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HARVARD UNIVERSITY.

LIBRARY

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MUSEUM OF COMPARATIVE ZOGLOGY

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AMERICAN

PALEON TOMOGY

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Novebmer, rorr — June, 1977

Harris Company
Cornell University, Ithaca, N. Y.
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But. No.

CONDTENRSFOR VOL Ve

22.—New Eocene Fossils from the Southern
Gulf States. By T. H. ALDRICH.....
23.—New and Interesting Fossils from the
Devonian of New York. By AXEL
OLSSON is. Serre Aeeeciece seca wesc ceite ss
24.—New and Interesting Neocene Fossils
from the Atlantic Coast Plain. By
(ASXGRSIe ss OSS ONG ecoer oe eree ee eee

25.—On a Restoration of the Base of the
Cranium of Hesperornis Regalis. by
RES Wee SEU eerarmente cm sentece:

26 —The Echinoidea of the Buda Limestone.

IBF Vel, We WWASDESNIS 4 22825. ccconcos5 5000506
27._New Miocene Fossils. By AXEL
OPSS ONG tas oases esto Soe ence aes

28.—The Murfreesboro Stage of our East
Coast: MioCene? i. oscsscleetsecceseeu eens:

29.—Santo Domingo Type Sections and
Fossils, Part I1.* By C. J. Maury...

30.—Santo Domingo Type Sections and
Fossils, Part I1.* By C. J. Maury...

Index to-Volume V_ .................. 0.000008.

27-65,

66-68,

Page 1-24

121-152

153-164

165-415

416-460
463-478

*Bulletins 29 and 30 were published in two sections each : No. 29,

Section 1 (through p. 284) published Mar.
(through p. 470) published May

Section I

31; Section 2) Apr. 29 No: 30,
29 ; Section 2, June 30, 1917.

Vaybe\

Vol. 5

BULLETINS
OF
AMERICAN PALEONTOLOGY

No. 22

f
NEW EOCENE FOSSILS FROM THE SOUTHERN
GULF STATES

T. H. ALDRICH

November 15, Iomr

Cornell Univ., Ithaca, N. Y.
Wa Saat
Harris Co.

;

NEW EOCENE FOSSILS FROM THE SOUTHERN
GULF STATES

BING

T. H. ALDRICH

The species described in this paper are mostly from Alabama.
They present some interesting forms, and new genera from our
Eocene. Nearly all of them are rare. The types are in the
cabinet of the writer. I am indebted to Miss. E. G. Mitchell
of Washington, D. C. for the very striking and accurate fig-
ures of nearly all the species.

DESCRIPTION OF SPECIES

Crassatellites (Crassinella) aldrichianus, Harris sp.
Blate ee ngs) 12

This little shell differs’ somewhat from the typical form.
It has a less crenulated basal margin ; the anterior dorsal mar-
gin is more arcuate. Associated with it is another form (see
fig. 3) which may take the name of C. clarkensis. It hasa
more regular dorsal margin, is coarsely sculptured, and has no
denticulation on the inner ventral margin. I am inclined to
leave it as a variety however.

Woods Bluff, Ala. Also 6 miles east of Thomasville, Ala.,
same horizon. :

‘

Cardium ( Trachycardium) clatbornensts. n. sp.

Plate I, fig. 4
Shell large, covered with numerous ribs which are square
in section and ornamented with close-set, triangular imbrica-
tions, all ribs being covered except in the umbonal region.
The sunken spaces between the ribs are not half their width

4 BULLETIN 22 4

and in the umbonal region show a series of riblets at right
angles following the growth lines. Inner basal margin dentic-
ulated. ‘The substance of the shell is thin, showing the ribs
in the cavity. The hinge was unfortunately broken.

Height 35 ; breadth 33 mm.

De Soto, Miss. Claibornian. .

Tellina (Angelus) prolenta, n. sp.

Plate vis sea 5

Shell small, rather compressed, inequilateral, posterior
longest, the dorsal margin descending sharply on the anterior
end, shell rather pointed, while the posterior is rounded ; hinge
normal ; exterior smooth, with a few faint lines of growth ; a
strong depressed area anteriorly running from beak to base.
Internally a slight rise drops from the beak to the ventral
margin ; muscular scars just perceptible.

Length 5 ; height 2 mm.

Claiborne Sand bed, Claiborne, Ala.

The anterior depression is the most noteworthy and dis-
tinctive peculiarity.

Tellina temperata, n. sp.

Plate I, fig. 6

Shell small, oval, moderately convex, inequilateral, reg-
ularly rounded, beaks very small, surface polished and mark-
ed with concentric lines separating rather broad interspaces.
Hinge normal ; right laterals rather strong. Muscular scars
distinct but shallow ; pallial sinus partially confluent.

Length 11; height 6 mm.
Gregg’s Landing, Alabama River, Ala.

This species resembles 7. subtriangularis, nob., somewhat
but is more regularly rounded, lacks the posterior fold and
the raised lines thereon.

5. ALDRICH, EocrNE Fossirs 5

Ervilia meyeri, 0. sp.

Blatewi nes, 7:

Shell small, nearly equilateral, surface covered with num-
erous close-set raised lines becoming somewhat coarser near
the ventral edge. Beak low but pointed. Interior polished.
Posterior muscular scar well defined, the anterior very faint.
Cardinals rather strong ; laterals doubled in the left valve.

Length 4; height 2.5 mm.

Claiborne Sand bed, Tombigbee River, Ala.

Named in honor of Dr. Otto Meyer, one our early work-
ers in the Eocene.

Akera texana, n. sp.

Plate II, fig. 1

Shell medium, substance extremely thin, surface smooth
except some wrinkles where the body whorl meets the sunk-
en spiral area. Strongly depressed ; whorls about five, very
sharply defined at the apical end with a slightly reflected edge.
Umbilical part bordered by a reflected edge.

Length 13; breadth ro mm.

Lower Claiborne Eocene of Smithville, Tex.

This is a new genus to our Eocene and rare no doubt on
- account of its very fragile shell. Several examples were obtain-
ed but all went to pieces on drying.

Scobinella newtonensis, n. sp.

Plate 1 fig

Shell rather solid, medium size; whorls nine or ten ;
apex slightly bent, embryonic whorls four in number in per-
fect specimens ; a raised line starting just below the suture
on the next whorl, which becomes more prominent on the
latter whorls, or roughly tuberculated ; the median part of

6 BULLETIN 22 6

the whorl starting with a .row of spiral and strongly mark-
-ed tubercles which gradually double and are somewhat in-
clined to the vertical axis ; just above this double series an-
other appears with tubercles twice as long spirally as high;
the fascicular surface very concave, marked by three or four
broad but dim spiral lines ; fasciole nearly semicircular ; body
whorl ornamented with numerous coarse tubercles set in spi-
rals also inclined to the axis ; outer lip striated within ; col-
umella nearly straight, slightly bent to the left at base ; cal-
lus thin, showing several spirals passing into the interior, one
on the central part almost might be called a plait.
Length 12; breadth of body-whorl 6 mm.

Newton, Miss. Lower Claiborne horizon.

Pleurotoma (Bathytoma) marieana, n. sp.

Plate II, fig’s. 3, and Plate III, fig. 1

Shell small, whorls six, the first smooth, the next with
spiral lines and a few faint axial ones ; body-whorl profuse-
ly ornamented, cancellated, the periphery of this whorl car-
rying three close-set spirals which give the appearance of a
raised, beaded line ; the space between the periphery and
the suture strongly concave aud carrying the retral sinus ;
suture distinct.

Woods Bluff horizon, six miles east of Thomasville, Ala.

This little species is represented by two specimens both
of them young. The figures do not show the periphery of
the body-whorl correctly.

Scobinella sculpturata, un. sp.
Plate II, fig’s 4, 5

Shell rather small, solid ; whorls eight, ornamented with
close-set ribs oblique to the vertical axis; suture bordered
above by a strong nodulous spiral ; body-whorl marked by
numerous spiral lines, which cut into the ribs much the
same as in Scobinella elaborata, Con. Sinus semicircular, car-

7 ALDRICH, EOCENE FOSSILS 7

ried on a concave plate or shoulder. Aperture smooth within.
Length 2; breadth of body-whorl 3 mm.
Hatchetigbee Bluff, Tombigbee River, Ala.

Bittium (Stylidium) anita, n. sp.

lace IOL, sey 6

Shell small, rather solid ; whorls seven to eight ; apex
pointed, embryonic whorls smooth, the balance with six or
more spiral impressed lines ; suture distinct, whorls slightly
shouldered ; aperture ovate spirally striate within ; columella
somewhat bent and reflected below ; canal slightly twisted.

Length of largest specimen 5.5 ; breadth 2 mm.

Six miles east of Thomasville, Ala. | Woods Bluff hori-
zon.

Thats clarkensis n. sp. .

Plate Ii fic. 2

Shell small, whorls six, the first three and a half smooth,
embryonic, the others marked by slight folds axially raised;
shell somewhat shouldered at the suture ; body-whorl expand-
ing rapidly ; outer lip bordered by a raised and reflected
process, flattened somewhat within and carrying a few rais-
ed but very small tubercles on the inner part of their edge ;
columella slightly concave with a constriction at the beginn-
ing of the canal which is is short, rather deep and bent to
the left ; callus rather strong, broken at base, exposing a
slight umbilicus, but probably in perfect specimens the um-
bilicus is covered. A few faint spiral spaces appear on the
body-whorl and the next younger.

Height 9; breadth of body-whorl 7 mm.

Woods Bluff horizon six miles east of Thomasville, Ala.

8 BULLETIN 22 8

Turbonilla (Mormula) mitchelliana, n. sp.
Platem Uber ineees

Shell medium ; spire smooth, embryonic whorls bent to one
side and partially immersed ; whorls nine, surface smooth, shell
shouldered at suture and compressed below same. Inner lip
reflected and bearing one fold ; outer lip sharp, striated with-
in. The body-whorl is large ; looking down on the shell from
the apex the suture seems to cut under the whorls.

Height 7.5 ; maximum diameter of body-whorl .2.5 mm.
Six miles east of Thomasville, Ala. Woods Bluff beds.

This species is about the size and shape as 7Jurbonilla an-
zta Aldr. but has no spiral lines, also carries a prominent fold
on the columella. Dr. P. Bartsch has kindly determined its
generic position. -

Eulima extremis, 1. sp.

Pate tiie hga a

Shell polished ; whorls nine or ten ; suture very shallow
showing indistinctly ; aperture elongate ; outer lip slightly sin-
uous ; inner lip reflected over the lower part of the pillar.

Length of longest specimen 7 mm.

Claiborne Sand bed on Tombigbee River about one mile
above St. Stephens, Ala. Also at Claiborne.

This species is longer than &. acculafa Lea, and more slien-
der, that species averaging about eight whorls, while this has
nine to ten. All specimens of this species show a broad con-
striction below the suture, and even retain some traces of a col-
or band there. The suture in Lea’s species is plainly marked.
Eulima lugubris Vea has a more circular aperture, a more thick-
ened and reflected columellar callus and is broader.

9 ALDRICH, EOCENE FOSSILS 9

Cerithiopsts greggiensis n. sp.

elle JOOL. ine 5

Shell small ; whorls rather rapidly expanding ; ornament-
ed with three .rows of tubercles which do not coalesce either
spirally or axially as in some specimens of the genus ; en-
tire surface covered with fine, close-set, spiral lines ; suture
deep ; base with spiral lines, some coarser than others; col-
umella smooth ; spiral lines superimposed upon the other or-
namentation ; row of tubercles just below and bounding the
suture composed of smaller and more closely set ones than
in the other two rows. The specimen is fragmentary.

Breadth of body-whorl 3 mm.
Gregg’s Landing, Alabama River, Ala.

Retusa clatbornensis, n. sp.

Jess JOC 36ye25

Shell small, showing lines of growth, not polished ; with-
out revolving striz ; spire sunken ; edge of the pit rounded
over, aperture longer than the body of the shell, narrow above,
widening below ; outer lip sharp, simple, straight, rounded
below, pillar twisted, ridged and somewhat reflected.

Length 2.5 mm.

Claiborne, Ala.; in the sand bed.

Odostomia (Pyrgulina) clatbornensis, n. sp.
Plate m Ve etioe at

Shell elongate-ovate ; nuclear whorls obliquely immersed
‘in the first of the post-nuclear turns ; post-nuclear whorls well
rounded, narrowly shouldered at the summit, marked by feeble,
slightly protractive, axial ribs which are best developed near
the summit and gradually decrease in size as they approach
the suture ; of these ribs 20 occur on the first and second,
and 26 upon the penultimate turn. In addition to the axial

IO BULLETIN 22 Io

ribs the whorls are marked by subequal and subequally spac-
ed, incised, spiral lines, of which 12 occur between the first
and second, and 17 upon the penultimate turn ; suture mod-
erately constricted ; periphery and the rather long base of
the last whorl well rounded, marked by the feeble extension
of the axial ribs and about 18 incised, spiral lines which
equal those of the spire. Aperture elongate-ovate ; posterior
angle acute ; outer lip rather thick ; columella short, curved
and reflected over the reinforcing base, anterior edge only
being free ; parietal wall covered with a thin callus.
Claiborne Sand bed; Claiborne, Ala.

The fold is faintly perceptible from the outside. Very
rare. Height 3.5 mm. This shell has a strong resem-
biance to Welania claibornensis Heilprin. ‘That species is rep-
resented with seven whorls and is more pointed, narrower, with
a much smaller aperture, judging from the figure of the type
with which I have compared this form.

Turbonilla (Pyrgiscus) agrestis, n. sp.

