip first two, then three,

190 BULLETIN OF THE UNITED STATES FISH COMMISSION.

and from the twenty-eighth segment are found on all segments.

He

notes further that theelytra increase in size

up

to the twelfth pair;and then

become

smaller. InE. splendida there aretwelve pairsofelytra,thelast

much

the largest,borne on segment 24, but extending backso as tocoveras farasgreater partofsegment31, and theabovegeneric description

—

^thatallofthe posteriorsegments bear elytra

—

^appliesonlyif

we

regardthe broad, flatexpansionof the dorsalcirrus asanelytron (fig.

Figs. 19-22^/).

—

Eulepis splendida. Fig.19, Head, /17. Fig.20, Firstparapodium, x23; d.dr. 'andr.cir.,dorsal andventralcirri. Fig.21, Posteriorparapodium,x17. Figs.22a, 226, Seventh,andtwelfthelytra,x^8.

21). Thiscanhardlybe thecase, sinceit isfoundonallthe cirrus-bearing segments,exceptthemost anteriorones. Inthisrespectthesespecimensdo notagreewith Grube’sdiagnosis.

They

agree inso

many

otherrespects, however, that I have no hesitation in assigning

them

tothisgenus. Probably theloss ofposteriorelytraiscorrelatedwiththe

enormous

developmentofthe twelfthpair.

Parapodia around

head

very

much crowded

together; the second

and

third segments fused dorsally, sothatthesecondelytrophore apparentlyarises from anterior end of third segment.

The

firstelytracompletelycoverthe head.

The

firstelytrawere

removed

inorderto

draw

the head,

and

wereunfortunatelylostbeforethey could be drawn.

A

drawing ^of the seventh is

given in fig. 22«

and

of the twelfth in fig. 22b.

These are

drawn

tothe

same

scale,to

show

the increase insizefrombeforebackward. Excepta small notch

on

outer border, the edgeisentire.

Theircolor is white,

and

they show, under the microscope, a finelygranular texture.

At

ante^- rior edge of ventral

ramus

of

parapodium

is a darkspot.

Body

of37 segments. Length,37

mm. Width

withoutparapodia,3

mm.

;withparapodia,5

mm.

The

single entirespecimen

had

oneanalcirrus.

Collectedfromstations6062

and

6065.

Eulepis

fimbriata, n. sp.

Figs.23,24^.

—

Eulepis fimbriata. Fig. 23, Head, x18;at, line along which processfrom anterior elytrophore fuseswith head. Fig.24, Elytron,x22.

Head rounded

^(fig. 23).

Antenna

small, globular, onashortstalk. Tentaclesreaching a little

beyond

^tip of antenna, rising from under

surface of head. Palps long,smooth, closelyappressed in middle line.

Head

thickly

marked

with yellowishbrown.

Two

darkspots(eyes?)nearbase

and

onetoward apexjustbehindbaseofantenna.

Allappendages around thehead very

much crowded

together.

The

anteriorelytra

completed

cover the head, theirelytrophorestouching on

median

line.

An

anterior process frombaseof elytrophore

THE POLY CHAETOUS ANNELIDS OF PORTO RICO. 191

fuseswithdorsalsurfaceofhead. (Seeitsline ofattachmentat, infig. 23.) Parapodia

and

set* like those of E. splendida,except that set* of dorsal

ramus

are possiblynot so

numerous and

lack the brilliant color characteristic of the latter. Second

and

third segments

more

or less fused above.

Arrangement

of elytra as inE. splendida, the twelfth pair

much

thelargest, borneon segment21 and covering nearlyalltherest ofbody.

Elytra white, granular, like those of E. splendida,,but prolonged on lateral border into broad leaf-likeprocesses(fig. 24).

One

analcirrus.

Number

of

body

segments, 37.

Length, 24

mm.;

width, withoutparapodia, 4

mm.

Collectedfromstation60(51.

Family

PHYLLODOCID^.

PHYLLODOCE

Sav.

Phyllodoce

oculata Ehlers.

