Proceedings of the United States National Museum

(1)

118

^'

PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

[1885.

Indexto thegenera

—

Continued.

Genera.

Pyrocephalus Q.

Querquedula Queiula Quiscalua

R.

Ramphastos Eamphocelus Eamphocaeuus Kegel hinus EhodiDOcichla Rhyac'opliilus Ehynchops r.h.vnchocyclus Rosthramus Rupoinis

S.

Saltator Sayoruis Scleruiiis Scim'us Selaspliorus Sek'uideia Ser[)uphii2a Scti'pha'ia Sittasonius Spatula Spcotvto Strix.' Spiza iSpizaetns i--])iziiistur.-.

Spnr()])hila Stel,i;idopteryx Stenopsis Stevii.i

StiiMulla ,

Sula Sylvauia Syiui)heniia Synallaxis

667 361 202

243 128 258 531 22 616 689 30O 535 552

158 275 240 59 427 469 337 76 223 670 512 502 179 542 541 168 85 394 684 204 676 68 626 211

Genera.

T.

Tachycineta Tacliyphonus Tanagra Tantalus Tetragonops Thalurania Thamnophilus Thamnistea Thrasaetus Thryophilus Tliryothorus Tigrisoma Tinanius Tityra U'odiiostrum

Totauns j

Tryngitos ^". ^.

Trochilus Troglodytes Trogon

Turdus , y

Tyranniscus

Tyranuulus i

Tyrannus

F.

Urospatha [Jrul)itmga Urnbitornis...;

V.

Vireo Vireolanius Vireosylvia Volatiiia._..•

X.

Xonops Xiphorhynclius

Z.

Zenaidura Zonotrichia

o SP<

k5«

83 142 126 633 472 423 244 250 544 29 36 646 596 341 280 614 627 426 40 382 11 290 289 331

366 546 545

87 171

221 239

177

IDENTIFICATION OF THE SPECIES OF CYFRINIDiE AND CATO- STOMIDiE, DESCRIBED BY DR. CHARLES GIRARD, IN THE PRO- CEEDINGS OF THE ACADEMY OF NATURAL SCIENCES OF PHILA- DELPHIA FOR

1856.

By DAVID

^.<«.

JORDAN.

In the years from 1851

to

1855

large collectiou-s of

fresh-water

fishes

were made

iu

the western parts of the United States by

naturalists at-

tached

to the

United States and Mexican Boundary Commission and

to

the

Pacific

Railroad Survey.

The new

speciesiu these collections

were described by Dr. Charles

Girard

iu dift'erent

papers

in

the Proceedings of the Academy

of

Nat-

ural

Sciences of Philadelphia, 1853

to 1859,

and again

in

the report

of the United States and Mexican Boundary Survey and the United

States and

Pacific

Railroad Explorations, Vol. X, both works being

issued

in 1859,

(2)

1885 _]

PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

11

The

^Cypridida;

aud Catostomidcc iucluded

in

these

collectious

were nearly

all

described

for

the

first

time

in

a paper

entitled

" Eesearches upon the Cyprinoid

fishes

inhabiting the

fresh

waters of the United States west of the

Mississippi Valley,

from specimens

in the

museum

of the Smithsonian

Institution."

This was

i)ublished in

the Proceed- ings of

,the

Academy of Natural Sciences

of

Philadelphia,

1850,

pages

154-208.

Girard's descriptions of

these

difficultfishes

are very

far

from good.

The characters noted

are usuallj' superficial ones,

and

real si>eciSc dis- tinctions,

such

as differencesin

the numbers

of

the

scales of thelateral line, are generally overlooked..

After Dr.

Girard's

connection with

the

Smithsonian

Institution

had

Closed

many of

his labels

became

obliterated;

some of

his

types were

lost or

destroyed, and a

certain identification

of many

of his species

could not be made. A

careful

examination

of

the material studied by him, including many

bottles

from

wliich tlie labels

have been

lost,

has enabled the

writer to positively identify

very many of

his

types not

hitherto

recognized.

,

There

isalsoaseries

of manj' of

Girard's

types

in

the

i)ossession of the

Academy of

Pliiladtlpbia,

these having been

pre-'^

sentt'd

many years ago by the Smithsonian

Institntion.

These types have been studied by Mr. Seth

^E.

Meek, and many

of

them by

the

writeralso. iv

The present

])aper

contains a

lis^ of Girard's si>ecies,

arranged

In

the order given by him, and opposite each my

identification of it.