Plate IV, fig. 2

Shell small, only 5 whorls represented in type; surface
with four raised revolving lines, increasing to five on the
body-whorl , with the same number upon the base. There
are numerous raised axial ribs across which the spirals pass.
Umbilicus closed ; aperture ovate ; columella somewhat twisted.

Width of broken scecimen, r mm.

Hatchetigbee Bluff, Tombigbee River, Ala.

A strongly marked species ; quite distinct.

Levifusus trabeatus Con., var.
Plate V, fig. 3

This is another variation possessing a revolving row of
incipient spines at the periphery with another finer line below.
It is much more like Fulgur in shape and is evidently a con-
necting link. The outer lip is lirate within.

II ALDRICH, EOCENE Fossiis II

A variety of Levzfusus supraplanus Harris is also figured,
Plate IV, fig. 4, which rather connects the form with Fzsus
(Levifusus) sutert nobis, seems to be distinct from other forms,
yet these species vary so a lot may go into one basket eventu-
ally.

Levifusus pagoda, Heilpr., var.
Plate IV, fig’s 5, 6

Differs from all other forms described by its possessing two
raised, revolving lines, slightly tubercular. Specimen figured
is from Woods Bluff, Ala. It also occurs at Matthew's Land-
ing, Ala., in the Midway horizon, The variation in this and
other species of Levifusws are greater than generally recognized.
One form in my collection of this species has two rows of tuber-
cles at the periphery of the body-whorl. both equally prominent,
still another form has the single row at the periphery followed
below by five or more pairs of raised lines running in couples.
This form occurs at Yellow Bluff, Alabama River, Ala.

Plate IV, fig. 7 is another form that may equal Lezzfusus
indentus Harris, I have no doubt several of these so-called
species will be united upon future study.

LYRISCHAPA, nov. gen.

Shell medium; apex bulbous, the initial point below the
tip and buried in the same. Three other whorls, flattened
above, ribs becoming spinose above ; revolving lines numerous.
Inner lip lirate. Type described below.

Lyrischapa harrisi, nov. sp.
kee IOVS ine, oS

Shell medium ; Scaphelloid in appearance ; surface car-
rying eleven strong, elevated ribs which become spinous at
the shoulder ; surface also ornamented with numerous close-
set revolving lines, coarser near the base ; the entire inner lip
with lirze.

Length 18 ; width at shoulder 10 mm.

Three and one-half miles south of Quitman, Miss.

m2 BULLETIN 22 12

Lower Claiborne Eocene.

This shell is probably the same as figured and mentioned
bye Dr Dally (Azar saaacrictg whine MSEC AOU De 77k
6, fig. 5a). It is not a Voluteltthes, not a Caricella or Lyria,
but has.some common characters of all.

Szgaretus (Sigaticus) clarkensis Aldr.
Platerve tig i

A specimen is herewith figured that is more characteristic
than the type. All these forms including several called z-
naticina by Dr. Dall should be removed from Sigaretus etc.,
as they are Naticoid as first observed by Professor Harris.

Discohelix texana, n. sp.

Platem Vie tious eons

Shell small, whorls five, nucleus smooth, showing the same
as in Solarium ; the whorls following gradually developing three
rows of tubercles, those on the periphery doubled ; upper sur-
face flat, the space between the two keels somewhat concave
and smooth. the under part excavated somewhat and marked
with larger tubercles on the periphery besides a central row,
smaller and more rounded. ‘These tubercles on the base rapid-
ly grow smaller and disappear before reaching the umbilical
area.

Length and breadth about 3 mm.

Smithville, Tex. Lower Claiborne Eocene.

Chlorostoma nautiloides, n. sp.

Plate Vi, he's 4,5, 6

Shell small, whorls five, flattened above, rounded below ;
surface covered with fine revolving lines which are coarser on
the base ; ambilicus open, deep, with a revolving line proceed-
ing from the lower part of the aperture and revolving into the

1 ALDRICH, EOCENE FOossILs 13

umbilicus. Interior nacreous.
Height, 1.5 ; greatest diameter, 5 mm.
Claiborne Sand, Claiborne, Ala.

This little species may equal one of the species described
by DeGregorio, but all his species appear to be smooth.

Neritina unidenta, n. sp.

Je iletie WW eS Fg 8

Shell smooth, rather small, showing the epidermis and
a few lines of growth underneath. The spire is worn off.
Shell rather quadrate: outer lip sharp, inner lip flattened,
callus reflected, pillar bearing one large tooth curving down-
wards into the interior. The color markings are retained,
composed of close-set, dark brown broken lines, the entire sur-
face being covered.

Height 7 ; maximum diameter 8 mm,
Woods Bluff horizon, six miles east of Thomasville, Ala.

This is the first undoubted Eocene Verztina from Alaba-
ma, and is interesting because there is a living form in the
Coosa and Cahaba rivers of Alabama.

Neritina pupa Lin. from Cuba has also a faint fold in-
side the pillar lip, which rapidly disappears, probably absorb-
ed. eritina showalteri Lea has no dentition on the pillar.

Argyrotheca dallt n. sp.
elatis OW, eS G, LO

Shell quite small ; dorsal valve oval, exterior with about
fourteen folds radiating from the beak. Surface covered with
fine lines, andalso finely perforated ; within also finely perforat-
ed but the perforations do not seem to extend through the shell.
Median septum strong, elevated, reaching nearly to the base.

Height 4; width 4.5 mm.

14 BULLETIN 22 Pe

Hatchetigbee Bluff, Tombogbee River, Ala.

Dorsal valve only known. ‘This genus is new to our Eo-
cene.

ALDRICH, EOCENE FossILs

Explanation of Plates

Fig.

TONES

BULLETIN 22

PLATE I

Page
Crassatellites (Crassinella) aldrichianus Har...........-....,.. a
@riclarkensisy Aldea sese nec pee oes SRR a ROH RE RAN cere Bi
Cardium (Trachycardium) claibornensis Ald.................. a
Atel bras, (Avoyeqnilins)) jortovlernag BUG lon cocaccscasccasoccsdsencasenanese 4
dielilimatem pera tay All deereeene-seseeeeneeh eee reer ec ete eee ence eees 4
Envaltarmieyert Al dic.cow.d sec canecsececanae se acters eacnaen erences 5

VGESy BULL. AMER. PAL. NO 22 Real

‘
S
os

Fig.

Retusa claibornensis Ald

BULGE N22 18
PIL ANI, JO

Page

Avera tescartia AU sens Se Cia: ie gmee iin ata ete teat ate 5
ScopirrelilameytonensSisy Al Giese peers te tele 5
Pleurotoma (Bathytoma) marieana Ald.................. 6

, ScoOoimealle, genlhowmremz, AWCl 5. 5505000 soocosnconasscosoascee. 6
Bittium (Stylidium) anita Ald 7

NOTES 2V BULL. AMER. PAL. NO: 22; PL.

(

ioe

DIMOION ION

sor ee

Fig.

PRO YP w

BULLETIN 22

PLATE Il
Page
Pleurotoma (Bathytoma) marieana Ald...............scceeeeee 6
Phaisiclarkensis Ald o.s.ccss.g8ee ie nen ceeoeawemerceane ceceone een ese 5]
Turbonilla (Mormula) mitchelliama ..................:secceceeeee 8
Hulima jextremis Ald\n....-<cscccerccceeceeeeseweteeerroeceeccoes 8
sented soasacauoabnacteonne teacsebeneceeceeenaenee 9

Cerithiopsis greggiensis

Ries

NO. 22,

BULL. AMER. PAL.

VO trey.

Fig.

BULLETIN 22 22
PLATE IV
Page
I. Odostomia (Pyrgulina) claibornensis Ald..............cc0000000s 9
2. unbonillas (Pyteascus)) agrestis v Alc meses ann a eel eres if)
Be Levifusus trabeatus Con............ patibabiebe ele ote ceeei sai cleem gee e mene 10
4. Bevibusussupraplatius dela te..copyseeeee eter en near a eee eae II
jie Oe Mex noniGiey jon ore ey 1S (Uh 0} es ssadocusnucoacansdecdobapoosabecbaouesacandoc soe II
ae IP EAUETISOS THACIETTAS JELATE sn cososcdsnoscosnoasncess00basccbaosocoMaonS cue II
8. Lynischapa harrisi sAld 2... ie, sarcanren tec eachc eee ene II

VOL. V BULL. AMER. PAL. NOS 22 ne:

Fig.

Dy Be
4 - 6.
Fe Sb

9g, Io.

BULLETIN 22

PLATE V
Page
Segaretus (Sigaticus)iclarkensis All dim osppscheneciesesssasaceces te: 12
WiscolelixitexanavAl dig aecacsecenseseccece see eee LCR e Retest 12
EMlorostonramantiloides All deere ee eeereee rere pect eseee ee eees 12
Neritinaunidenta Ald) iin. .5.ces.ncadsanocaseottacsetsccerecopeetecees 13

Argyrotheca dalli Ald

VOL. V BULL. AMER. PAL. NO. 22, PL. 5

Vol. 5

BULLETINS
OF
AMERICAN PALEONTOLOGY

No. 23
NEW AND INTERESTING FOSSILS FROM THE
DEVONIAN OF NEW YORK

AXEL OLSSON

December 20 , Ig9r2

Cornell Univ., Ithaca, N. Y.
: WES Au
Harris Co.

Ae
He

NEW AND INTERESTING FOSSILS FROM THE DEVON-
IAN OF NEW .

AXEL OLSSON

The new crinoids described in this paper are from the Upper
Devonian rocks of southern New York, from which only a few
species are known. ‘This is due to the rarity of their calyces
since whole beds in the Portage and Chemung formations are
often entirely made up of crinoid joints and stems. Because of
their occurrence in sandstones and sandy-shales, the calcareous
portions of the fossils have usually been entirely removed by
percolating waters. From these moulds thus formed, beautiful
casts may be made by means of gutta percha. By this method
the most minute details may be reproduced, but unfortunately
these casts become brittle with age. ‘The phyllocarid Achinocaris
punctata (Hall) Whit., is mentioned because of its occurrence in
a new horizon. ‘The writer wishes to express his acknowledge-
ments to Professors H. S. Williams and G. D. Harris for the
loan of the crinoids and for various helpful suggestions in the
course of the work.

Trichotocrinus, n. Sub. gen.

Dorsal cup agreeing in all its characters with JMelocrinus.
Resting upon the upper sloping surface of the second (2nd)
costals are two rows of pentagonal shaped distichals which form
part of the dorsal cup. From these are continued free rays,
- which are united throughout their length and give off from each
fourth (4th) or fifth (5th) brachial plates, small biserial armlets
bearing pinnules. Further up in place of a pair of these armlets,
two lateral branched are formed which being oppositely arranged
and together with the main trunk produced a trichotomy. ‘The
lateral branches in turn give off from each fourth (4th) or fifth
(5th) brachial plates, armlets which appear to be uniserial and
which in turn give off pinnules. A deep vental groove is con-

2 BULLETIN 23 | 28

tinued up along the fusion of the rays throughout their length
and extending also into the two lateral branches.

Remarks on Trichotocrinus

The characters as given above show the intimate relation of
the form with Welocrinus. ‘The structure of the arms is however
very different and as in some other members of the family, is a
measure of the amount of evolution through which they have
passed. Because only a single specimen is known and that
with only one arm preserved, it has been considered advisable to
give it only sub-generic rank. The family J/elocrinide does
not survive the Devonian, being represented in the Sub-Carbon-
iferous by the closely related family Actinocrinide. For this
reason such variation from the typical Melocrinid arm is apt to
be looked upon as aberrant or regressive in nature. However, a
more ready explanation is found in considering it a natural re-
sult of evolution, which may be thought of as commencing with
Martacrinus and passing through J/elocrinus, two genera, which
differ from each other only in their arm characters. The pres-
ence or absence of interdistichal plates appears also to be a
measure of evolution, becoming eliminated as the arms become
more ridigly biserial.

In Mariacrinus, the arms are typically uniserial and bear arm-
lets, with pinnules only on one side. The next step is the
fusion of its uniserial arms in the production of biserial ones,
which commences proximally, finally extending throughout the
entire length of the arms. Species occur in which this fusion
has been but partially completed.* The complete fusion of the
arm give rise to the genus J/elocrinus (see Plate 6, figs. 4, 5, 6.)
With armlets arranged on opposite sides and which are usually
biserial.t ‘The last step in this evolution would necessarily be

*Martacrinus beecherit Talbot. Revision of the New York Helderber-
gian Crinoids. Am. Jour. Sci. 4th series, vol. 20, p. 25, 26. proximal
portion biserial only, uniserial portion longest, hence referred to A/aria-
Crinus.

+ Melocrinus pachydactylus Con. ‘Talbot, see above’ p. 27, states that this
species has uniserial arms and not biserial ones as previously described and
figured.

29 OLsson, DEVONIAN FOssILs 3

in the development of its armlets and which becoming concen-
trated in a pair of them resulted in the Zyicholocrinns type of
arm. This development has been attended by the formation of
secondary armlets along these two lateral branches and which
bear pinnules. Wesee then in this genus, a case where some
of the pinnules have developed into pinnule bearing armlets.
‘These armlets appear to be biserial although this point is not
clear, because of their poor preservation. This evolution as
traced above is also brought out when these forms are considered
in their relation to geologic time.

Trichotocrinus. Upper Devonian (Portage form).

Melocrinus. Silurian and Devonian.

Mariacrinus. Silurian and Lower Devonian.
Melocrinus (Trichotocrinus) harrisi, n. sp. Plate 6, Figs. 1, 2.

Specimen about medium size. Dorsal cup as high as wide,
spreading rapidly. Arms five biserial and developing three biser-
ial branches, which give off armlets bearing pinnules.