Phyllodocc oculata Ehlers,Annelidsofthe Blake,p. 135, pi.40, figs. 4,5,G.

AccordingtoEhlers, the ventral cirrus in each segment is fused along itswholedorsal edgeto ventralface of parapodium. Inthespecimenfrom PortoRico, althoughthecirrusiscloselyapposed totheparapodium, itisactuallyfusedonlyatitsbase. Ehlers describes, further,the parapodiumas uniramous, withananteriorand aposteriorlip,thelatterbeingthelarger

and

bifid atend. Inthese

it isthe anteriorlip

which

islarger

and

bifid.

Through

the courtesy^of Dr.

W. M. Woodworth,

I have

had

an opportunityofexaminingthe type specimen fromthe

Museum

ofComparative Zoologyat Cambridge, Mass., and Ifind thatEhlers was certainly

wrong

inboth theabovepoints.

The

ventral cirrus in the type specimen is attached onlyat its base,

and

the anterior lip is larger

and

bifid.

InallotherrespectsthePorto Ricospecimensagree,with Ehlers’s diagnosisofthespecies.

Collectedfromstation 6065.

Phyllodoce magma-oculata,

n. sp.

Head

rounded, broader than long (fig. 25). Eyes verylarge (e, fig.25). Dorsal antennae^-lanceolate,nearly twiceas longas head (d.ant, fig. 25). Ventral antennae on lowerface ofhead, equalin size to dorsal. Fourpairs of tentacular cirri, the largest 3.5 times as long as the antennae, thick, with acute termination.

The

othercirri smaller, equal.

The

gills

had

all been

removed

from the anterior segmentsof thebody. Those

which

remained werecov- ered with a slimy deposit, containing

numerous

foreign particles.

The

gills are especially liable to be broken

away

inattempting to

remove

thisdeposit. Gills broadly reniform ^(fig.26), withentire margin

and

withpointofattachment nearthe baseofthehilus. Coloratpoint^ofattachment,lightbrown.

Each

gill contains

numerous

anastomosing bloodvessels

and numerous

small, round, light

and

dark

brown

pigmentgranules.

Parapodium

asingleconical lobe, slightly bifid atthe end, withalarge aciculum.

About

nine

compound

set* on either side of the aciculum. Basal joint of set* long, most extendingnearly or quite the length of

parapodium beyond

tip of latter.

At

end the basal portion hasaclub-shaped enlargement,

marked by

veryfinelongitudinallines. Terminalportion rather

more

thanhalf aslong as basal, atbaseasbroadasbasalportion, taperinggraduallytoafinepoint.

Collectedfromstation 6067.

Phyllodoce, sp.

From

Boqueron

Bay

yvas obtained afragmentofaspecimenof thisgenustoo

much

injured for identification,

head and

tail lacking.

The

fragment was 25

mm.

long, 5

mm.

wide, and contained over 50 segments.

Body

black, with adorsal longitudinalband,

and

edgesof gills and cirrifringed withwhite.

Pigs.25, 26^.

—

Phyllodoce magna-oculata. Fig.25, Head, x 70; d. ant., dorsal antennre;e, eye.

Fig.26, Gill,X70.

192 BULLETIN OF THE UNITED STATES FISH COMMISSION.

EULALIA

(Sav.)Malmgren.

Eulalia quinquelineata, n. sp.

Head

oval, broadest just infrontof eyes, withaslightconstriction atbaseof tentacles (fig.27).

Tentaclesfour,equal,three-fourthsaslongashead,stout,withacutepoints.

Median

unpairedtentacle arisingabouthalf

way

from eyes tothe anteriormargin of head,

much more

slenderthanpairedand reaching

beyond

their ends.

Two

rows of small pigment spots begin atbase of unpaired tentacle and extend back betweeneyes, forming an )( shaped marking.

On

firstsegment, onetentacularcirrus; onsecond, two (adorsalanda ventral); onthird,a long dorsal, tentacularcirrus,

and

athick, fiat, ventral cirrus, thelatterlike the ventralcirriofsucceeding segments. Tentacularcirri

composed

ofa basal portion anda stout terminal portionpointed atend.