Those

species of

which the types

arestill in

the National Museum are

indicated

by a

star(*);

those which

are

found

ati)resent

only

in

the Academy

of

Sciences by

a

dagger

(t).

A number

of

synonymic

notes aie

added. A

few notes taken from manuscripts of Mr. Meek, and not

verified

by me, are

credited to

him.

Name.

^! Identification.

*Mylocbeilnsfraterculns Mylochilns caurniis,(Rich.)-

'Myliipliniodou coiiocopi.alns,(B. &, G.). Mylopbarodon coiioccpbaliis, (B.

& G).

*Carpiodesdaiuaiis Iciiobn.s velifer bison,(Ag. )

'Ictiobiistniiiidus,(~B.

&

^<'t.) ^Ictiobiis ^{vt liter}^tumid^us,(B.

&

G.).

* Moxostoiua claviCoruiis' .... Eiiniyzon succtiaoldoiit;u!s,(Mitch.).

*'Jloxostomakenncrlii Erimyzousucetta,(Lac ).

Moxostoma

victoria' Miuyireiiianiel;iuo])s,(Raf.).

Moxostoiua caD)]»ht4li .. Eriiuyzousucctta,(Lac).

*Ptychostouuis cougcstus,(B. &.G.)

Moxostoma

cougestum,(B.

&

^G.).

'This^isthe ordinarynorthernErimi/zon,describedin Jordan&lGilbert'sSynopsis,

p. l'^'.^, as Erimijzon micetla.

The two

forms of Erimyzon seem to grade into each

other. SouthCarolinaexamplesbelongtothe southern type,whichis,therefore, in all ])robability,thereal Cijijrinussuceitaof Laccpiide.

The

northernform (siiceltaof the Synopsis)

may

standasErimi/zonsucetta oblongus,andthesouthernform(E. goodeiof theSynoj'sis) as Erimi/zonsucetia.

The

southern formrangesfrom South Carolinato Texas,andthetype ofJ/,kenncrliibelongstoit. i

(3)

120 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

[1885.

Name.

(4)

1885.]

PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM, 121

Name.

*Dioncla episcopa'

*Dioiiflasereua^

*Diondatexeusis^

Diondapapalis

*Dionda argentosa*

t Diondacbrysitis"

tDionda melanops^{^}

*Diondacouchi ^.

Dionda

plnmbea

Diondaspadicea

Diondagrisea,(U. S. Pac. R. K.)..

*Hyborliynclius perspicuus

*

Hyborbynchus

tenellns

Hyborbyncbus

punicens

*

Hyborby

ncbnsconfertus

*Pimephales macnlosna Pinicpbalesfasciatua

*

Algoma

amara

Algoma

tinviatilis

*Cocbloguatbusornatns,(B.

&

G.).

*

Hybognatbns

argylitis

Hybognatbns

^evansi

*

Hybognatbns

placitus

*Aigansea bicolor

*Aiganseaobesa

*Aigansea formosa'

*Laviniaexilicanda, (B.

&

G.)

*Lavinia bareugns

*Argyrens dnlcis.

Identification.

Dionda epiacopa,(Grd.).

Dionda ^seven^a,(Grd.).

Dionda e])isei)pai,(Grd.).

?Dionda serena, (Grd.).

Dionda episeopa,(Grd.).

Diondaserena, (Grd.).

Diondamelanops, (Grd.).

?Diondamelanops,(Grd.).

?Zopbenduin

fplumbenm,

(Grd.).

FZophendnm

fpliimbenm, (Grd.).

unebalisplacita, (Grd.).

Aiganseabicolor, (Grd.).

Aiganseaobesa, (Grd.).

Aiganseasymmetrica.(B. «feG.).

Laviniaexilicanda, (B.

&

^G.^).

Laviniaexilicanda,(B.

&

^G.).

Rbinicbtbyscataractse dnlcis, (Grd.).

Agosianubila, (Grd.).

Argyreusnubilus^{^}

1Tbis speciesbasbeenlately fairlydescribed

by

ProfessorCope, nnder tbe

name

ofHytognathusflavipinrm.

Tbe

snborbital bonesin tbisandotberspecies of"Dionda"

areratbcr broad,

mncb

as in HijbognatliusvuchaUs. Lat. 1. 37.