Plates slightly tumid and beautifully ornamented with well de-
fined ridges, those of the second series of plates passiitg from one
plate to another. From the radials a strong and well defined
ridge is carried up along the brachials, interruptedly at each
plate, and dividing the dorsal area into five nearly equal fields.
Because of the hexagonal shape of the plates, the ridges tend to
be in the form of six (6) armed stars, all the arms of which seldom
join in the center and never do on the radials, but are well marked
on the borders of the plates. Between these ridges are situated
small bead-like elevations. Suture line deeply grooved.

Basals four (4) forming a low cup and projecting beyond the
surface of the radials. Radials about as wide as high and hept-
agonal in shape, except the anterior one, which is hexagonal and
rest squarely upon the basal plate. Costals about as wide as high,
decreasing in size upwards and hexagonal in shape, except the
second costal which is heptagonal and supports on its inner face
the next order of brachial, the distichals. Distichals 2x10, those
of the same ray in contact laterally. First two rows of distichals,
pentagonal in shape, elevated in the center and with two small
bead-like elevation on the adjacent and opposite extremities, the

4 BULLETIN 23 30

others much smaller and plain. The trunk tapers upwards and
is deeply grooved along the fusion of the rays and which also ex-
tend into the branches. Armlets given off at every 3d, 4th or
5th brachial plate, those of the branches at each 4th brachial plate:

Regular interradials 1, 2, 3, and others above, more or less
hexagonal in shape and highly ornamented. The plates rapidly
decrease in size on passing upwards towards the ventral surface
and the shape varies.

Observations :

The specimen was found at the McGraw or University quarry,
which is situated in the center of the Ithaca formation of the Por-
tage series. It has been highly productive of rare and interesting
forms.

Melocrinus williamsi, n. sp. Plate 6, Fig 3.

Specimen about medium size. Dorsal cup higher than wide.
Arms five, biserial.

Plates tumid, with the centers of each, supporting a conspicu-
ous spiniferous node. ‘This applies not only to the plates of the
dorsal cup, but also to the plates of the vental surface and of the
anal tube. ‘The centers of the radials and brachials are connect-
ed by a ridge like elevation, which commencing on the basal
plates follows up through the radials and brachials, dividing the
dorsal cup into five equal fields. The interradials above the first
(1st) have their centers connected by a low ridge, which passes
from one plate to another, but is much less pronounced.. The
spiniferous node in the center of the radials and of the first (1st)
interradial plates is surrounded by a circle of low bead-like ele-
vations. a

Basals four (4) strongly tumid, those shown on the specimen
pentagonal in shape. Radials twice as large, those shown on the
specimen pentagonal in shape and as wide as high. Costals two
(2), of nearly equal size, but much smaller than the radials.
First (1st) costal hexagonal, second (2nd) heptagonal in shape
and both slightly higher than wide. Distichals 1x10 borne on
the inner surface of the second (2nd) costals, pentagonal ~in
shape and slightly higher than wide.

31 OLsson, DEVONIAN FOSSILS 5

Interradials 1, 2, 3,3. First (1st) interradial hexagonal,
slightly higher than wide, second (2nd) interradial irregularly
hexagonal, as are the remainder of the interradials. Plates of
the ventral surface small, apparently of an irregular hexagonal
shape.

Anal tubes long and composed of several small irregular
plates. ‘

Remarks :

This species is remarkable in its possession of the strongly
spiniferous character of its plates. In this respect the species
approaches Melocrinns gregert” Rowley from the Hamilton of
Missouri, which however has the spiniferous nodes, confined
only to the larger plates of the dorsal cup, as well as lacking the
ridge-like elevations extending through the radials and brachials
and the circle of bead-like elevations around the spiniferous cen-
ters of the radials and first (1st) interradials.

Observation :

This specimen is from the Portage rocks near Cortland, N.Y.

Melocrinus reticularis, n. sp. Plate 7, Fig. 1.

Shape pyriform spreading rapidly from the narrow base.
Basals strongly tumid only two shown on the specimen, anterior
one hexagonal, the other pentagonal in shape. Radials (three
shown) anterior one resting upon the hexagonal base, hexago-
nal in shape, the other two heptagonal, about as wide as high.
First (1st) costal slightly longer than wide and hexagonal in
shape. The second (2nd) costal axillary and heptagonal in
shape, supporting upon its two upper sloping sides the distichals.
Distichals 2x10 and incorporated in the dorsal cup. ‘Their shape
is not easily discernible because their sutures are indistinct.

Arms biserial (one arm is shown lying on its side embedded
in the rock) ; armlets appear to be given off from each third (3d)
brachial plate.

*American. Geologist., 1893, vol. 12, p. 303-304, fig. 1. In this paper
Rowley describes several species of Crinoids from the Devonian and Sub
Carboniferous rocks of Missouri; amongst these Melocrinus gregeri
which appears to have been later described by Wachsmuth and Springer
under the name of Melocrinus Calvint W+S. (Mem. Mus. Comp. Zool.,
vOleZinpy 300K pl 22 tia. 65 1 1897%,)

6 . BULLETIN 23 32

Commencing on the basals, a groove is continued up through
the radials and costals, branches into the distichals on the second
(2nd) costal. Plates with the exception of the basals flat, the
radials and brachials only slightly convexed by the longitudinal
groove. Plates ornamented with raised lines, radiating in pairs
or by threes from, but not showing in the centers of the plates.
‘These limes pass across the sutures of the plates. Sutures dis-
tinct only between the lower plates of the dorsal cup, becoming
very indistinct on passing upwards. Beyond the third series of
interradials the sutures are not visible, the lines of ornamentation
on the p'ates becomes single, producing a net-like appearance.

First (1st) interradials hexagonal in shape, longer than wide,
and supported on the upper sides of the radials and first (1st)
costals. ‘These are followed by the second (2nd) series of inter-
radials consisting of two plates which are irregularly hexagonal
in shape and wider than high. The third (3d) series of inter-
radials consist of three (3) plates. Above this series the suture

“lines becomes ind‘sticnt.

Radials, first (1st) costals, first (Ist) and second (2nd) interradials
have ornamentation lines of three (3) each, the two lateral ones
shorter than the middle line and passes nearly to the middle of
the plates. Other plates have only one ornamental line passing
across the sutures of the plates.

Observations :

This specimen is from the McGraw quarry zone from which
Trichotocrinus harrissi n. sp. was obtained.

Summiary of known species of Melocrinidae from the Portage

formation.
Melocrinus clavkei (Hall) Williams.

bainbridgensis (Hall) Whitfield.
williamst n. Sp.
reticularis n. Sp.
( Trichotocrinus) harrisi n. sp.

In the Chemung rocks at Chemung Narrows and various other
localities is found a large species of Melocrinid crinoid whose
stem is often several feetin length. ‘The head of this crinoid has

33 Orsson, DEVONIAN FossIis 7

never been described, but the characters of the stem seems to
place it in this family.

Echinocaris punctata (Hall) Whitfield Plate 7, Figs. 2, 3, 4.

Thies species, of which two individuals were found associated
with Spirifer mesastrialis and Cryptonella eudora, was collected in
the Ithaca shale beds of the Portage formation, as they are ex-
posed in the McGraw or University quarry, which is situated at
the lower end of the Cornell Campus. Comparison with forms
from the Hamilton show no characters to distinguish the two
from each other. It is interesting to note its appearance in higher
beds, associated with recurrent Hamilton species, and as having
changed but little in the time interval.

Fig. I.
23,
Be
4
5.
6.

BULLETIN 23

PLATE 6

Melocrinus ( Trichotocrinus) harrist n .sub-gen. and sp.
Dorsal aspect of calyx.

Ventral view showing trichotomous branching.

MHBOGEDUS. THU GTTISE,, To SFO>cdocss.co vocceacessescocacenco0teec6e 08
Dorsal view, showing a portion of the anal tube.

Mariacrinus showing uniserial arms.

Melocrinus showing biserial arms. Fig’s 4 and 5 are
from Wachsmuth and Springer.

Trichotocrinus showing branches of its biserial arms.......

NO. 23, PL. 6

BULL. AMER. PAL.

VOEZ 5

i 4
0 i
fig a
1 Be te

Bale
Ail

14 BULLETIN 26 38

PLATE 7
Page
Fig. 1. Melocrinus reticularis, 1.SPp...-...eccveeeeseeecceseneceneescenentecens 5
Exterior impression of dorsal cup.
2. Echinocaris punctata (Hall) Whitt............2...eeeeeeeeseeeeeee 7
Valve from Ithaca beds.
3. Echinocaris punctata(Hall) Whitf. Exterior impression.. 7

Cast of specimen shown by Fig. 3.

VOL. 5 BULL. AMER. PAL. NO. 23, PL. 7

Path ay hyas

Then Et Pa

ae
;
fas
=Ty
RNs Oh Aa al

Vol. 5

BULLETINS
OF .
AMERICAN PALEONTOLOGY

No. 2 4
NEW AND INTERESTING NEOCENE FOSSILS
FROM THE ATLANTIC COASTAL PLAIN

AXEL OLSSON

December 7, I9T4

Cornell Univ., Ithaca, N. Y.
Us S.vA:
Harris Co.

NEW AND INTERESTING NEOCENE FOSSILS FROM

THE ATLANTIC COASTAL PLAIN

Content: Lxtroductory remarks — Description of new species —
Changes in specificnames — Noles on the correlation of
certain Miocene beds in the James river valley

INTRODUCTORY REMARKS

During the past summer (1914), six weeks were spent with
the cruiser Ecphora, under the personal direction of Professor G.
D. Harris, in studying the Miocene formations as exposed along
Chesapeake bay and in the James and York river valleys, Virgin-
ia. Asa result of this work, a large amount of Miocene materi-
al was collected ; and it is from this source and from the material
collected on similar expeditions in 1896, 1897 and 1898 that the
following species were obtained. These new shells are from the
following states, viz., Virginia, North and South Carolina and
Florida. <

I, moreover, take this occasion to make a few changes in the
names of certain Miocene shells which have been found to be pre-
occupied. Lastly, I wish to make a few remarks concerning the
correlation of certain Miocene beds in the James river valley.

I wish here to thank Professor Harris for the very numerous
favors received during my Tertiary work. Ney

Paleontological Laboratory,
Cornell University,
December 1, 1914
AXEL OLSSON

45 OLsson, NEOCENE FOssILs 7

DESCRIPTION OF SPECIES

Nassa cornelliana, n. sp., Plate 4, Fig. 11

Shell small, heavy, elongate; with three and a half smooth
nuclear and four subsequent whorls; suture appressed; the first
sculpture to be introduced is a transverse ribbing ; this is soon fol-
lowed by four impressed revolving lines ;on the body whorl the
transverse sculpture consists of seven or eight large, thick ribs, and
these are continued in the same line across the earlier whorls, in-
terrupted at the suture; on the body whorl the transverse ribbing
is crossed by about nine impressed revolving lines which on the
middle of the whorl are separated by wide bands but become more
crowded at the base and next to the suture; on the earlier whorls
only four revolving lines are present; the ribbing is made only
slightly nodose by the revolving lines and there is no pronounced
shoulder to the whorls; canal short, straight, with numerous re-
volving lines and separated from the rest of the shell by a moder-
ate sinus; mouth subovate in shape, with a small sulcus at the pos-
terior commissure; outer lip thickened and with about seven lire,
which alternate in strength; pillar lip callous, smooth and with a
raised border; siphonal fasciole strong.

Fleight 5, greater diameter 2.5 mm.

This species is characterized by its elongate shape, impressed
revolving lines and the strong, transverse ribbing. Its nearest
related form appears to be WV. caloosaensis Dall, but differs from
that species in its more elongate form, lack of the shoulder on its
whorls and its larger size.

Duplin Miocene(?) ; Currie, N. C.
Lirosoma sulcosa, var. multicostata, n. var., Plate 5, Fig. 13

Shell of the general shape of C. su/cosaCon., but usually
smaller, with the anterior canal more produced ; body whorl two-
thirds the length of the shell : surface of shell strongly sculptur-.

8 BULLETIN 24 46

ed with 9 to 11 raised revolving ribs, separated by as wide or wid-
er interspaces ; on the body of the whorl the ribs become more
numerous, also finer on the anterior canal ; the suture, bordered
by a flattened area which generally carries a single carination ;
the revolving lines are additionally crossed by wave-like lines
which are parallel to the growth lines and cause the carination of
the ribs.
Fleight 20, greater diameter rz mm. (Specimen figured)

This shell when not full-grown appears perfectly distinct.
In its later development the shell does not increase much in height
but becomes more globose, like the typical form. It is then dis-
tinguished by its more numerous revolving ribs and in having
generally the flattened area next to the suture with a carinated
line.

Yorktown formation : Kingsmills, Grove Wharf

Typhis harrisi, n. sp., Plate 2, Figs. 7,9

Shell of moderate size ; whorls polished; whorls about 5,
with 4 large, thick varices, which on the body whorl extend com-
pletely across the whorl and onto the anterior canal ; between
these are shorter varices which continue only to just below the
middle of the whorl; the varices carry on the shoulder of the
whorls a hollow, recurved spine ; these are generally broken off,
and represented only by hollow stumps; whorls above the
shoulder are irregularly flattened and with the suture appress-
ed; on this area only the smaller varices continue across
to the suture; surface of shell smooth with only growth lines
which extend up onto the spines ; the varix next to the mouth
carries about four raised ridges which are placed at right angles
to the aperture; on the body whorl resting marks are indicated
by raised lines between the varices and representing the aperture
and each of the larger varices have on their summit a wavy line
formed by raised ridges corresponding to those at the aperture ;
canal broad and flattened, recurved and ending in a hollow stump
which probably represents the base of a recurved spine ; aperture
round or subovate with a raised rim.