Dorsalcirrus ofsecondandthatofthirdsegments aboutequal in size

and

slightly largerthanother two.

First

and

second segments abouttwo-thirds thediameterofthe fourth

and

succeeding segments.

Body

450

mm.

long; without the parapodia2

mm.

wideat anterior end. It retains thiswidth untilnearposteriorend, where it narrows gradually.

No

analcirrus presentinthe singlespecimen in this collection. Segments at anterior end six times wider than long; toward posterior end this proportion is diminished and the parapodiaof successive segments are

more

widelyseparated than anteriorly. Inthepreserved specimen,

which

isdoubtless

more

or less contracted, thegills of each segmentoverlap thoseofsegmentin front.

On

accountofthe greatlength ofthe

body and

theextent to

which

itwascoiledI was unabletodeterminetheprecise

number

ofthesegments. Since,the length ofthe anteriorsegmentsisonlyabout0.33

mm.

,increasingslightlytoward posteriorend,itfollows that there

must

beat least 1,300segmentsin thewholebody.

Figs. 27-29^.

—

Eulalia quinquelineata. Fig.27,Head,x^7. Fig.28,Parapodium,x72. Fig.29,Compoundseta,x257.

Parapodium

asingle

ramus

withanteriorbilobedlipand posteriorshorter,rounded,one. Dorsal cirrusnearly a regularovate,attached

by

ventraljoint (fig. 28). Ventral cirrus comparativelylarge, ovate,hollowedoutonsidenext parapodium. Both cirri

show numerous

ramificationsofblood vessels in their interior.

Toward

posterior

end

the cirri

become

atrifle

more

acuteat ends

and

the whole appendage is

much

smaller, buttheir relativeproportions are aboutthe same. Setfe

compound,

the basaljoint long,swollenatend. Terminaljointbroadat base,bentslightly

and

tapering gradually to anacutepoint, with

row

ofminuteteeth on concave edge(fig. 29^.

Colorof

body

yellowishbrown, with afaintgreenishtinge. Dorsal surfacewithfivelongitudinal blackbands

—

^amedian,

two

admedian,

and

twolateral, thelatter justat baseof parapodia.

Median

narrow onfirst rive segments,

becoming

broaderfarther back. Lateral narrower than median,begin- ning on thirdsegment.

Admedian

abouthalf

way

betweenthe other two, alittlenearer thelateral;

narrowerand lighter colored than either.

They

begin on posterior edgeof fourthsegmentas small spots,

which

are repeatedonfifth

and

sixthsegments,

becoming

continuouslinesonseventh ^(fig.27).

Toward

posterior

end

this linebecomes

much

less conspicuous.

On

ventral surface a

median and

two lateralbands, similarin size

and

position to correspondingdorsalones, butwith no

admedian

^bands.

CollectedfromHueares.

THE POLYCHiETOUS ANNELIDS OF PORTO RICO. 193

Family

NEREIDS.

NEREIS

Cuvier.

Nereis

bairdii Webster.

NereisbairdiiWebster, Annelids fromBermuda,Bull.No.25,U.S.Nat.Mus.,(>.312, pi.8,figs.22-28.

Thereareapparently two-well

marked

varieties in this species, differing incolor

and

inform of parapodia.

One

with outerportionofhead

and

dorsal surface of anteriorsegmentsbrown.

A row

of cclorlessspotsin this

band

onhead

and

acrossanteriorendoffirstsix orsevensegments. Parapodia, especiallythe posteriorones,withexcessivedevelopmentofdorsalramus,asdescribedby

W

ebster.

A

rectangularwhite patchondorsal surfaceof eachpairof segments, overlapping the linebetweenthe two,thoughlyingmainlyin posteriorone.

The

secondvarietyhas a

band

of

brown

aroundthehead,

much

narrower thanthefirst

and

withno whitespots.