*Tbis species bas been described nnder tbe

name

of Hyhoynaihus nigrotceniatus Cope. Itbaslargerscalesthan D. episeopa,

and

ratber smallereye. Lat. 1.34.

'ThisspeciesseemstobeidenticalwitbD.episeopa. Lat. 1.36to39.

•Tbisspeciesseemstobealsoidenticalwitb D. episeopa. Lat. 1.37.

^Tbe types ofDionda serena

and

D. chri/sitis

mncb

resemble eacb other, except that D.8e)-enais

much

darker in color. D.chrysitis has scales 5-32-4.

Head

_4fin length; depth4^.

Eye

3^^inhead.

Head

shorter

and

bodylessdeepthan

shown

in Girard's figure. (Meek.)

6Z). melanopsandD.eouchiare littleditferent.

The

former bas scales7-38-4; the latter(3-36-3. Bothare deeperthan the otherDionda'.; depth3| to3f^{in length.} In D.couchithelower

jaw

basa consi)icuonsdermalfold. TbisislittledevelopedinZ).

melanopsandobsolete in tbe otberDionda':.

The

black caudal spot^is

mncb

moredis- tinct inD. melanopsthanin D.^couchi. (Meek.)

'Theoriginaltype of Fogonichthyssymmetricus, B.

&

^G.,basnobarbel,andthe teeth are 4-5. Lat.1.53.

Depth

4^ in length. It seems to be identical withAigansea formosa.

The name

Aigansea shouldapparently supersede Leucos(preoccuiiied)and Myloleueus, Aiganseaantica, Cope(typeexamined

by me)

seemsto be a validspecies of tbisgenus.

The

following notes

may

beaddedtoCope's description:

Head

3f in length; depth3^.

Head

acute,subcouic; snout rather pointed,_{4f in} head. Insertionofdorsal

midway

betweenpupil

and

base of caudal.

Month

small jawsequal;maxillary4 inhead. Pectoralshort,not nearlyreachingventral. Lateral linedecurved. Scales10-49-6. Teeth4-5,little booked, witb very broad grinding surface.

^'I

am

unable toseparate Apocope vulnerata, henshavii, rhinichthyoidis, oveouesifrom A. nuhila. A.oscula, Cope(notGrd.), isalsotbesame,asisprobablyApocopecarring- toni also.

The

genusApocope

may

apparently,withoutviolence,be unitedtoAgosia.

(5)

122 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

1186^.

Name.

*Argyreusosculus'

Argyreusnotabilis Agosia chrysogaster Agosiametallica

*Pogonichthysintequilobus, (B.

&

G.)

*Pogonichthyssynimetricus,(B.

&

G.)

*Pognichthysargyreiosus,(B.

&

^G.)"-

*Pogonichthys

communis

*Gobiogelidns

*Gobio£estivalis^{^} Gobiovernalis

*Leucosomusdissimilis^*

*Leucosomuspallidus

*Leucosomusincrassatus

*Nocomisuebracensis

Esoglossum

mirabile''

Meda

fulgida**

Cliolavigilax,(B.

&G.)'

Cliolavelox

*Cliolavivax

*Alburnusdilectus*

*Alburnus umbratilis'

tAlburnusamabilis"'

Identification.

Agosiaoscula, (Grd.).

Agosiachrysogaster, (Grd.).

Agosiametallica, (Grd.).

Pogonichthysmacrolepidotus, (Ayres).

Algansea symmetrica,(Grd.).

Pogonichthysmacrolepidotus,(Ayres).

Platygobiogracilis,(Rich.).

Hj

bopsis gelidns, (Grd.).

Hybopsisaestivalis,(Grd.).

Hybopsisamblops,(Raf.).

Couesiusdissimilis, (Grd.).

Semotilus atromaculatus,(Mitch.).

Hybopsisbiguttatu.s, (Kirt.).

Phenacobiusuurabilis,(Grd.).

Meda

fulgida, (Grd.).

Cliola vigilax, (B.

&

G.).

Cliola vigilax, (B.

&G.).

Cliola vigilax, (B.

&

^G.).

Notropisdilectus, (Grd.).

Notropisumbratilis, (Grd.).

Notropisamabilis, (Grd.).

'Thetype of Argyreusosculushasabout90scalesin thelateralline,audisidentical with Apocopevenfricosa.

The

typeofA. notabilis Icannot find, butthefigure seems tobeintended for A<josia oscula.