Fleight 20, diameter 13 mm

47 OLsson, NEOCENE FOSSILS 9

This 7yphis is distinct from the other representatives of the
genus in the Tertiary. The species finds its closest related forms
in the Oligocene and Pliocene of the Floridian region.

Florida ; Miocene of the upper bed at Alum Bluff.

Pyrula jamesi, n. sp., Plate 5, Fig’s 14-16

Shell small, globose, moderately heavy; whorls about five in
number ; the last or body whorl large, inflated and covering a
little more than two-thirds of the preceding ; spire pointed ; sur-
face sculptured with plain raised revolving ribs, separated by
broader interspaces ; revolving ribs about 22 in number ; these
are regularly spaced on the body whorl but become smaller and
more irregular on the anterior canal ; suture bordered by one of
these ribs, and separated by a broader interspace than usual ; in-
terspaces with fine, raised and closely spaced lines which are par-
allel to the growth lines; mouth large; canal slightly oblique ;
coluniella more or less callous.

Length of type 12, diameter 7.5 mm.
Length of the larger specimen 13.5, diameter 8.5 mm.

From the Maryland Miocene another species of this group
was described by Martin as Pyrula harrist. This is a Calvert spe-
cies and characterized by its shorter spire, and much more nu-
merous finer, revolving ribs.

Yorktown formation , James river at Kingsmill.

Solariella shacklefordensis, n. sp.. Plate 5, Fig’s 5,6

Shell of medium size, pearly ; whorls about six in number ;
nucleus very small; earlier whorls with two carinated ribs, one
at the angle, the other about the middle ; upper surface of whorl
smooth and with oblique wave-like undulations which cause the
granulation of the revolving ribs ; suture of the later whorls grad-
ually advancing down so that additional revolving ribs and lines
are brought to view ; on the body whorl a smaller faint revolving
line is introduced between the two carinated ribs; in addition
there are two plain ribs below the carinated ones, the lowermost
being the largest ; base of shell with about five revolving, plain
ribs; umbilicus deep and bordered by a strongly carinated rib ;

IO BULLETIN 24 48

interior of umbilicus smooth with a single revolving line and
crossed by transverse ribs.
fleight of type ro, diameter ro mm.

A second species of So/arzella is found commonly at various
localities in the Yorktown formation in Virginia and which I have
identified with Tuomey and Holmes, 7vochus gemma. I have fig-
ured a specimen from Grove Wharf on Plate 5, fig’s 7, 8, 9. Dall
in his Tertiary Geology of Florida units with Toumey and Holmes
species the recent Lzotiza tricarinata Stearns, under the name ot
L. gemma. L. tricarinata is also a Miocene shell. I have speci-
mens from Wilmington, Magnolia, Neuse river, N. C. This
last-mentioned species is typically much smaller, generally with a
smooth base or at least with only faint revolving lines and lastly
with a strong carina bordering the suture. Solariella shakleforden-
sts may be distinguished from S. gemma in having only two strong-
ly carinated, ribs more numerous, smaller, plain, revolving lines.

St Mary’ s formation (?), Shakleford, Va.

Teinostoma (Solariorbis) variabilis, n. sp., Plate 5, Fig’s 1-4

Shell small, solid, rather depressed, but with a slightly point-
ed spire ; umbilicated ; whorls 4, enlarging uniformly ; periphery
of last whorl, slightly angulated ; suture impressed ; sculpture
variable, consisting of simple riblets, crossed by oblique, spi-
ral strize ; on the earlier whorls, these riblets are most pro-
nounced, becoming gradually obsolete and wave-like on the later;
spiral striae persistent ; in some cases the riblets may also con-
tinue over a larger portion of the later whorls than usual ; base of
shell strongly sculptured, the riblets being here persistent ; in old
shells a gerontic stage is introduced, coming after a resting stage
and this is characterized by an entire lack of sculpture ; aperture
rounded or slightly oblique, and with the edge bordering the um-
bilicus thickened ; umbilicus deep, not bordered by a ridge or
carina.

Greater diameter 2, height r mm.

This species is characterized by its variability. From 7. zz-

49 OLssON, NEOCENE FOSSILS II

dula Dall and 7. greensboroense Martin the species may be distin-

guished by its lack of the carina which occurs on the periphery

of those shells. It is probable.that H.C. Lea’s Delphinula

obligue-striata belongs in this genus. This last-mentioned species

has the radiating ribs divided into 2 or 3 branches near the peri-

phery, with the umbilicus bordered by a slight, carinated line.
Yorktown formation , Yorktown, Va.

Pecten (Pecten) smithi, n.sp., Plate 4, Fig’s 1, 2

Left valve small, thin, flat with a slight depression at the
beak ; shape ovate, as high as broad ; ribs about 20 to 22 in num-
ber, low and separated by flat interspaces, about twice as wide as
the ribs ; ribs becoming obsolete on the anterior submargin (and
probably also on the posterior) and are here replaced by a rather
prominent ridge ; ribs and interspaces at first crossed by concen-
tric lamellose lines, which also pass over the submargins and on-
to the ears ; these concentric lines are equally spaced and the lam-
ellaze appear to have been originally roof-like, passing from one
line to the other ; this concentric sculpture is developed for a time
and then suddenly ceases, the remainder of the shell having only
the ribs ; interior of shell smooth, lirated by the ribs.

fleight 26, apparent width 29 mm.

The above description is based on two imperfect left valves.
Both are from Kingsmill, Virginia. On the smaller shell, the con-
centric lines cover the entire shell. On the larger this sculpture
is lacking from the basal part, having disappeared suddenly at a
time when the shell had reached the same size as the smaller shell.

Yorktown formation, Kingsmill, Va.

Pecten (Nodopecten) vaccamavensis, n. sp. Plate 1, Fig. 1

Shell rather large ; valves of moderate but equal convexity ;
left valve with about seven narrow, elevated ribs which are slight-
ly nodose at more or less equal radial distances from the beak ;
interspaces very wide and with about 4 or 5 longitudinal lines
which are made slightly setose by the equi-distant, elevated, con-
centric lines ; anterior and posterior marginal slopes, abrupt ; ears
flat, with narrow riblets, slightly imbricated by the concentric

12 BULLETIN 24 50

lines which are here rather closely crowded. Left valve (not
well preserved in type specimen) with seven or eight very wide
ribs, separated by narrow and deep interspaces.

Length 70, width 68, thickness 18 mm.

The specimen above described is from the Cornell Univers-
ity collection and labelled as Miocene of Lake Waccamaw, N. C.
When more is known concerning its exact stratigraphic posi-
tion the species may prove to be Pliocene, as is also the case with
Modiolus gigantoides, The specimen is not well preserved, being
a large cast, with a portion of the shell of the left valve still re-
maining. Three of the ribs are much more prominent than the
other four, but apparently all were introduced at about the same
time. These three ribs, together with the rather angular submar-
gins, give the shell a quinquecostate appearance.

Miocene (?), Lake Waccamaw, N.C,

Modiolus pulchellus, n. sp., Plate 4, Fig’s 12-14

Shell small. smooth, convex ; beaks low ; anterior end very
short, posterior slope even, not depressed ; posterior end of hinge
line evenly rounded into the base ; anterior margin with a slight-
impressed zone ; surface smooth, with incremental concentric lines
which are occasionally deep and then represent resting stages ;
ligamental sulcus deep and narrow, with finely crenulated edges.

Length 9, width 6.5, thickness 3.5 mm.

This species in its general shape recalls J/. szlicatus Dall (as
M. tampaensts, P\. 27, fig. 28) of the Upper Oligocene of the silex
beds at Ballast Point ,Florida but is a smaller shell. The posterior
extremity in JZ. szlicatus according to Dall’s figure appears to be
slightly depressed and with the anterior margin wide and flat. In
the Miocene shells the anterior margin carries a small tooth-like
projection. The crenulation of the ligamental sulcus is also a con-
stant character and is well-marked in both valves. Shell generally
thin but occasionally quite heavy with deep muscle scars.

Yorktown formation : Kingsmtll (type), Grove Wharf.

51 OLsson, NEOCENE FOSSILS 3

Modiolus gigantoides, n. sp., ; Plate 2, Fig’s 1-3

Shell large, heavy, convex, elongated ; beaks placed rather
near the anterior end of the shell ; anterior end narrow ; shell
highest just about the middle ; posterior end acutely rounded ;
dorsal margin straight and deflected at an angle of about 30° ; an-
terior portion with two well-marked depressions extending from
the beak to the basal margin, and witha prominent ridge be-
tween ; surface marked with coarse lines of growth with little or
no signs of resting stages; anterior end slightly projecting be-
yond the beaks, with thickened lamellar margin.

Length 98, height 50, thickness 39 mm.

This species is characterized by its large size, convexity,
heavy shell and the lack of the prominent, impressed, dorsal area
of W/. ducatelli Con. From M7. gigas Wagner to which it is al-
lied most closely, a marked difference isfound in its much less
expanded posterior end, greater convexity and less pouting anter-
ior end.. MW. gigas has for some time been considered as doubt-
ful because of its rarity and abnormal appearance. Last sum-
mer, however, asingle, more or less imperfect specimen of a Aod-
zolus was collected at Yorktown which agrees in all essential char-
acters with the figure of 7. g7gas except in the matter of size, the
specimen measuring 65 mm. in length. This shell possesses the
wide, expanded posterior end but lacks the less pouting anterior
end.

Miocene(?), Lake Waccamaw, N. C,
Lithophaga yorkensis, n. sp., Plate 2, Fig’s 5, 6, 10

Shell small, thin, in shape more or less like Lzthophaga aris-
tata Dillwyn but differs in being constantly shorter and in lack-
ing entirely the twisted process which projects from the posterior
end of that species ; surface smooth, with only very fine growth
lines and occasionally incised lines, representing resting stages ;
a ray extending from the posterior end of the shell to the
beak along which the resting marks are well developed ; five
or six discontinuous faint raised lines extend from beak toward
basal margin in a posterior direction ; shell loosely surrounded

14 BULLETIN 24 52

by a calcareous deposit, terminating in siphonal tubes.
Length 14, height 6, thickness 5 mm,

This species is quite different from the other described Mio-
cene Liothophagus. L. subalveatus Con. has a wide medial furrow
and obliquely produced posterior end. L. zonenszs Glenn is charac-
terized by its broad posterior portion. ZL. yorkenszs on the other
hand shows relations with the recent Z. avistata Dillwyn, as indi-
cated above. In the case of the recent shell, the posterior extremi-
ty is twisted and attached to the calcareous shell which surrounds
it. The Miocene shell is perfectly loose as shown in figure Io, Plate
2. Conrad appears to have had a specimen of this species, as a
fair but characteristic figure is given on Plate 3, figure 1 of Kerr’s
Rept., N. C. Geol, Survey but unaccompanied by either name or
description.

Yorktown formation ; Yorktown (type) ; Bellefield, Va.

Spisula (Hemimactra) harrisi, nu. sp., Plate 1, Figs 5, 6

Shell large, thin, subtrigonal in shape ; beak narrow and
pointed, markedly curved anteriorly, over the impressed anterior
submargin ; anterior end slightly longer than the posterior, anter-
ior submargin dorsally impressed and flattened, becoming depress-
ed near the basal margin ; posterior dorsal margin impressed and
flattened its entire length and with a furrow extending from un-
derneath the beak, and becoming rapidly obsolete and terminating
at about one-half of the distance along the dorsal margin measured
from the beak ; surface smooth, on the center of the shell disk,
very irregular with growth lines along the basal margin ; a fine
longitudinal line along the angle bounding the impressed postero-
dorsal submargin ; on the dorsal side of this line the growth lines
are very coarse, becoming smooth again on the furrow ; hinge
agreeing with that of S. curtidens Dall, but slightly less heavy.

Fleight 105, width 122, thickness 42 mm.

This species is closely related to S. curtidens Dall. Compari-
sion with Dall’s type in the National Museum however shows
that the species is distinct. These differences may be noted. S.har-
vist is slightly less heavy, the dorsal submargins are more

53 Orsson, NEOCENE FossILs 15

impressed and flattened; beaks more inclined anteriorly and
with the furrow extending further underneath the beak on the an-
teriorand posterior submargins ; umbo narrower with more pointed
beaks. The anterior dorsal submargin of S. curtédens appears from
the fragmentary type to have been more depressed.

Dulpin formation ; Peedee river ?, S. C.

Ensis schmidti, n. sp., Plate 3, Fig’s 1-3

Shell large, thin, elongated but fairly wide, gaping at both
ends ; dorsal margin straight, but with the beaks curved upward ;
basal margin of shell evenly rounded ; posterior extremity round-
ed or truncated ; anterior extremity obliquely truncated with a
low furrow extending fromthe beak, parallel to side ; surface
smooth, polished, growth lines most strongly developed on the
posterior portion of the shell ; there is a faint indication of two
or three rays extending from the beak to the posterior portion of
the basal margin ; left valve with three teeth, right valve with
two teeth ; anterior muscle scar very elongated.

Length (type) 94, height 28, thickness 12 mm.

This species is very different from any of the other Miocene
Enses. From these it is distinguished by its relative shortness,
height, and large size. At the type locality the species occurs in
a yellow sand and is not uncommon.

Yorktown formation ; Jack's Bluff on the Nansemond river,
Va. Also at Suffolk, Va., at the Standard Oil tanks.

