On the occurrence of a species of <I>Cremnobates</I> at San Diego, California

PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 147

O^ THE OCCURREIVCE OF A

SPECBESi

OF CREMNOBATES AT SAN

©SEGO, CAEIFORNIA.

By ROSA SMITH.

Three specimens of a small scaly Bleuny fonud inthose rockytide- poolswhich areheavilylined witli algte,on

March

_6,1880.

This Blennyisevidently of rare occnrrence, this one point beingat present its only

known

habitat on the Pacific coast of the United States,

and

these three specimens the only onesIconldprocnre. Itis

accompanied

by

OUgocottus(malis, whichin this vicinityisabundantin allrock-pools,

by

Gibhonsia elegcms of a dnll color,

and by

HypleurocM-

lusgentilis.

These specimens werei^rovision ally identified asbelongingto Cremno- hates monoxjlitlialmus (Glinther) Steindachner {Anchenopterus monoph- thalmus Giinther, Cat. Fishes Brit. Mns., iii, 275), a species hitherto

known

from threeexamplesfrom thePacific coast of CentralAmerica.

My

^{specimens differfromGtiuther's} description inthe followingpartic- ulars: The dorsal Jin is continuous, the

membrane

of the third spnie joining the fourthnear its

summit

in

two

examples, at its first third in the other.

The

iieadis x^roportionally shorter,formingtwo-ninths of the total length instead of one-fourth,

and

the

body

is less elongate, its depth formingone-fifth the total length instead of one-sixth.

The

characters of the

San

Diegan form of this genus agree

more

closely with Steindachner's description of Cremnohates affinis (Ichthyologische Beitriige, v, 178), a species considered

by

its describer as doubtfully distinctfrom G. monophtlialmus. G.affinis is

known

fromone individual taken on the

West

Indian island of St. Thomas, the i)roportions

and

colorationof whichaccordwith

my

specimens,but this species also has the

membrane

from thethird dorsal si^ine joiningthe fourthatits hase ("die

Membrane

des dritten letzten Strahles setzt sich andieBasisdes folgenden ersten Stachels des zweiten Dorsales an").

If the specimens from

San

Diego prove to be of a distinct species, which seemsi^robable,they willbe separatedfromthose already

known by

the single merely emarginate dorsal fin, instead of two separate

fins. In

any

event, the genus Gremnobates furnishes an interesting addition tothefaunaof our Pacificcoast.

Gremnobatesintegripinnissp.nov.

Desceiption. — The body

^is oblong, compressed.

The

head is less

thanthe fourth of thetotallength, which measures two inches

and

an eighth.

Gape

of

mouth

oblique, the maxillaries reaching a vertical line intersecting x>osterior rim of orbit.

Head

conical, thickish, with the orbits placedfarforward,

smaU

fringed tentacles ontheir superior margins, atentacle

on

posteriormargin of anteriornostril,

and

i^almate tentacleson occii)ut.

A

^{cusp orspineonopercle.}

Dorsal continuous, comi^osed wholly of spines of nearly equal height

148 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

throughout, thefirst

and

second spines alittle higherthan the third, whichisrather higher thanthe fourth,the third

and

fourth

somewhat

separated, but connected

by membrane

nearly as highas thatconnect- ing fourth

and

fifth, the other spines gradually increasing in height backward.

The

threeanteriorspinesless stiff thantheothers.

The

two anal spines areconnected

by

a

membrane

tothe softpartof thatfin,theanterior insertion of which isabout

midway

betweentip of snout

and

base of caudal.

The

caudal isliosteriorlyrounded,itsinter- radial

membrane

being emarginate; the

membrane

of the last dorsal spinejoins the base of the first ray of the caudal, while the latteris free fromanal, the free tipsof which extend

beyond

baseof caudal.

Pectorals fan-like, theirextremitiesreaching averticallineintersect- ingvent. Branchiostegal

membranes

continuous under throat.