A

transverse

brown band

on each segment,

much

darker nearposterioredge. Lobesofparapodium

much

blunterand

more

rounded thaninfirst varietyandposteriorparapodianotwith excessive developmentof dorsal ramus. Dorsal cirri

much

longerthaninfirstvariety. Websterfigureslong

compound

setaewithsmoothterminaljoint. Inthe PortoRicospecimensthisterminaljointisfinelytoothed. These specimensagreeso closelywithone another,

and

with Webster’s descriptionof the species,in so

many

anatomical features, that I have thoughtitbesttoregard

them

ascolor varieties ofthe

same

species.

Collectedfrom PuertoReal, Arroyo, Boqueron Bay, Mayaguez, Porto Rico, stations 6065, 6091, 6092, 6062,

and

6063;

Ensenada Honda,

Culebra.

Nereis mirabilis Kinberg.

Nereis mirabilis Kinberg,AnnulataNova, Oefvers. af. K.Vet.Akad.Forh.1864,No.16, page 571. Quoted fromEhlers, Annelidsofthe Blake,p. 117, pi. 37,figs.1-6.

Nereisgracilis

W

^ebster,Annelids fromBermuda,p. 313.

From

a careful comparison of Ehlers’s with Webster’s description I conclude that these are identical species. Ehlersfiguresthe antennseas entire, whileWebsterfigures

them

withrather long basaljoints.

The

singlespecimenat

my

disposal (from

Boqueron

Bay) has a short basal joint, easily overlooked inpreservedmaterial.

Nereis arroyensis,n. sp.

Head

broader thanlong, the dorsal surfaceshading off graduallyinto thepalps, with

no

sharp line between the two. Anterior edge rounded, with two thick antennae. Eyes four, anterior pair semilunar in form (with transparent “lens”?) (fig. 30).

The

posterior dorsal tentacular cirri

had

been lost; the other cirri short (fig. 30). Inother specimens than theonefigured thesecirri were longer.

Body

colorless,broadestin

front,tapering graduallytoposterior end.

Body

of 73 segments.

Two

verylong analcirri. 45

mm.

long, 2.5

mm.

wide.

Parapodium

withdorsalcirrus longerthan

ramus

(fig.31).

Ramus

of

two

lingulae, the dorsal a little longer than the ventral. Setae of dorsal

ramus compound,

with long basal joint with prominent trans- verse striations. Terminal joint long,nearlystraight,finelytoothed.

Dorsal setae of ventral

ramus

like

setaeofdorsalramus. Ventralsetaewithbasal joint like dorsal, terminal joint short,

hooked

at end

and

with a

row

of long delicate spines on side. Dorsal lingula^of ventral

ramus

with anterior and posterior lobe (“lip”), the anterior a little the larger. Ventral cirrus not quite so long as dorsal.

Toward

posteriorend, parapodia

much

as anteriorly, except that lobes

become

alittle

more

pointed,

and

thesetsewith long terminal joint

become

relatively

much more numerous

inthe ventral ramus.

The number

ofsetseinthe dorsal

ramus becomes

verysmall.

CollectedfromArroyo andstation6052.

2d—F. C.B.1900—13

Figs. 30, 31.

—

^Nereis arroyensis. Fig. 30,Head,x17. Fig. 31, Parapo- dium,x18.

194 BULLETIN OF THE UNITED STATES FISH COMMISSION.

A

single

much

mutilated specimen from

Mayaguez

I have placed in this species, though it is possiblydistinct.

The

formof the head

and

palps

was

likethatof iV. arroyensis, as alsowasthatef the posterior parapodia.

The

anterior8 to 10 parapodia

had

verythickrounded lobes, showing only a divisionintothetworami.

Family

NEPHTHYDID^.

NEPTHYS

Cuv.

Nepthys squamosa

Elders.

NepthyssquamosaEhlers,Annelidsofthe Blake,p. 128,pi. 37, figs.7-10.

Collectedfromstations 6084, 6085, 6091, 6092, 6093.

Family

AMPHINOMIDAE.

HERMODICE

Kinberg.

Hermodice carunculata

(Pall.) Kinberg.