Semele nelliana, n. sp., , Plate 3, Fig’s 5,6

Shell large, thin, inequilateral, moderately inflated ; the an-
terior end longer than the posterior; beak small and pointed.
slightly rounded or obscurely truncated ; basal margin obliquely
rounded ; posterior dorsal slope slightly impressed ; lunule of left
valve very small ; sculpture of two kinds, a radial and a concen-
tric ; radial sculpture very distinct, of threadlets, rather low, wide
(on the maiddle of the shell disk of an average width of .75 mm),

16 BULLETIN 24 54

and these are separated from each other by impressed lines ; these
radial threadlets become much narrower on the anterior submar-
gin, obsolete on the posterior dorsal slope ; concentric sculpture
of evenly spaced, distant, high lamellz, becoming lower and more
closely spaced on the umbo; on the posterior dorsal slope the la-
mellz are more crowded, wavy and irregular in direction, but
show little or no compression; the radial threadlets are continued
on the lamellee and end just below the top; the lamellze are there

fore not crenulated.

Length 56, height 44, depth of valve 9 mm.

This fine shell belongs to the group of Semzeles represented in
the Oligocene by S. chzfolana Dall and perlamelloides Maury and
in the Pliocene by S. /eaxa Dall and S. perlamellosa Heilprin.
The only species with which comparison is necessary, is 5S.
leana, which has much the same contour. In the Miocene shell
here described, the concentric lamellz are much less numerous,
higher, and more distantly spaced, the radial threadlets coarser,
and these do not crenulate the concentric lamellze. The posterior
extremity of S. /eana is markedly truncated and with the poster-
ior dorsal slope strongly depressed; and here the concentric lamel-
lze are low, crowded and flattened. S. pevlamellosa on the other
hand, is more nearly equilateral, more elongated and with the
sculpture much like S. /eana.

Duplin formation, Peedee river? S. C.

Petricola (Claudiconcha) grinnelli, n. sp. Plate 4, Fig’s 7-10

Shell elongated, solid, often distorted ; anterior end rounded;
posterior end elongated, pointed ; right valve slightly larger and
overlapping the left, especially on the posterior, dorsal margin ;
surface sculpture of irregular, radial strize, which asa rule, are
slightly larger and separated by wider interspaces on the anterior
portion of the shell ; strize more or less granulated by concentric
lines : hinge weak, with slender teeth, those in the specimens
broken off, but, judging from the stumps remaining, consisting
of three cardinal teeth in each valve.

Type specimen: Length 22, height 13, thickness 12. mm.
A large valve: Length 25, height 16, thickness 7 mm.

The subgenus Claudiconcha Fischer as exemplified by P. mon-

55 OLSSON, NEOCENE FOssILs 17

strosa Gmelin contains shells which have the right valve slightly
larger and overlapping on the left. This species probably burrowed
in the sand. The Miocene shell compares well with the type
form of this subgenus but possesses a much more degenerate hinge.

Yorktown formation, Janes river, 5 miles north of Smtth-
eld; Bellefield.

Erycina regifica, n. sp., Plate 4, Fig’s 3-6

Shell small, thin, moderately convex, very inequilateral; an-
terior end much longer and with the beaks situated near the post-
erior end; posterior extremity well-rounded, the anterior more
pointed; surface sculptured with obsolete concentric lines, which
occasionally are wave-like on the middle of the shell surface, in add-
ition a peculiar hair-like, radial sculpture is present and quite pro-
nounced over the greater portion of the shell surface, but lacking
from the umbones ; umbones smooth and polished ; hinge strong,
with a single, small, cardinal tooth and two lateral laminz in
each valve ; interior smooth, with the muscular scar well marked
and with obscure radial rays.

Length 7.5, height 5.25, thickness 2.5 mm.
This species is readily distinguished by the peculiar, sharp,
hair-like, radial striz. In shape the species recalls Z. carolinen-
sts Dall, but is much more inequilateral. Its hinge is well devel-
oped, with the cardinal and lateral lamelle rather close together,
and in this feature suggestive of Lefton.
Duplin Miocene of South Carolina, Peedee river ?

Bornia virginiana, n. sp., Plate 2, Fig’s 4, 8

Shell oblong, thin, convex, inequilateral ; beak with the pro-
dissoconch evident, slightly recurved ; hinge normal, with the
lamellee of the right valve slightly shorter; surface polished,
with regular, impressed, concentric lines and with occasionally
more distant ones representing resting stages ; a slight, broad fur-
row extends from the beak to the basal margin; anterior and
posterior ends with 3 or 5 radial plications which crenulate the
basal margin ; basal margin with a flat broad ribbon.

fleight 5.5, width 7.5, thickness 2.75 mm.

18 BULLETIN 24 56

This species bears much resemblance to the common Miscene
B. mactroides. Its most distinguishing characteristic is the radial
plication. These plications are strong in full-grown shells but in
immature shells show only as broad crenulations of the basal mar-
gin. B. virginiana is more elongated, more convex and with
a less polished surface.

Yorktown formation ; Grove Wharf, Kingsmill, James riv-
er near Smithfield.

Rochefortia (Pythinella) filicaticola n. sp., Plate 5. Bigis) 10-12

Shell small, elongated and with the anterior end much produ-
ced and one and a half times again as long as the posterior ; an-
tero-dorsal margin straight with the extremity evenly rounded ;
postero-dorsal margin curved behind the beak, becoming straight
posteriorly aud terminating in the well-rounded posterior extre-
mity ; basal margin with a moderately deep insinuation pointing
towards the beak ; surface of shell with fine concentric growth
lines and witha few resting marks; right valve with two promi-
nent thickened teeth, separated by a deep notch ; in the left valve
the notch is wider bordered by rather thin laminze formed by a
slight thickening and beveling of the valve margin.

Length 3.00, height 7.75 mm.

The type specimen together with several specimens of the
same species were all found inside of a gasteropod shell belonging
to Latiurus filicatus Con. All the specimens had both valves in-
tact so that together with their peculiar shape, a commensal or
pirasitic habit on the above mentioned gasteropod may be taken
for granted. In its hinge structure and shape, this species agrees
well with the recent Rochefortia cuneata Verrill and Bush which
is used by Dall as typifying the subgenus Pythznella. ‘The Miocene
siclls appear to differ from its recent representative, in having its
anterior end less elongated, anterior extremity more evenly round-
ed and lastly in having the basal insinuation of its valves much
more pronounced.

Yorktown formation, James river, 5 miles north of Smith-

fie ‘d, Va.

57. OLSSON, NEOCENE FOSSILS 19

Chione dalli n.sp., Plate 3, Fig’s 7-9

Shell ovate to triangular, slightly convex, very solid ; beaks
prominent, approximate, sub-acute ; lunule lanceolate, defined by
an impressed line, smooth or with lines of growth; escutcheon
long and narrow, smooth ; surface of shell with thick, flattened,
concentric lamelle, fairly regularly arranged on the umbo, later
becoming irregular and coalescing towards the basal margin; no
radial sculpture present; hinge fairly heavy, with three cardinal
teeth in each valve ; pallial sinus merely a small notch ; margin
minutely crenulated.

Type. Length 23, height 20, thickness 6 mm.
Larger shell. Lenght 25, height 27, thickness 6 mm.

On page 1290 Dall, in his Tertiary Geology of Florida, vol. 3,
pt. 6, briefly describes without naming a Chione from Petersburg
Virginia which appears to belong to this species. This species
bears some resemblance to C. cortinavia Wagner but may be dis-
tinguished by its irregular concentric lamellee and the entire ab-
euce of the radial sculpture. At Claremont wharf the species occurs
in blue clays of the St Mary’s formation, accompanied by several
unusual species. Avca virginte Wagner is very common here, and
a small triangular Glycymeris like Pectunculus virginie Wagner
showing relationship with G. sabovata Say, of which it is probably
a mutation.

St Marys formation ; James river at Claremont wharf, Va.

Phacoides (Pseudomiltha) wongi, n.sp., Plate 1, Fig. 2

Shell orbicular, thin, inflated, inequilateral ; beaks small and
slightly prosogyrate ; lunule very deep and oval, extending un-
derneath the beak ; anterior extremity rounded, posterior extrem-
ity only slightly rounded, and in the young shell verging on
truncation ; dorsal margin straight, slightly angulated at the end;
posterior dorsal slope slightly impressed, anterior dorsal portion
somewhat wing-like and separated from the rest of the shell sur-
face by irregular marks of compression ; basal margin widely
rounded ; surface with irregular concentric wrinkles, which on
the posterior dorsal slope are more evenly spaced ; in addition,

20 BULLETIN 24 : 58

finer incremental lines occur, and fine, radial, vermicular striz
interior of shell roughened, and with a long, lucinoid anterior,
muscle scar.

Fleight 27, width 32, thickness 7 mm.

This species resembles P. foremanz Con. of the Calvert form-
ation of Maryland. ‘The shell differs in being less rotund, more
inflated, thinner and with the posterior dorsal slope much less im-
pressed. ‘The anterior extremity is likewise much more wing-
like, with the lunule deep but short, which, in P. foremanz is typ-
ically more elongated. Young shells of both P. foremanz and
P. anodonta with rather thin shells usually show a strong develop-
ment of radial lines or rays in the interior ; and the umbonal cav-
ity is generally filled with a deposit of prismatic shell substance.
The interior of the shell shows no development of these rays,

Florida ; Miocene, Upper bed at Alum bluff

Venericardia (Pleuromeris) scituloides, n. sp., Pate 1, Fig’s 1-3

Shell small, solid ; equilateral, convex triangular in shape ;
sculpture of 7-9 flat, broad ribs separated by narrow interspaces ;
umbones with the ribs coarsely or evenly granulated or sometimes
smooth ; on the basal portion, the ribs are crossed by coarse con-
centric lines ; lunule smooth, very deep, elongated and of a length
roughly one-half the height of the shell ; escutcheon smooth, lan-
ceolate ; hinge rather high and heavy ; internal margin fluted by
the exterior ribs.

Fleight 5.50, width 4.75, thickness 5.50 mm.

This species bears much resemblance to V. seztula Dall of the
Oligocene of the Oak Grove sands Florida. The most marked dif-
ferences are the fewer ribs, those of V. sctftula ranging from 12 to
14 in number and in having these ribs separated by narrower in-
spaces. From Il. ¢vzdentata Conrad, the species is distinguished
by its fewer ribs and by its shape.

florida ; Miocene of the upper bed at Alum Bluff.

59 Oxsson, NEOCENE FOSSILS 21

Glottidia inexpectans, n. sp., Plate 5, Fig’s 17-21

Shell linguloid ; elongated with the anterior extremity trun-
cated ; beaks obtuse and rounded at first, later becoming acute ;
lime depositing regularly throughout ; surface polished, with dis-
tant marks of resting stages parallel to growth lines ; other
growth lines indistinct ; sides of young shell nearly parallel or
slightly wider in the middle ; no punctate structure visible with
high power’; cardinal areain young shells distinct but small,
grooved, not seen in older shells on account of their fragmentary
nature ; ventral valve with two nearly straight laminze, which di-
verge at a small angle; dorsal valve with a straight medial sep
tum which does not quite reach to the posterior valve margin ;
no muscle scar visible in the adult shells ; valve of young shell
with the umbonal scar represented by a single, slight depression
just in front of the beak; laterals by two scars separated by a short
medial septum, and just in front of the umbonal scar; color of
shell, which appears to be original, cream-white, yellowish brown
or blackish.

Length 7.0, width 4.5 mm.(vent. valve, fragment)
Length 4.5, width 5.5 mm.(dorsal valve)
Length ro, width 5.5 mm. (large fragment)

The occurrence of this brachiopod in the Miocene is of more
than usual interest as seeming to represent the sole example of the
genus G/lottidia in a fossil state. The above description is based
on fragments of several adult individuals and upon a score or
more young shells, generally under 5 mm. in length. The young
shells were all found together in the sand contained in the closed
valves of a large specimen of Pecten Yeffersonius. They were ac-
companied by Modiolus pulchellus, Diplodonta yorkensts and <ea-
urchin spines, probably belonging to Echinocardium orthonotum.
This species is very distinct from the common Atlantic G/lottidia
audebarti Broderip (G. pyvamzdata Stm.) and shows much closer
relationship with the Pacific G. aléida Hinds. From G. audebarti
the Miocene shell differs in having the lime secreted evenly
through the shell, and in having the lamine of the ventral valve
nearly straight and diverging at but a small angle. G. a/lida of
the Pacific has more pointed beaks and a more ventricose shell,
due to the three elevated ridges which radiate from the beaks.

Yorktown formation ; Kingsmill on the James river

22 BULLETIN 24 60

CHANGE IN SPECIFIC NAMES

In the course of this work the following Miocene shells have
been found to be preoccupied and for these, new names are here
proposed.

Scala reticulata Martin, 1904, Md. Geol. Survey., p. 214, pl.
53. fig. 5, here changed to Scala martiniana new name ; preoccu-
pied by Zurbo reticulata Solander 1766, Brander’s Foss. Hant.,
p. 17, pl. 1,fig. 27 and referred by Newton 1891 (British Oligo-
cene and Eocene Mollusca, p. 213.), tothe genus Scala.

Calliostoma armillatum 'Tuomey-Holimes, 1856, Pleiocene Fos-
sils of South Carolina., p. 118, pl. 26, fig. 3 ; described as 77vochus
armillatus. Here changed to Calliostoma tuomeyi new name, pre-
occupied by Zrochus armillatus Wood, 1828, Supplement to Index
Testacologicus, Kiener figures in his Icon., vol. 10, pl. 17, fig. 2,
a Calliostoma, as Trochus armillatus Wood.

Drillia distans Conrad, 1862, Proc. Acad. Nat. Sei.) Philay;
vol. 14, p. 285., preoccupied by Dyillza ? distans Conrad, 1360,
Jour. Acad, Nat. Sci. Phila.; vol. 4, 2ud series. p: 258, pl. 46;
fig. 49, a Cretaceons fossil. I propose for the Miocene shell, Drdd-
lia conradiana, new nanie.