Body

covered with conspicuouscycloidscales,whicharesmalleronthe belly.

'No scales on headorfins.

Lateralline of thirty-eight scales, beginningon the scapularregion, running anteriorly very high, abrui>tlycurvingaroundi)ectorals,

and

i:)ursuingastraight courseonthe

median

lineof thesidetothetail.

Teeth rather strong, conical, in a narrow band; a single series of rather strongteethonvomer.

Color varies in three individuals: one is a dark brownish gTay;

another, of equal size (2^ inches long), is lighter; while athird, of 1^

inchesin length, is lavenderincolor.

The

markings aresimilaron all

my

specimens,each beingmaculated

and

obscurelybarredwith a darker shadeof its

own

color; the dorsal region is always darkest,

and

each individual has an ocellated spot, black, with narrow pale edging on posteriorportionof dorsal fin. Dorsaland analfinseachwithnarrow paleedgiug. Pectoralfinsreddishviolet at base,with a black crescent aroundit,therestofthefin i^ale,withdarkcross-bars. Yentrals barred.

Caudal with a dark bar at base, the rest of the fin translucent, with narrow dark barsformedof spots.

Table of measurements.

Length:

Total, in iuclies 2.05

Tobase of caudal, iuinches 100

=

^1.70

Body, greatestdei^th 23

Head:

Length ^' 26

Diameterofeye 7.5

Lengthof maxillary 11

Dorsalfin

:

Total length 80

Distancefromsnout 21

Lengthof anterior part 9

Heightoffirstspine , 6

Heightofsecond spine 7

Heightof third spine 4

Heightof fourth spine 3

Heightof highest spine 7.5

Heightofmembraneconnecting thirdandfourth spines 1.8

PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 149

Analfin,distancefromsnout _4.7

Caudal, length 18

Pectoral,length 24

Ventral, length ₁₇

Finrays

:

Dorsal XXXII

Anal _II,-20

Scalesin lateral line 38

The

specimens have been presented to the United States J>rational

Museum.

San Diego,

Cal., April 10, 1880.

OTSSOITIE

ISEW SPECIES OF EOCEIVE

MOL.L1JSCA

FROM THE

SOITTIS- EBIV UIVITED

STATES.

By AWGELO IIEII.PR1^.

A

^{part ofthespecieshereindescribed have been}for severalpast years

among

the collectionsof the United States National

Museum.

Those which arementionedas coming from Texas were collected

by

Mr. G.

W\

Marnoch,

who

sent

them some

years agotoDr. C. A. White,

and

were

by

the lattergentlemanpresentedtothe National

Museum. The num-

ber following thedescriptionof each species is that by whichit isre-

cordedinthe

museum

register.

PLEUEOTOMA, Lam.

Pletjeotoma pagoda,

n. sp.

Plate, fig.1.

Yentricose; whorlsaboutnine, thebody-whorlnodulatedon itsmost convex portion (nearlycentral), the nodulation consisting of a single seriesof sharp, obtusely-pointed,

and

flattened spines ornodes, which frequentlyappeardouble

by

the crossing of

an

impressedlineovertheir basalportion; uppervolutions witha similarseriesof nodesalmostim- mediatelyabovethesuturalline,

and

graduallydwindlingoffintoacren- ulation; upi)er surfaceof thewhorls concave,faintlystriated,thesinual rugsB indicating but a faint sinus; lower surfacewithnumerous well- developed revolving lines, which

show

atendencyto alternate. Aper- tureexceeding the spire in length, considerably contractedat aboutits center.

Length, _1^inch. (No. 1505.) Eoceneof Alabama.

This speciesinits generalappearance greatlyresemblescertainforms of Fusus,

and

a comparisonof

more numerous

specimens

may show

it tobelong tothat genus, althoughthe ornamentationof the whorls, as well as the sinual indication,

more

clearly point to Pleurotoma.

The