HermodicecarunculataWebster,Annelidsfrom Bermuda,Bull. U.S.Nat.Mus.1884, p.307 (See thispaperforreference to earlier literature.) Ehlers,Annelidsofthe Blake,_p.27.

The

colorvariesfrom

brown

toadecidedblue. Ehlers says the

young

arealight

brown

witha black

mark

acrossthe back.

Only

onespecimenofthis collection(18cm.long)

showed

thismarking.

Collected from Guanica Bay, Fajardo, Arroyo, Ponce, SanAntonio Bridge, SanJuan, Boqueron Bay, Mayaguez, Playa de PonceReef,

Ensenada Honda

(Culebra), stations 6092, 6088.

N0T0PYG0S

Kinberg.

Notopygos

crinitaGrube.

JSTotopygoscrinitaGrube, Beschreibung neuer oderwenig bekannterAnneliden, Arehiv. f.Natur.Jhr,21, Bd. 1, 1885.

Grube,AnnulataSemperiana,1878, p.7. Ehlers,Annelidsofthe Blake,p. 24, pi.1, fig.3;pi.3, figs. 5,•,7.

A

very full description is given

by

Ehlers; he does not figure nor describe a

row

of small, bead-like elevationson the dorsal surfaceof the

median

fold of the caruncle; these areabout 15 in number, very prominent in front,

and

gradually fading out behind; theyare relatively

more

promi- nentinthelargethaninthe smallspecimens. Inaspecimen42

mm.

longthefirstten^ofthesebeads were dark brown. Insmallerspecimens onlyoneor

two show any

color.

Collected fromstation 6079.

From

asecond specimenthe locality labelwas unfortunately lost in transferring.

EURYTHOE

Kinberg.

Eurythoe complanata

Pall.

EurythoecomplanataPallas,MiscellaneaZoologica,Hagae-Comitum,p. 109, pi.8, figs.19-26. QuotedfromEhlers,Annelids ofthe Blake,p.29.

Body

light gray, with

marked

iridescence. Setae white. Ehlers describes the eyes as black;

thesewerealightreddishbrown.

Collectedfrom Arroyo,Hucares,PuertoReal,

Ensenada Honda

(Culebra). Inoneotherspecimen thelocalitylabel

was

lost.

EUPHROSYNE

Sav.

Euphrosyne

trilobaEhlers.

EuphrosynetrilobaEhlers,Annelidsofthe Blake,p.31,pi.4.

Collectedfromstation 6098.

CHLOEIA

Sav.

Chloeia euglochisEhlers.

Chlocia euglochis Ehlers,Annelidsofthe Blake,p.18,pi.1, figs.1-8; pi.3,figs.1-4.

Two

specimensarein this collection.

Eyes

notsonearly fusedas inEhlers’sdescription.

Median

andpairedantennae

and

mostofthe dorsalcirriareofabrilliantviolet color.

AMPHINOME

Brug.

Amphinome

microcarunculata, n. sp.

Body

of singlespecimenincomplete,onlyanterior 36segmentspreserved. Lengthofthese,38

mm.

Breadthofhead,0.75

mm. Body

rapidlywidenstotwentieth segment,

where

itsbreadthis10

mm.;

THE POLYOHfiETOUS ANNELIDS OF PORTO RICO. 195

from here it narrows again rapidly; thirty-second segment, 5

mm.

wide. Color above, seal-brown, shading into ashy gray anteriorly; ventrally, ashy gray. Setae long, very fine, white. Caruncle small, smooth, notextending

beyond

limits ofhead lobe. .Dorsal setae shorterthanventral. Dorsal cirrus arising atbaseof tuft ofsetae,a little behind

and

ventral tothem. Cirrusaboutthree-fourths aslongas setae. Ventralramus witha thick fleshylip,fromthe dorsaledgeof

which

the setae arise.

Ventral cirrus slender, shorter than lip of ramus.

Two

tentacles

and two

subtentaclespresent, the

median

tentaclehaving beenlost. (Seefig. 32.)

No

eyes couldbeseen.