NOTES ON THE CORRELATION OF CERTAIN
MIOCENE BEDS EXPOSED IN THE JAMES
RIVER VALLEY

Finally, I wish to present a few notes on the correlation of
certain Miocene beds exposed inthe James river valley. The
observations upon which these conclusions are based were made
this past summer while on the Cornell Geological expedition con-
ducted by Professor G. D. Harris.

The geology of the Coastal Plain of Virginia is well treated
by Professor W. B. Clark and B. L. Miller in their report on The
Physiography and Geology of the Coastal Plain Province of Vir-
zinia, and published as Bulletin 4 of the Virginia Geological sur-
vey. In this report three formational units are recognized in
the Miocene series, namely the Calvert, St Mary’s and the York-

61 O1rsson, NEOCENE FossiLs 3

town, the Choptank being considered as absent. These for-
mations occur as broad concentric bands, the innermost naturally
the oldest. At Petersburg the Miocene rests on crystallines, and
on Eocene near City Point and elsewhere.
In the James rives valley then, commencing at the mouth,
the yellow fossiliferous sands first met with, are considered as be-
longing to the Yorktown formation. Below these yellow sands
are blue clay marls which are divided by Clark and Miller in-
to the Calvert and St Mary’s formations. It is with these blue
clay marls that I wish to deal. Hence for matter of discussion,
the Miocene in this valley may be divided into the lower blue
clays and the yellow sands of the Yorktown formation.
A fact which early impresses itself upon a worker in this val-
ley is the great paleontological similarity which the different beds
present. The fauna of the blue clays, although different in de-
tails from that of the Yorktown sands, still shows close relations.
A still greater difficulty is encountered, if a further division 1s at-
tempted. In the report above referred to, the Miocene beds at
Petersburg, on Coggin’s point and in the vicinity of City Point,
are placed in the Calvert formation, but I will attempt to show,
there is no paleontologic reason which warrants such correlation.
The fauna of the Calvert formation is rich in species which
are distinctive, such as Ostrea percrassa, Pecten humphreyst, Pli-
catula densata, Corbula elevata, Cytherea staminea, and others, to-
gether with a host of gasteropods, of which we may mention,
Turritella indenta*, Fossarus dalli and Ecphora trisulcata. In ad-
dition, we may include species which commence in the Calvert
and extend up into the Choptank, but not into the St Mary’s.
Representatives of this class are Pecten marylandicust, Panopea
whitfieldt Calliostoma aphelium. It is to be noted that none of
these shells occur in the so-called Calvert beds in this valley.
Rather complete collections were made at Petersburg, Cog-
gin’s point and at Evergreen because of the interest of their con-
*Turritella bipertita was described by Conrad from Petersburg. This
shell is often considered asa variety of 7. zzdenta. However, these
shells are not exactly conspecific and hence not available for correlation.

+Pecten tenuis H.C. lea, described from Petersburg is united by
Dall with P marylandicus. 1 have seen the type in the National Mu-
seum and consider it the left valve of P. virgimtanus Conrad. Vaughan

has recorded P. marylandicus and Calliostoma aphelium from the Mark's
Head marl, Ga., which he refers to the Calvert.

24 BULLETIN 24 62

tained faunas. These collections have not as yet been exhaus-
tively studied, but enough is known so that the following general
conclusions may be drawn. On Tinsbury creek, near Petersburg,
blue, fossiliferous marl isexposed, containing an abundant fauna
together with a large quantity of quartz pebbles, derived from the
underlying crystalline rocks. From this locality about 75 species
have been determined, of which between 13 and 14 per cent. are
represented by living forms. On Lieutenant’s run, near Peters-
burg, the same quartz bearing marls are exposed showing more or
less the same paleontological characteristics. On Coggin’s point
Miocene occurs on Ruffin’s branch, where they are seen to over-
lie Eocene beds. The fauna differs little from that of Petersburg,
but contains in addition Pecten clintonius, P. virginianus, P. de-
cemnarius and Cardium virginianum. At Evergreen, Miocene
beds are again met with of the same general type. Here Melina
(Perna) maxillata iscommon with an occasional P. virginianus or
decemnartus. ‘The beds here also overlie Eocene beds.

Not a single species characteristic of the Calvert or Chop-
tank formation has been found in the above beds. On the other
hand, the majority of the species occur also in the Yorktown or
Duplin formation. Species which illustrate this point may be
mentioned: Ostrea disparilis, O. sculpturata, Chama corticosa,
Muiinia congesta, Astarte concentrica, Arca scalaris, Pecten ebor-
eus and others,

The above points are therefore irreconcilable with the correl-
ation of these beds with the Calvert formation. |The basis of
percentage of the recent species ; the paleontologic similarity to
the overlying beds of the Yorktown formation ; and their strati-
graphic position: all point in favor of considering these beds as
belonging to the St Mary’s formation. With the St Mary’s from-
ation as exposed at its typical section, these beds agree in their
lithological and general paleontological characters. On the whole
however, they appear to me to belong to a slightly younger stage
than that at the type section. Few of the species are entirely con-
fined to this formation in this region. But we may mention here
Astarte avata, Arca virginie, and Chione dalli, Melina( Perna)
maxtilata is generally common throughout and is lacking from
the Yorktown. Pecten virginianus and decemnarius are almost ex-
clusively confined to it, but an occasional specimen is found in
the Yorktown.

AAY
ie yn oF
ant

PLATE ee (Sie ene ye
ri :

BULLETIN 24

PLATE 1 (8)

Pecten (Nodipecten) VaccaMaveNnsts, 1. SP. ...10-0.-0e20ee0eeee

Type specimen showing a portion of the right valve,
nat. size.

Phacoides ( Pseudomiltha) Wong, 1. Sp......002020eceeeeee sees
Right valve of type, about twice natural size.

Venericardia ( Pleuromeris) scituloides, n. Sp.........-------
Right valve, enlarged about twice.

Left valve of another specimen.

SPUSUUa (ELCINUMLACLT.A | HATILS05 MSP ses peer ee ee ee eee eete
Interior of right valve, 34 nat. size.

Exterior view of the same valve.

64
Page
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19 57
20 58
14 52

VOL. 5 BULL. AMER. PAL. NO. 24, PL.8

BULLETIN 24

PLATE 2 (9)

UMODLOUUS Pio CNLOLA ES ates Peete eee ee neces
View showing left valve of type specimen, nearly
nat. size.
Ventral view of same specimen.
A fragmentary specimen showing characters of the
dorsal area.
BOVRIA ULV ES TNIANG, WM.) SPaesece ue se seeaete ee eee
Exterior view of right valve, enlarged about 4
times, type.
LEHNOPRALGT VOVRCISIS. NUNS Darertee near eee see eee eee eee
Right valve of type, enlarged about twice.
Left valve of type specimen. ~
DR EST UGH A AUST VER) reece sen ec ner eosoeee co econnostoucdadcucsascbacdcor
Ventral view of type, enlarged about 1% times.
BOUMLE UV LANDON. AU SPs sedeaicaneneee eee eeoeeeee een eee
Inside view of type specimen.
LY PES RAV TISES TSP si thn tb vs Paniere te das Sacomoret senor seas eee eee
Dorsal view of type specimen.
LEHI NIUE, POALTESOS, 1 SDesoqoosscss00s0000 sco oscaccnanecosed
Co-type, showing a portion of the calcareous deposit
surrounding the shell.

17 55

13 5I

17 55

8 46

NO. 24, PL. 9

PAL.

AMER.

BULL.

VOL. 5

OLSSON, NEOCENE FOSSILS

PEATE 2. (1@)

Fig.

BULLETIN 24

PLATE 3 (10)

TENSES: SCRINTALE "WASP. soos cecuce toes setae see eee omen ese
Exterior of right valve of type, nat. size.

Exterior of left valve of type.

Inside view of right valve of a fragmentary specimen of
the above species.

Inside view of a left valve of same species.

SAHAIA WALCOTT, Nil, GD enpdonconbauooavossoasoosseesccepoosnepocoso0eN
Exterior view of left valve of type, mat. size.

Interior view of same specimen.

CHEONE AAMAS Peas ee sdeiarees sete See econ eRe ae See eels nae sae
Exterior of left valve of type, slightly enlarged.

Right valve of another specimen of same species,
exterior view.

Left valve of third specimen of the above species.

Page
15 53

19 57

NO. 24, PL. 10

PAL.

AMER.

BULL.

VOL. 5

OLSSON, NEOCENE FossIrs

BATH 4 (Gren)

NnDUWN

BULLETIN 24

PLATE 4 (I)

JERMIAD (LEAD SHDTE DI, Te SDoecccascescososseocns ase 35g90e59009e°
Left valve enlarged about twice, type.
A smaller specimen of the same.

/BEMEMIO. PELE, To E\Dscoqnocnes056a000000N00 wuibsna ste aawowacesncties
Exterior of right valveof type, enlarged about 3
times.

Exterior view of left valve of same.

Interior view of right valve of type.

Interior view of left valve of type.

Petricola (Claudiconcha) grinnellt, n. sp......- Nea stemoneeus

Exterior view of left valve of type, enlarged about
1% times.

Interior view of same specimen.

Exterior view of right valve of type.

Interior view of same specimen.

INGSSE GOTDAL MEG, 1) FVecorscnccdeesc000938000cb0a0000s0s0920C 90020

Ventral view of type, enlarged about 5 times.
WAL OUTS j AUG WALLIS 10). COs cnpasunsécostoqsonoscssaneds03906350500>

Exterior view of right valve, enlarged about 3 times.

A smaller left valve.
A right valve of another specimen.

70
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17 55
16 54
7 45
12 50

NO. 24, PL. 11

PAL.

AMER.

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VOL. 5

sanesniitie the OE

OLsson, NEOCENE FOSSILS

PVA 5) (12)

34 BULLETIN 24 72

PLATE 5 (12)

Page
Fig. 1. Yetnostoma (Solartorbis) variabilis, n. sp.............0+-- 10 48
Upper view of type specimen, enlarged about 10
times.

Profile view of a specimen of the same species.

3. Upper view of a gerontic shell showing the
smooth later whorl.

4. A smaller specimen with the ribs and striz presistant.

5. Solariella shacklefordensiS, Wh. SPoi-...cscc.42y--csseceees-cenres 9 47
Ventral view of type, enlarged about twice.

6. Under view of same specimen.

7. Solariella gemma, Tuomey and Holmes..... ............008 10 48
Ventral view of a specimen from Grove Wharf, Va.

8. Under view of same specimen.

g. Same specimen enlarged 3 times to show sculpture.

10. Rochefortia (Pythinella) filicaticola, n. sp............d..006 18 56
Interior view of left valve of type, enlarged about
8 times.

11. Interior view of left valve of type.
12. Exterior view of right valve of type.

ey | LOND TAE SLUIOS,, UUM EOSATH Ly 1D, WEI sonconncooe socoenoaosooace 7 45
Dorsal view of aspecimen, enlarged about twice.
TAK LY RULE J OMLEST: MIMS Peete eet oe ts ace ate Moan cntn tad asmustaee sees 9 47

Dorsal view of type, enlarged about 2% times.

15. Ventral view of same specimen.

16. Dorsal view of a larger specimen.

M7 G@LOULLALORINER PECLAITS My SIO eer ee ese shin tesserae eee 21 59
Interior of dorsal valve, about twice natural size.

18, Interior of ventral valve. .

19. Interior of young shell, enlarged about 4 times.

20. Exterior of a still younger shell.

21. Basal fragment ofa large specimen, twice enlarged.

VOL. 5 BULL. AMER. PAL. NO. 24, PL. 12

FF EATS

:
seal
be
Neh vs
hep
“At

Vol. 5

BULLETINS
OF
AMERICAN PALEONTOLOGY

~- 0

No. 25

On a Restoration of the Base of the Cranium of
HESPERORNIS REGALIS

Dr. R. W. SHUFELDT

December 15, 1915

Cornell Univ., Ithaca, N.Y.
WiiS.. 2A:
Harris Co.

tae

On A RESTORATION OF THE BASE OF THE CRANIUM OF
HESPERORNIS REGALTIS

3y R. W. SHUFELDT

In-so far as I am aware, there has not, up to the present time,
been published a figure giving the probable appearance, and the
various bony parts, of the cranium of that great, extinct, loon-
like diver of Cretaceous times — Marsh’s Hlesperornts regaits.
Disregarding a text-cut on page g of the ‘‘Odontornithes,’’ Marsh
gives us, on Plate I of that work, but two natural-size views of ©
the cranium of 47. 7egalis which show the lost parts restored in
outline. . These figures I have carefully studied and compared
with several skulls of the Loon ( Gavia immer), belonging to
the collection of the United States National Museum; further,
I have compared the former as well as the latter with a series of
photographs, sent me by Mr. Gerhard Heilmann, of Copenhagen,:
which photographs were made of the cranium of the type speci-
men of /7. vegalis in the Peabody Museum of Yale University,
under the direction of Professor Richard S. Lull. These are help-
ful, in the absence of the actual specimen; though not as much as
they might be had they been obtained by a photographer of ex-
perience. Unfortunately, no attention was paid to lighting, to
point of view, or to the matter of reproduction of detail, while
they show fairly well several other points. | Lastly, to aid one
in restoring the base of the cranium of Hespervornis regalis, there
are to be found still other illustrations in the ‘“‘ Odontornithes.’’
We have, on Plate II of the work, no fewer than twelve figures
devoted to the teeth and osseous structures at the daszs cranii,;
these will be duly commented upon as they are taken up in detail
and associated in the restoration here to be made.

