Note on the occurrence of <I>Stricklandinia salteri</I> and <I>S. davidsoni</I> in Georgia

48 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM.

straight ornearlyso; lowerborder slightlyconvex

and

longerthanthe nipperborder; posteriorborder nearlystraightorslightly convex,trun- cating the shellobliquely

downward and

backward, meetingtheupper borderata

more

orless distinct obtuse angle

and

thelower border

by

an abruptcurve. Surface

marked by abundant

coarselines

and

imbri- cationsofgrowth,whichtraversetheshell in slightlycurvedlinescorre- sponding with theposterior border,

and

is apparentlywithouttrace of

any

radiating lines orribs.

Entire length from beak to postero-basal extremityabout 215 milli- meters; breadth, from the postero-dorsal extremityto the base, meas- ured at rightangles with theupperborder,95millimeters.

This shellis sounlike

any

described

American

speciesthatnodetailed comparisonwith

any

of

them

is necessary; butitisso closely related toP. legeriensisd'Orbignj^,from thedepartmentof Sarthe, France, that

itisnotwithout

some

hesitation thatI have decidedtopropose asepa- ratespecific name. Ihave never

had

an opportunityto examine

any

of the few examples of P. legeriensis that have teen discovered,

and

my

comi:)arisons are therefore only with the description

and

figuresof d'Orbigny, in Pal. Frangaise, Yol.Ill, p. 257, pi. 334.

From

these it

appearsthatourshell differs fromP. legeriensisin the followingparticu- lars.

The

angle ofdivergenceofthe npi)er

and

lowermarginsisnot so great, inconsequence of which thebreadth of the shell is not propor- tionally sogreat; the curve

by

which the i)osterior border meetsthe lowerborderis

more

abrupt,

and

thegreatesttransversediameter ofthe shellis nearilie

median

lineinstead ofbeing

much

belowit,asitisrep- resented tobeinP. legeriensis.

The

internal

median

grooves

upon

each valve, and alsothe undulations ofthe lowerborder,mentioned

by

d'Or- bigny, appearto beentirely wantinginourshell.

Pjositionand locality.

—

^{Cretaceous strata; about li miles southwest-}

ward

from Fort

Win

gate, ISrorthern

New

Mexico,whereit

was

^collected

by

Mr.

James

Stevenson, in whose honorthe specific

name

is given.

WASHmaTON,

D.

C,

February15, 1880.

NOTE

OlS

THE OCCURRENCE OF STRICIttrANDINIA SAliTEKI AND

S. I>AYBI»»$ONS BN

CEORGIA.

By

C. A.

^WEflTE.

A

few

months

ago Lieut. A. Vv". Yogdes, United States

Army,

gave

me

afew fragmentary fossils froma collection which he

had

thenlately

made

at Taylor's Eidge, in the

town

of Ringgold, Catoosa County, Georgia.

The

other fossils of this collection

and

the geology of the regionreferred towere discussed

by

Lieutenant

Yogdes

in the

Decem-

ber, 1879,

number

of the

American

Journal of Science

and

_{Arts, pp.}

475-477.

He

there refers,

and

doubtless correctly, the horizon from which heobtained the fossils hegave

me

to that of the Clinton Groui^

PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 49

of

Kcw

York.

They

areinthe condition of natural casts infine-grained sandstone,but I have quite satisfactorily identified a dorsal valve of StrieJdandiniasaltcri

and

oneofS.davidsoni Billings. Ifthese

two

spe- cies are correctly identified, as they apjiear to he, their discovery iu Georgia isespecially interesting,because theyhavehithertobeen found onlyinstrataoftheislandof Anticosti;

and

alsooftheindicationwhich they

and

their associates in the

two

regions

named

afford as to the equivalency of the Georgia, Clinton, Anticosti strata iuAmerica;

and Upper

Llandoverystrata ofGreatBritain.

WASHiNaTON,

D.

C,

February 15, 1880.

BESCRIPTIOIV OF A NEW^ FliOUIVDER

(B»l.ElTK©IVaCIITHVS

VERTI-

CAliS!^),

FROM THE

COA^^T

OF CALIFORNIA, WITH

IVOTE!>i OIV

OTHER SPECIES.

By DAVID

S.

JORDAN

^aaad

CB5ARI.ES M. GII.BERT.

Pleuroiiichthysverticalissp.nov.

Form

broad ovate, the outlines regular; head small,

somewhat

^con-

stricted behind the upj)er eye; eyes large, but smaller than in P.

quadrifuhercidatus. luterorbital ridge narrow; a small tubercle or prominence in front of the upper eye; a large one in front of upper edgeof lower; another larger

and

sharper at interior edge of the in- terocular space; anotherat theposterioredge of the interocular spine ridge. This latter is developed into a long, sharj), triangular spine, which is nearly as long as the pupil,

and

isdirected backwards.

A

I)rorainenttubercleattheposteriorlowerangle of theuppereye.

Upper

edgeofopercle

somewhat

uneven, butno other tuberclespresent.

Mouth

small, as in other species; the lips thick, with lengthwise

plicffi.

Teeth in a broad

band

on theleft (blind) sideof each

jaw

; no teeth on theright side in citherjaw. Gill-rakers very small,weak,

and

flex- ible, about ten in number. Scales essentiallyasin the other species, small, cycloid,imbedded,

and

scarcelyimbricated. Laterallinenearly straight,with an accessorybranch which extends tothe middle of the dorsal fin.

Dorsalfinbeginning

on

the blindside atthelevelofthe jiremaxillary, therebeingbut aboutfour ofits rayson theleftside ofthe medianline.

Vertical fins lesselevated thanin the otherspecies, the longest rays of the dorsal about half thelength of the head.

Anal

finpreceded

by

a spine. Caudali)eduncle short

and

deep. Caudalfinelongate,rounded behind. Pectoral short, nearly equal. Yentrals moderate, reaching anal spine.

Finrays: D. G5; A. 45.

Color dark olive-brown, withround grayish spots,the

body and

fins mottled withblackish.

Proc. Nat.Mus. 80 4

Hay

6, 1

§ 80.