Mouth

surrounded

by two

segments, the posterior lip lyinginthe interruption of

median

line of third segment. Gillsappear firstoneighthsegment,as a single filament, attaining their full size about segment 12.

They

are very inconspicuous, lying behind the dorsal cirrus,

and

inpreserved materialalmost completely hiddeninthe con- striction between the segments. In its fully developed form each gillis

composed

ofatuftof thick,shortfilaments.

In the generic descriptionof

Amphinome

(Kinberg; Sven- ska. Vetensk. Akad. Ofversigt, vol. 14, pp- ¹¹ to14, 1858) it is statedthat the gillsbegin on segment3. In the absenceof a

median

tentacle

and

inthe factthatthegillsappear firstontheninthsegment, this specimendiffers fromthe genericdiagnosis. I have regardedtheformerasan accident,

and

thelatteras notofsuffi- cientimportanceon

which

toforma

new

genus.

Collectedfromstation 6070.

Family

CHRYSOPETALID./E.

BHAWANIA

Schmarda.

Bhawania

goodei Webster.

BhawaniagoodeiWebster, AnnelidafromBermuda,p. 308.

A number

offragments, lackingboth head

and

tail,

seem

undoubtedlytobelongto this species, thoughtheremainingparts differ

somewhat

from Webster’sdescription. Dorsal

and

ventralramiof parapodia separated rather

more

widely than inWebster’sdescription. Terminal portionofventral

ramus expanded

at base and narrowing rapidly toward apex.

Webster

figures it as slender

and

conical. Dorsal

ramus

as inWebster’sdescription. Dorsalpalese ina

row

extendingacrossback, the

median

onesbending inward,sothat those of opposite sidesoverlap. Set*of two kinds. Thoseof dorsal ramus constrictedat base, likedorsalpale*,

and

for inner two-thirdsof their length

marked

withthe longitudinalandtransverse striationscharacteristic of latter. Theseare figured

by Webster

assmooth, with sharppoint

and

broadbase.

The

set* of the dorsal

ramus

are regarded

by Johnson

(Proc. Calif. Acad. Sci., vol. 1, No. 5, p. 162) asasecond formofpale*,

and

areoneofthe charactersofhis

new

genusHeteropale.

The

data in

my

possession are few,but from

what

I haveI

am

inclined tobelieve thatJohnson’sHeteropale, shouldbediscarded infavorof Schmarda’s Bhawania. Intheshape

and

position of the otherset*, thesespecimensagreewithB. goodei.

Ehlers (Annelidsofthe Blake,p. 34)describesfragmentsofa Chrysapetallidin

which

thepale*

cover the back.

He

does not describe

any

otherdetails.

CollectedfromArroyo.

Family

EUNICIDAi.

EUNICE

Cuvier.

Eunice ornata

Andrews.

Eunice ornataAndrews, Annelida PolychsetaofBeaufort,N.C.,Proc. U.S.Nat. Mus.,vol.14,p. 284, 1891.

Collected from stations 6080, 6079, 6073, 6092; Mayaguez; Ponce; stations 6086, 6091; and afemalewith eggs fromArroyo. Inthespecimenfromstation6092 thegillsbeganonthe sixthseg- ment, insteadofthefifth, which, accordingtoAndrews, isthenormal.

Fig.32.

—

HeadofAmphinomemicrocarun- culata,x8;car.,caruncle.

196 BULLETIN OF THE UNITED STATES FISH COMMISSION.

Eunice

denticulata Webster.

EunicedenticulataWebster,AnnelidafromBermuda,Bull.U.S.Nat.Mus.1884.

Webster’sspecimens,preserved in alcohol, wereof ayellowishwhitecolor.

One

inthis collec- tion,preserved in formalin,

was

adirtywhitethrough most of the body,dorsal surfaceof head

and

anteriorsegments irregularly

marked

with dark green blotches. Gillsappearas singlefilamentson the twenty-eighthsetigeroussegment.

Head

deeplybilobed. Tentaclessmooth, equal, about twice aslongasthe head.