Evidently, the first step to be undertaken is to obtain a
correct outline of the base of the cranium, as the details wzthzn

4 BULLETIN 25 76

such an outline may be filled subsequently. To obtain this, I
made a careful tracing on transfer paper of Marsh’s Fig. 5 of
Plate I of the ‘‘Odontornithes,’’ which represents, natural size, the
“skull’’ of Hesperornis regalis, seen directly from above. With the
mid-longitudinal axis of the cranium parallel to the plane upon
which the latter rests; the point of view from above being at the pro-
per distance to a\ oid the distortion caused by being too near, and
in a line perpendicular to the aforesaid plane, crossing at its
middle point the transverse diameter of the cranium situated at
an equal distance between its two extremitie-—is presumably the
view given in Fig. 5 of Plate I ; so that, if the cranium were
turned completely over and placed in the same position just des-
cribed, the outlines seen would be identical, provided we regarded
the cranium when thus placed from the same viewpoint. There-
fore, the tracing I made of the outline of the superior view shown
in Fig. 5, would be equally accurate for the corresponding inferior
or ventral view of this cranium, and likewise be of natural size.

Fig. 1 of Plate II of the ‘‘ Odontornithes ’’ presents the in-
ferior surface of the premaxillary and maxillary bones, with a
tooth (¢ ) in the groove of the latter on the left side. This draw-
ing I take to be an accurate one, for the reason that all of its out-
lines agree with those of the same parts shown in Fig. 5, Plate I
for the superior view; consequently, as faras it would carry, I used
it in my restoration, which latter illustrates the present article.

The cultrate margins of the superior osseous mandible (fmx)
were formed by the premaxillary bone, and, upon either side,
they extended backwards for a distance of 8.9 cms., terminating at
the maxillo-premaxillary suture, which is distinctly shown in the
accompanying Plate. At this point the superior osseous man-
dible has a transverse diameter of 1.75 cms.; and at a distance of
one centimeter upon either side, posterior to it, the grooves for
the teeth commenced. Each of these grooves measured antero-
posteriorly, 5.2 cms., and had implanted in them, in the manner
described by Marsh, fourteen teeth. Hither groove is nearly
straight, and lies entirely in the outer inferior part of the maxil-
lary bone on either side. The free apices of these teeth are directed |
downwards and backwards, and their description has been given

Ga HESPERORNIS, SHUFELDT

in great detail in the ‘“‘Odontornithes.”’

Between the first and the ninth tooth on either side — the
most anterior tooth being considered the first — the median por-
tion of the premaxillary has an average width or transverse dia-
meter of one centimeter; and, as the mesial margins of the pre-
palatines (fp) are somewhat further apart than this —though
they approach each other anteriorly and posteriorly — a long spin-
dle-shaped hiatus results upon either side of the premaxillary.

These hiatuses are also to be observed in Marsh’s Fig. 5 of
Plate I of the ‘‘Odontornithes,’’ where they have precisely the
same positions and apertural extent. In this figure, too, we have
the point indicated, upon either side, where the maxillary (mx)
gradually commences to broaden. This is as it isin most Colym-
bite and Gaviide, and in all probability is quite correct.

Posterior to these maxillary expansions we have the remainder
of the guadrato-jugal bar upon either side ( 7-g7); and, as we have
the posterior or guadrvo-jugal portions of these, there can beno doubt
but that the juga/ extension forward, to join the maxillary in the
case of either bar, was as we find it in Gavia immer or the Loon
of the existing avifauna, the restoration of the infraorbital bar, as
shown in my figure, from the maxillary(mx) to the quadrate(qz)
must then be entirely correct. Marsh figures the quadrato-jugal
portions in the‘*Odontornithes’’(PI.I, Fig.tand5, 97). With re-
spect to the premaxillary(dmx) hesaysthat they ‘‘areelongate, and
separate throughout their posterior two-thirds(Pl. I, Fig.5 ). Their
extremities touched the frontals. Their sides are deeply excavat-
ed for the anterior nares, and in front they are ankylosed, and
forma long pointed beak, the end of which is somewhat decurved.
This extremity, back to the nasal openings, has its surface fitted
with irregular vascular foramina, indicating, apparently, that it
was once covered with a horny bill, as in modern birds.” (P. 8.)

This part of his description is probably quite accurate; and
as far as it applies to a ventral view of the superior mandible,
I have adhered to it in my restoration, as shown on the accompa-
nying Plate. Itis all the more acceptable and likely to be correct,
in as much as he, Marsh, seems for the moment to have lost sight
of the ostrich or ratite skull he forever had in mind, while
describing the skeleton of this great, extinct, Cretaceous diver or
loon. As he makes no mention whatever of the maxzllo-palatines

6 BULLETIN 25 78

(mrp), it is fair to presume that those delicate structures were
not found to be present in the fossil remains of Hlesperornis ;
but, as there isevery reason to believe that the bird possessed
them in its skull, I have restored them according to what we
find, with respect to their morphological character, in the
skulls of the Pygopodes found in the existing avifauna of this
and other countries. They were most likely elongate, scroll-like
bones that were well separated in the median line of the cran-
ium.
Turning tothe vomerine ossification, Marsh tells us, on page
7 of the ‘“‘Odontornithes,’’ that ‘‘The vomers in Hesherornis
are separate, asin lizards and a few existing birds.’- They are
smaller than the palatines, and resemble the vome s of Rhea,
more than those of the other Ratzte. They are broadest at the base,
which is obliquely truncated, and they: taper gradually to the
pointed extremity in front (Plate II, figure 8). The thick, post-
erior end may possibly have united with the pterygoid, as well
as with the palatine. Both vomers are preserved in the skull
figured on Plate I, but are displaced.’ It is true, to be sure.
that we find double and independant vomers commonly among
lizards ; but there are no existing birds with separate, twin vo-
mers. The late Prof. William Kitchen Parker believed that
they so existed in the skulls of the woodpeckers(Piccdz) ; but
he was mistaken in regard to it, as both Garrod and I subse-
quently demonstrated. Professor Huxley entertained the same
opinion that Professor Parker did ; but, as the latter states,
he had very indifferent material to study for the determina-
tion of such a ‘point.* .

Personally I do not believe the vomers were separate in
Flesperornis, but that they were simply broken apart in the
specimens Marsh examined. As to their resembling the ‘“‘vom-
ers of Rhea,’’ I may say that this is by no means the case, :
and much less do they in any way whatever resemble the vom-

*Huxley, Thomas H.: “On the Classification of Birds ; and on the
Taxonomic Value of the Modifications of Certain of the Cranial Bones
Observable in that Class.’’ P. Z. .S., 1867, pp. 448-449, fig. 30.

Parker, Wik, Otte bicidaere. Mi7a70Sa 517075 SOGe iS gence
vol, 1, pls. 1-5 ; also article, ‘‘Birds’’, Hucycl. Brit., oth ed., vol. 111, .

p. 7106.

79 HESPERORNIS, SHUFELDT a

er of an Ostrich.* (See Plate 2.)

In Gavia immer the two halves of the single, median vomer
are easily broken apart, and each part might easily be mis-
taken for a sizgle vomer. Marsh’s figures of “‘vomers’’ of Fes-
perornis are evidently the falves of a single, median, vomerine
ossification. (“‘Odontornithes,’’ Pl. II, fig’s 8, 8a)

In restoring the /acrymals, I have followed Marsh’s fig-
ures and description ; he says : “‘The lachrymal bone is distinct,
and articulates with the frontal, nasal, and maxillary. 1 CLOR, Gib.
(D- Ga) (SES tes ie)

Vassing to the palatines(fig’s 1 and 2, Pl. II), Marsh says of
them that they ‘‘resemble those of the Ostrich. They are long,
slender bones, extending from their union with the pterygoids,
parallel with the axis of the skull, and joining the premaxillaries.
In one specimen they nearly lie in position, the left palatine be-
ing immediately beneath the left maxillary. In front of their
junction with the pterygoid, and just anterior to their widest ex-
pansion, there is a deep pocket, very similar to that in the pala-
tine of the Ostrich. The anterior half of the bone is slender and

‘tapers gradually to the extremity.’’ (Loc. cit., p. 7.)

The ‘‘pocket’’ Marsh refers to would probably not be in
view upon basal aspect of the cranium any more than it is in the
Ostrich. Such a fossa in the palatine is found in a number of the
Pygopodes, and even exists in the Grebes (Podiceps cristatus, No.
18,295, Coll. U. S. Nat. Mus.). The palatines of Hesperornis in
no way whatever resembled those bones as we find them in the
Ostriches, as any one will appreciate upon comparing nem in
Pls. 1 and 2 of the present article.

Indeed, no two birds’ skulls, either of existing or extinct spe-

Garrod, A. H. : ‘‘Notes on some of the Cranial Pecularities of the Wood-
peckers.’’ bis, Oct., 1872, pp. 367-70.

Shufeldt, R. W. : ““On the Question of Saurognathism of the Pici, and
and other Osteological Notes upon that Group.’’ P. Z. S., London, pi.
1, Feb. 3, 1891, pp. 122-129.

*Huxley, T. H. : loc. cit. ; figs. rand 2, pp. 420-427. Excellent cuts
of the basal views of the skulls of Struthio camelus and Rhea ameri-
cana are given here. While the vomers in these Ratite birds are very
different from each other, they do agree in some particulars.

8 BULLETIN 25 80

cies could be more unlike each other than are the skulls of an
Flesperornis and an Ostrich—the former being a toothed, Cretace-
ous loon, and the latter a recent, toothless, gigantic, struthian
land-bird. Their skulls are about as unlike each other as are
those of a hummingbird and a kiwi.

It will be observed that, in getting the outline and restoring
the form of the frontal region of Hesperornis ( Fig.1 pf, fv, ), I
have followed Marsh, in as much as the outline was obtained by
a tracing of Fig. 5, Plate I, as pointed out in a former paragraph
of the present article.

Marsh states, on page 6 of the ‘‘Odontornithes,”’ that ‘‘the
posterior ends of palatines,and the anterior ends of the ptervgoids
are very imperfectly, or not at all, articulaced with the basisphen-
oid rostrum;’’ and then, as I have already said, he again points
out, on page 7, that the palatines ‘‘are long, slender bones, ex-
tending from their union with the pterygeids, parallel with the
axis of the skull, and joining the premaxillaries.’’ This does not
militate against each pterygo-palatine articulation vesting upon
the base of the sphenoidal rostum, or just beyond its base, as I
have shown it in Pl. 1 of this article. In fact, if the long axes
of the palatines were parallel to the ‘‘axis of the skull,’’ as Marsh
states was the case, and, as he also states they had a “‘union with
the pterygoids,’”’ they must have been placed as I have them in
Plate 1, or quite like they are in the loons and other pygopodine
birds. From Plate 1 it will be noted, too, that I have restored
still another character given us by Marsh ; that is, there are pre-
sent ‘‘strong ‘basipterygoid’ processes, arising from the body of
the basisphenoid, and not from the rostrum, articulating with.
facets which are situated nearer the posterior than the anterior
end of the inner edges of the ptervgoid bones.”’ (P. 6.)

As to the prerygotds and guadrates themselves, I have restor-
ed them as best I could from Marsh’s figures and contour lines.
He noted that the ‘upper, or proximal, articular head of the
yudrate bone is not divided into two distinct heads,’’ (P.6.)
and this is animportant point. Thereis no question as to his view
with respect to the position of the orbital processes of the quad-
rates, for thev are given in Fig.5 of Plate I of the ‘‘Odontorni-

9) BULLETIN 25 81

thes,’ while the basal or ventral view of the left quadrate is shown
on Plate II. (6. ¢.). His representation of the ‘‘right pterygoid

bone’’ is somewhat remarkable (PI. II, figs.7,7a and 7b), and I
have restored it as best I could. From Marsh’s account, there is
no question about its meeting the proximal end of the correspond-
ing palatine, about its articulating with a stout facet found on the
basisphenoid, and about its articulation with the pterygoidal pro-
cess of the quadrate of the same side.

In restoring the hinder portion of the base of the cranium,
I was entirely guided by Figure 5 of Plate II of the ‘‘Odontorni-
thes,’’ though I must add that I am by no means convinced as to
its correctness. As Fig. 5 of Plate lin that work is given nat-
ural size as well as Fig. 5 of Plate II, both being viewed directly
from above, it is clear that the oud/zze of the posterior part of one
should be precisely the same asthe outline of the other. This,
however, isnot the case. lam therefore in doubt as to the de-
tails being correct, though at this writing it isthe best I can offer
in view of the fact that there are not at hand the actual specimens
I should have. In any event, it will form a basis for improved res-
torations in the future, the importance of which will not be ques-
tioned by the vertebrate paleontologist. There is one thing,
however, which the present article will accomplish : it will once
and for all disabuse the mind of the paleornithologist with re-
spect to there being any agreement of characters, when we come
to compare the skull of an ostrich with that part of the skeleton
of Hesperornts.

82 HESPERORNIS, SHUFELDT IO

EXPLANATION OF PLATE 1. (13)

Restoration of the daszs cranit of Hesperornis regalis. ,

pmx, premaxillary ; pp, prepalatine; map, maxillo-palatine; m7,
maxillary ; /, frontal ; v, vomer : /, lacrymal; 7, jugal ;:f/, palatine ;
Ps, postirontal Lees Jr, frontal ; g7, quadrato-jugal ; pz, pterygoid;
gu, quadrate ; sg, squamosal ; eo, ee oneeatcle ; 60, basioccipital ; oe. ¢,
occipital condyle.

(Reduced ; the amount of reduction being easily couuanteed from the
measurements given in the text. )

Pl. 13, Vol. 5

Bull. Amer. Pal.