-Thetype ofPogonichthtjs argyriosusisthe

young

of F. macrolepidotus,withthe caudal lobebrokenotf.

The

genus " Symmetrurus," based onthis species,isthereforeval- ueless.

"Ceraiichthys sterlctus, Cope, seems to beidentical with Gohio aestivalis; thetyj)es

have been compared

by

me.

*I

now

regardCouesius milneri, Jor., Ceratichthys prosthemius,Cope,

aud

Gohioplum- beusas identical. Couesiusdissimilishasthescaleslarger thanin C.plumbeus; lat.1.

60; cross series22, thelateral line

much

decurved; the

mouth

oblique, subterminal,

much

as inSemotilus; headflattishabove^; barbelsmall,terminal.

Head

4inlength:

depth4; eye 4|inhead.

sExoglossummirabile, Grd.

=

Sarcidium scopiferum.Cope

=

Phenacobiusteretulusvar.

liosternus,Nelson.

'^In thetypes of

Meda

fulgida,the teeth are2,4or 5-5, 1or2.

The

genusisprecisely identicalwithPlagopterus,Cope.

Meda

fulgida and

Meda

argrntissimaare,however, apparentlydistinct species,althoughclosely related.

''Cliolavigilax,B.andG.

=

Cliolavelox,Grd.

=

Cliola vivax, Grd. := Hybopsistudita- nu8,Cope

=

Alburnopstaurocephalus,

Haj =

Hypargyrustuditanus,Forbes.

*Alburnusdilectus,Grd. =: AlburnusoUgaspis,Cope.

The

typesofthelatter,exandned

by

me,have11analrays.

'Alburnusumbratilis,Grd.

^

Luxiluslucidus,

Grd^

Notropi.i nigripinnis,Gilbert.

The

typo ofthisspecieshas 44 scales inthelateral line. Notropismacrolepidotus,Forbes,

much

resembles the

young

of this species, but is said to have rather larger scales.

(6-40-3 instead of9 or10-44or 45-4.)

'0Notropis amabilis seems to be a valid species.

The

following additions

may

be

made

tothedescription asgiveninthe Synopsis.

Head

less acutethan in N.rubrifrons.

Jaws

equal; maxillaryreachingfront ofeye; fiusshort; duskyblotchatbase

ofcaudalveryfaint.

Head

_4Jinlength; depth5. A. i.8. Scales5-34-3.

(6)

1885.]

PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 123

Name.

t

Albumus

megalops'

*Alburnussocius-

*Alburuopsblennius^'

Albumops

fihumardi

*Albuniopaillecebrosus^*

*Codoniaoruata Coclomavittata PlargyrustyiMcns

Plargyms

bowniani

CyprJnella bubalina, (B.^ife.G.)

*Cypriueliaumbrosa^•'

*Cyprinella gnnnisoin''

t Cypriueliabeckwithi'

Identification.

Notropis swaiui,(Jor.

&

^Gilb.).

Notropissociu8, (Grd.).

Notropisbleuniu.s, (Grd.).

Notropissp.

Notropisillecebrosus,(Grd.).

Notropis oruatus,(Grd.).

Notropisvittatus, (Grd.).

Notropis

mega

lops, (Raf.).

Notropismegalops,(Raf.).

Notropis bubaliuus, (B.

&

^G.^).

Notropis bubaliuus, (B.

&

G.).

Notropis bubaliuus,(B.

&

G.).

Notropis bubaliuus,(B.

&

G.).

'^oti'opis swaini,Jordau

&

Gilbert, nom.sp. uov. := Alburnas megalops, Grd.

The name

megalopsispreoccupiediuthegeuusNotro^ns;

we

thereforeproposefor thisspe- ciesthe

new name

jSfotroi}isswaini.

The

following descriptionistaken fromsjiecimens obtained byProfessor Gilbertandthe writerintheRio

Comal

at

New

Braunfels,Tex.

Thesehave been compared withtypes of

Albumus

megalopsand

Albumus

socius inthe Philadelphia

Academy

Body

moderatelyelongate,

somewhat

compressed, a little

more

robust thaninN.

rubrifrons; back a little elevated.

Head

rather short

and

broad,the interorbital space

somewhat

convex,itswidth abouttwo-thirds that of theeye.

Eye

verylarge, 2i inhead,abouthalf longerthanthe rather obtusesnout.