The

dorsal

ramus

of the

parapodium

containscomb-shapedsetae,

which

arenot described

by

Webster.

The

headofonelargespecimen

was

mottled with brown.

Collectedfromstations 6065, 6079,

on

corals atMayaguez,

and

from

Ensenada Honda

(Culebra).

Eunice violacea-maculata

Fillers.

Euniceviolacea-maculata Ehlers,Annelidsofthe Blake,p. 86,pi.24,I,figs. 11,12; pi. 25,figs.1-7.

Two

longtransversely

banded

^analcirri. Collected from

Ensenada Honda

(Culebra),

and

from station 6079.

Eunice

articulataEhlers.

Eunicearticula Ehlers,Annelidsofthe Blake,p.83,pi.24, figs. 8, 9, 10.

Gillsbeginonthe third setigerous segment. Ehlers says there aretwoanalcirri. These have four,twolong, articulated,

and two

veryshortones.

From

PlayadePoncereef

was

collectedaspecimensuperficiallyveryunlike Ehlers’sdescriptionof this species,but agreeing so closely in

most

charactersof importance that I have included it here.

The

differences are possibly sexual.

The body

is

much

larger

and

broader. Generalcolor, light brown. Segments3, 7, 8,

and

9 white.

A

narrow

brown band

atthe baseofeachsegmentofantennae

and

cirri.

A

smallerspecimenfromstation137

shows

these

same

colormarkings.

Collectedfromstations 6065, 6098, 6096,

and

Playa de Poncereef.

Eunice

siciliensisGrube.

EunicesiciliensisEhlers,Die Borstemviirmer,p. 353, pi.16. (See Ehlers’spaperforreferences topreviousliterature.)

Inan animalof350segmentsthegillsappearfirstasa simplefoldon segment145. Ehlerssays that the distinction in length between the

two

pairs of analcirriis notgreat. Inthesingleperfect specimenin this collection

two

of these are

much

longerthanthe other two.

Collectedfromstation 6064, CaballoBlancoreef,

and

Arroyo.

Eunice

fucataEhlers.

Eunice fucataEhlers,Annelidsofthe Blake,p.91,pi.25, figs.8-20.

Ehlers does not mentionthepresenceof analcirri. Inoneof these there are

two

long, rather fleshycirri. CollectedfromArroyo, CaballoBlancoreefs,

and Boqueron

Bay.

Eunice

auriculata, n. sp.

Prostomium

bilobed,eachlobetriangular,with

apex

pointing forward. (Seefig.33.₎ Thislobing

is

much more

prominent onthe ventralface. Tentacles

composed

ofa short articulated basal portion

and

along,smooth, terminal portion, thelattertaperinggraduallytothe end.

Median

antenna very long, reachingbackto the eighteenth segment.

Median

paired antennae half as long as unpaired.

Outerpaired antennaeabouthalf aslongasmedian. Peristomium long at sides, deeplyhollowed in front, sothat

median

length isscarcely two-thirds thatof side.

Median

lengthaboutequaltothree succeeding segments. Third segment about equal in width to succeeding. Nuchal cirri smooth, tapering gradually'from a rather thick base to a sharply-pointed apex.

Apex

reaching a little

beyond

front borderof peristomium.

The body

graduallynarrowstothe fourth segment,

and

from heregradually increasesinwidthtoaboutthe tenth.

From

there a gradual decrease againas far as thirtieth. Thirtieth segment a trifle narrower than the first. Dorsal cirri very large. Branchiae begin

on

nineteenthsegmentasasinglefilament.

On

thetwenty-first thishasdividedintotwo,

and

ataboutthetwenty-seventhitdividesagain.

They

never

become

verycomplex.

Anteriorparapodiablunt,withanterior

and

posteriorlips,theformeralittlethe longer

and

with aroundedlobeatitsapex. (Seefig. 34.)

About

12acicularsetae in the dorsal bundle

and

over 20 setaeinlowerbundle.

The

latterwith long, acute, terminal joint. Ventral cirrusshort and fleshy;