Mouth

large, oblique,the lower

jaw

slightlyprojecting; the maxillary reaching nearlyto frontof pupil; its length 2^inhead. Finssmall; dorsalinserted

somewhat

behindventrals. Lateral linedecurved; scales large, 16beforedorsal.

Head

4^-inlength; depth4^. D.9. A.9. Scales6-35-3. Teeth 2,4-4,2, hooked withlittle, ifany, grindingsur-face.

Color greeuish, the scales above dark edged; a plumbeous

band

alongthesides,

which

does notform a distinct spotatbase ofcaudal; darkdots alonglateralline adarkvertebralstreak; finspale.

Thisspecies is

common

in theoutlet tothe

Comal

Spring at

New

Braunfels.

The

largestspecimenstakenarealittleover2inchesinlength.

Some

ofthese are

num-

bered 36529inthe U. S.National

Museum.

*Alburnops illecebrosus type. (Phila. Acad.)

Head

4^; depth 4^. D.8. A.9.

Scales 6-36-3. Teeth2,4-4,2, littlehooked, with narrowgriuding surface,andthe edgesofthefirstveryslightly crenate. Thirteenscalesbeforedorsal.

Eye

3fⁱⁿhead.

Snoutrounded, 4iinhead.

Mouth

oblique; upperliponlevelof pupil. Maxillary 3finhead,reachingfrontofeye. Colorpale, avery brightsilvery

band

alongsides, aboutaswideas eye. (Meek.)

^The

types ofCtjprintllaumbrosahave32to35 scales inthelateral line.

They

are doubtlessidenticalwiththe prior-namedbubaliuus.

•^Thetypes ofC.gunnisoniseemtobethe

young

ofA^.bubalinus. Lat.1. 34.

^Cypriuelia beckwithiseemstobeidenticalwithC.timbrosa;thedifferencesnoticeable seemto bedueto the small sizeofthe specimen of C. beckwithi examined. Scales 7-34-4. (Meek.)

(7)

124 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

[1885.

Name.

(8)

1885.]

PEOCEEDINGS OP UNITED STATES NATIONAL MtJSEUM. 125

Name.

Identification.

*

Moniana

deliciosa^•.

*

Moniana

proserpina*^.

*

Moniana

aurata*

Moniana

complanata

t

Moniana

IsBtabilis''.

*

Moniana

pulcbella^.-

*'

Moniana

frigida^{^}. t

Moniana

of theAcademy.

Length

2inches.

Head

:3|^;depth4. D.7.,A.7. Fourteenscalesbeforedorsal. Scalea 6-35-3.

Eye

4inhead;snoutblunt,3Jⁱⁿhead;

mouth

subinferior,nearly horizontal;

upper on level oflower edge oforbit.

Top

ofhead rather convex,with a slight

median

crest.

Body

rather robust; the ventral outline nearlystraight; the

back

elevated. Color brownish above,rather silvery on sides and below, but with no evidentsilvery lateral band.

A

blackish metallic

band made

upofdark punctula- tionsrunningfromupper edgeof preopercletoupper edgeofbase of caudal.

This is identical with the type of Moniana auraia(118 S.I., from Piedrapainte, N. Mex.). (Meek.)

'

The

specimensofMoniana aurata are tuberculate males, apparently of the

same

species asthetypes ofMonianaproserpina.

Compared

with N.lutrensis,N. proserpina has the

mouth

smallerand

more

inferior,the snoutand headheavier

and

moreobtuse, and the bodyrather less deep.

The

males

show

a dusky humeral bar, as in

M.

lutrensis,

and

afaint,dusky, horizontalstripe.

*MonianaIwtabilis {S. I.,120,

Hurrah

Creek, If inches long)seems to be indistin- guishablefromthe

young

ofiV^.lutrensis.

Head

mens

ofgracilisarealso inthe National

Museum. They

seemalittleslendererthan theaveragelutrensis,but probablyallbelongtothatspecies.

*Moniananitidaseemstobe a validspecies allied toNotropisdeliciosus.

A

descrip^

tion willbegivenelsewhere.

^Monianaformosa(114S.I., RioMimbres) seemstobedistinctfromallofthe other species.

Head

_3f; depth 3^. D.^8. A.8. Scales 7-43-4; 23 scales before dorsal.

(9)

126 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

[1885.

Name.

Moniana

gibbosa Monianatristis

*Eichaidsoniuslateralis

*Lnxilu80cci(lentali8, (B. &G.)'

*Luxilusleptosomus^- Luxilus seco^{-^}

tLuxihis lucidns'*

*Semotilusmacrocephalus

*Semotilus speciosus

tTiarogacobitis^"' Gila(species)^{^'} Tigouia(species)^{"^}

Cbeouda

(species)*^

Identification.

Notropislutrensis,(B.

&

G.).

Notropissp.

Eicbardsouiuslateralis,(Grd.).

Luxiliuusoccideutalis, (B. &G.).

Noteuiigouuscbrysoleiicus.

Notemigonus?cbrysoleiicus.

Notropis umbratilis, (Grd.).

Semotilus atromaculatus, (Mitcb.).

Semotilus atromaculatus,(Mitcb.).

Tiarogacobitis, (Grd.).

Gila(species).

Squalius (species).

Squalius(species).

Eye

_3iinbead,sligbtlylongertbausnout. Snout formedas inX.hdrensis;tbe

moutb

oblique. Maxillary 3iinbead, reacbiug pastfrontoforbit.

Form

fairlyrepresented in Girard's figure, buttbecaudalpeduncleratber moreattenuate.

Some

blackisb dots along tbeposteriormargin ofeachscale; adusky

band mixed

witb silvery along sides.

A

brownish spot as large as pupil on base of caudal.

Teeth4-4.

^Luxilinus, Jordan; type Ltixilinus occidentalli, B.

&

G. This genus is allied to Notemigonus,difiering in havingthebelly

nowhere

carinated, the ventrallinebehind ventral fins beingcoveredwitbordinary imbricated scales. Teeth .5-5,with entire edgesandstrong grindingsurface. Gill-rakersslender,ofmoderate length. Intes- tine short,but

more

elongatethanin Xotropis.

-Thetype oi Luxihis leptosomus is in

bad

condition. It is not evidentlydifferent fromNotemigonuschrysoleucus.

^Thetype of Luxihisseco(intbe

Academy

at Philadelphia)isa

young

Notemigonus not evidentlydifi'erentfrom N.chrysoleucus. It hasA. 13or14; lat.1. 55; teeth 5-5

mouth

verysmall; lateral linedecurved; a

dusky

spotatbase of caudal.

"•Two specimens(5(iS. I.,3^ inches long) of Luxihis lucidus,Girard, areintbemuse-

um

ofthe

Academy. Head

4; depth3|. D.8;A.11. Scales 7-40-3; 25scalesbefore dorsal. Teeth 2,4-4,2,with oblique grinding surface. Ventral line covered with

scales.

Eye =

snout,3f ⁱⁿhead. Insertionof dorsal

midway

between base of caudal,a point just behindtipof snout. Lateral line decurved. Scales before dorsal

much

crowded..

Mouth

oblique,the maxillaryreaching front oforbit, 3^ in bead.

Baseof anal1^ inhead. (Meek.)

This species is apparently identicalwith Notro2yis umhraVilis,described from tbe

same

region.

*

A

type of Tiarogacohiiis, in thePhiladelphia

Academy,

has been examined

by

me.

The

genus is evidently a valid one, and verydistinct from Notrojns,approaching mostnearlytoEhinichthys.

The

followingare

my

^notes ontbe s])ecimen examined:

Body

decidedly elongate,loach-like, snbfiisiform, little compressed, covered with minute scales.

Head

small, subconjcal, depressed.

Moutb

very small, terminal, oblique, without barbels, the maxillary4 inbead, not reaching nearlyto eye. Pre- maxillary notprotractile. Lipsfleshy.

Lower jaw

included.

Eye

moderate, placed high,nearly

midway

inbead,its length 3| in head. Isthmus very wide. Ventrals sligbtly in advance ofdorsal. Fins all high, tbe first (rudimentary) ray of dorsal

somewhat

enlarged. Pectoralsreachingventrals; ventralspastfrontofanal.

Head

4finlength: depth6. D.8,A.7. Lat.1.60to70 (not tobe countedexactly). Teeth apparently1,4-4,1, extremelysmall,apparentlywithoutgrindingsurface.

•^I here omit all reference to the species of Gila, ^{'^}Tigoma,"and ^{'^}Cheonda,"not havingyet re-examinedGirard'stypes, and having thereforenothing toaddtothe account giveninthe Synopsis.

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