No. 25, Pl. 1

84 HESPERORNIS, SHUFELDT 12

EXPLANATION OF PLATE 2 (14)

Basal view of the skull of the Ostrich (Struthio camelus) ; 3% nat. size. By
the author, from specimen No. 16,629, Coll. U. S. National Museum.
Bip, basipterygoid ; Qu, quadrate ; gj, quadrato-jugal ; PY, pterygoid :
7, jugal ; Pl, palatine ; A, rostrum ; v, vomer; Mx, maxillary; J/xp,
maxillo-palatine ; Pax, premaxillary.

- Pl. 14, Vol. 5 Bull. Amer. Pal. No. 25, Pl. 2

hi Leer
i

Vol. 5

BULLETINS
OF
AMERICAN PALEONTOLOGY

No. 26

THE ECHINOIDEA OF THE BUDA LIMESTONE

JEN

FB, L. WHITNEY

June 26, 1916

Cornell Univ., Ithaca, N.Y.
UE Sr ivAy
Harris Co.

THE ECHINOIDEA OF THE BUDA LIMESTONE

By FRANCIS LUTHER WHITNEY

BIBLIOGRAPHY

Agassiz, L., Description des Echinoderms fossiles de la Suisse,
1839-1840.

Bose, E., Instituto Geolégico de México Boletin Num. 25, 1910.

Clark, W. B., The Mesozoic Echinodermata of the United States:
U.S. Geol. Survey Bull. 97, 1893.

Clark, W. B. and Twitchell, M. W., The Mesozoic and Cenozoic
Echinodermata of the United States: U. S. Geol. Survey
Monograph, vol. LIV, rors.

Conrad, T. A., Rept. U. S. and Mexican Bound. Survey, Vol. I,
[Din By uesisyiy

Cotteau, G., Etudes sur les Echinides fossiles du Department de
VYonne 1857-1878.

Cotteau, Peron and Gauthier, Echinides fossiles de 1’ Algérie,
Paris, 1876-1891.

Cotteau, G., Note sur quelques Echinides du terrain crétacé du
Mexique. Bull. Soc. Geol. de France, 3 serie, t. xvii, 8¢o.

Paléontologie francaise: Description des animaux invertébrés
Vol. 7, 1862-1867.

Cragin, F. W., A Contribution to the Paleontology of the Texas
Cretaceous: Geol. Survey of Texas Fourth Ann. Rept. 1893.

Credner, G. R., Ceratites fastigatus und Salenia texana: Zeitschr.
fur gesam. Naturwiss. Vol. 46, 1875.

Desor, E., Synopsis des Echinides fossiles, Paris et Wiesbade,
1858.

Duncan, P. M., Revision of genera and great groups of the Echinoi-
dea: Linn. Soc. Journ. Zoology, Vol. 23, 1891.

Giebel, C. G. Beitrag zur Paleontology des Texanischen Kreide-
gebirges: Naturwiss. Ver. in Halle Jahresb. fir 1852, 1853.

Jackson, R. T., Phylogeny of the Echini: Mem. Bost. Soc. Nat.
History, 1912.

4 BULLETIN 26 88

Lambert, J., Bull. Geol. Soc. France, 1902-1905.

De Loriol, P., Recueil d’etude paléontologique sur la Fauna
crétacique du Portugal, 1887-1888.

Morton, 5S. G., Synopsis of the organic remains of the Cretaceous
Group of the United States, 1834.

D’Orbigny, A., Paléontologie frangaise, Description des animaux
invertebres; Terrains crétacés (Echinides), Vol. 6, 1853-1860.

Roemer, F., Die Kreidebildungen von Texas und ihre organischen
Einschlusse, 1852.

Schluter, C., Die regularen Echiniden der norddeutschen Kreide,

1883.

Shumard, B. F., Paleontonlogy of the exploration of the Red
River of Louisiana in the year 1852: Rept. of Capt. R. B.
Maneyn Wes) Atay, ys 3%

-Stoliczka, F. Mem. Geol. Survey India, Cretaceous Echinoidea,
Wolke IOV neve

Wright, T., Mon. British Fos. Echinodermata of Cretaceous
Formations: Paleontographical Society, 1864-1882.

DESCRIPTION OF SPECIES

SALENITDA£
Genus Salenza, Gray
Salenia volana, n. sp.
Plate I, figures 1-9

Dimensions.—Diameter at ambitus, 14 mm.; height, 8 mm.;
apical disk, 9 mm.; peristome, 7 mm.

Description.—The test is subcircular in outline at the ambitus;
abactinal surface gently convex, the sides inflated; actinal surface
flat or moderately concave.

The ambulacral areas are narrow, slightly undulating at
the abactinal ends, widening gradually from 1.5 mm. at the apical
disk to 2 mm. at the peristome. Surface ornamented with 15 to
17 alternating, imperforate, mammiullated, non-crenulate, longi-
tudinally oval, primary tubercles. Situated between these on
either side of the median line, especially in the region of the

89 Buna LIMESTONE, WHITNEY i

peristome, are small granules. Smaller granules also encircle
the plates. The pores are round, uniserial, and a little irregular
in the region of the peristome.

The interambulacral areas are broader than the ambulacral
being 4 mm. wide in the placogenous zone, 7 mm. in the median
zone, and 3.75 mm. at the edge of the peristome. They consist
of two rows of large, alternating plates, five in each row. The
primary tubercles decrease gradually in size from the abactinal-
surface to the peristome where they are about as large as the
tubercles of the ambulacra area. On each plate there is a promi-
nent, crenulated boss bearing an imperforate mamelon sur-
rounded by a large areola. Mammillated granules are so arranged
around the margins of the plates that there are two on the upper
adradial corners, while on the median margins of the plates there
are from three to five. This is not an invariable distribution, for
in the specimens studied, there is some change from area to area.
There are miliaries between the tubercles of the adjoining plates
along the median line. These are also found between the granules
bordering the plates.

The peristome is large and circular. The basicoronal plates
bear ten moderately deep branchial incisions. The interambul-
acral areas are straight between the incisions, and slightly broader
than the ambulacral lips which are bilobate.

The periproct is elevated, subeliptical, the posterior side being
nearly straight; the anterior, subangular.

The apical apparatus is large, circular, and slightly concave
near the outer margins. It is composed of five ocular and five
genital plates and one supernumerary plate, the suranal, which
is at the center of the system. The right anterior genital plate
has an incision of irregular form.

This species differs from S. texana Roemer inthat it is not
so elevated and has fewer ambulacral and interambulacral plates.
The character of the interambulacral lips is also different, those
of S. texana having two lobes whereas those in S. volana are
straight. The periproct is also different in form. This species
resembles S. mexicana Schliter, but it is more depressed and has

6 BULLETIN 26 90

only sixteen ambulacral tubercles whereas S. mexicana has twenty.
The apical system is similar to that of S. mexicana, and has the
right anterior genital plate incised in about the same manner.
{In the specimens studied, there are no ridges on the plates of the
apical apparatus, but they were possibly eroded away although
the specimen appears well preserved.

Salenia volana resembles S. prestensts Desor, but it has only
five interambulacral plates whereas the European species has
seven. The distribution of the granules is also different. Its
general outline resembles that of S. prestensts more than that of
S. mexicana. Considering the few important differences already
mentioned, and the fact that S. volana occurs in the upper Ceno-
manian, whereas S. prestensis is from the Aptian and S. mexicana
is from the Vraconian, it seems safe to regard it as a distinct
species.

Since the above description was written, Dr. Bose has examin-
ed the type, and he believes that it is not the same as S. mexicana
Schltter.

Number of specimens: 6.

Occurrence: Lower division* of the Buda Limestone Shoal
Creek, Austin; and Manchaca, Texas.

HEMICIDARIDA
Genus Goniopygus, Agassiz
Gontopygus budaensts, n. sp.

Plate II, figures 1-8

Dimensions.—Diameter at ambitus, 4.5 mm.; height, 2.25
mm.;: apical disk, 3 mm.; peristome. 2.75 mm.

Description—Test of small size, subconoidal; -abactinal
surface elevated; actinal surface flattened or concave.

The ambulacral areas gradually widen from the apical disk
to the ambitus whence they decrease in width to the peristome.
They are composed of 6-7 plates surmounted by mammillated,
noncrenulated, imperforate tubercles which increase in size
from the apical system to the ambitus, decreasing again toward
the peristome. The pores are round, uniserial, and oblique.

*In the vicinity of Austin the Buda Limestone displays two distinct phases:

a lower, chalky or marly, soft, white rock, and an upper, hard, yellowish to
reddish rock.

gI BupA LIMESTONE, WHITNEY 7

The interambulacral areas are widest at the apical disk,
and gradually decrease in size to the peristome. They are com-
posed of 6-7 plates ornamented with mammillated, noncrenulated,
imperforate tubercles which increase in size to the ambitus,
decreasing again toward the peristome. Besides these primary
tubercles, there are granules distributed about their bases and
over the surface of the plates, but the specimens studied are
not well enough preserved to make out their distribution.

The peristome is large, about .61 of the diameter of the test,
decagonal and notched. The ambulacral and interambulacral
lips are nearly equal and bilobate.

The apical system is prominent and elevated above the general
surface of the test. It consists of five genital and five ocular
plates. The genital plates are variable in form, the anterior
plates being larger than the posterior plates. They are polygonal
in outline and bounded by six or seven sides. The oculars are
likewise somewhat variable in form and size. They are bounded
by three long and two short sides. The surface of each genital
plate is ornamented with a central depression containing a mame-
lon from which ridges radiate outward to the edges of the plate.
The genital openings are at the edges of the plates where they join
the corona. The periproct is subquadrangular and bordered by
a raised collarette.

The specimens collected range in size from 4.5 mm. to about
9 mm. in diameier. They are not well preserved except in the
smaller sizes. They occur most frequently at the base of the upper
division of the Buda Limestone, but they range to the top and
occur at the contact with the Eagle Ford. None has appeared
yet in the lower division of the Buda, nor in the other divisions
of the Washita series. ;

This species does not closely resemble any other described
form of Goniopygus.

Number of specimens: 16.

Occurrence: Upper division of Buda Limestone, Austin,
Texas.

CENTRECHINIDA
Genus Codiopsis, Agassiz
Codiopsis texana, n. sp.
Plate III, figures 1-4; Plate VI, figure 2

8 BULLETIN 26 — | 92

Dimenstons.—-Wiameter, 27.75 mm.; height, 21.5 mum:
apical disk, about 11 mm.; peristome, 12 mm,

Description.—Test of medium size, elevated, subpentagonal
in outline, the ambulacral areas being at the angles, while the
interambulacral areas form the sides. The superior surface is
inflated or domed, whereas the inferior surface is abruptly rounded
from the ambitus to the peristome. Oe

The ambulacral areas are prominent, nearly straight, in-
flated, and gradually tapering from a point at their junction
with the oculars to the peristome where they are 5.5 mm. wide.
Above the ambitus, there are only scattered tubercles or granules,
but the surface is impressed by fine, longitudinal, undulating
ridges giving it a shagreen appearance. Extending over about
two-thirds of the distance from the peristome to the ambitus,
there are two rows, of about seven each, of round, noncrenulate,
imperforate, mammillated, alternating tubercles which decrease
in size toward the peristome. Adradially of these, are two rows
of small granules in each pore area. The row near the outer edge
of the area has from three to eight granules, and is shorter than
the more median row which extends nearly as far toward the
ambitus as do the mammillated tubercles. Small granules en-
circle the areolas, and, associated with these are almost micro-
scopic crenulations or warts which form a delicate wreath about
the base of each scrobicule. Above the ambitus, the pores are
both round and oval. Each pair of pores is located in a depres-
sion, surrounded by a peripodium, and arranged in arcs of three
pairs to each ambulacral plate. Below the ambitus, the pore
pairs increase in number till there are four rows at the peristome.
In this region, the pores are more oblique than those above the
ambitus, and emerge from the sides of a granule which separates
the pores of each pair. Encircling each pore pair is a well de-
veloped rim which is interrupted opposite the pore nearest the
peristome.

The interambulacral areas are large, depressed at the middle,
and about three times as wide as the ambulacral areas. The
surface above the ambitus is ornamented like that of the am-
bulacral areas. Below the ambitus, there are four rows of round,

93 BupA LIMESTONE, WHITNEY 9

noncrenulate, mammillated, imperforate tubercles diverging
from the peristome in two rows on either half of the areas. In
the adradial rows there are from 7 to 8 tubercles, while in the medi-
an rows there are from 4 to 5 tubercles. Each areola is bounded
by a wreath of fine crenulations outside of which there is a circle
of granules and warts.

The peristome is small, roughly pentagonal, and without
notches. The ambulacral lips are twice the width of the inter-
ambulacral lips.

The apical system is flush with the surface of the test, and
is composed of five genital and five ocular plates so intercalated
with the coronal plates that it is difficult to distinguish them.
The right anterior genital plate is larger than the others and is
spongy, containing the madreporite. The genital pores are
large and toward the outer ends of the plates. The surfaces of
the other plates appear to have been marked with longitudinal
ridges like those of the corona, but weathering has almost oblit-
erated them. The ocular plates are irregular in form. Some
appear pentagonal in outline while others do not, possibly owing
to their state of preservation. The oculars are perforated to-
ward their outer ends. The periproct is roughly pentagonal.

This species closely resembles Codiopsis doma Agassiz,
but is not so elevated as that species and the sides are not so
straight and the proportions are not the same. Comparison
with a specimen from France indicates that the two are separate
species, although very closely related.

Number of specimens: 1.

Occurrence: Top of lower division of Buda Limestone,
Austin, Texas.

Cottaldia rotula Clark
Plate IV, figures 1-10; Plate V, figures 1-2
Dimensions.—Diameter, 24 mm.; height, 17.50 mm.; peris-
tome, 3.5 mm.
Description.—Test of small or medium size, depressed,
circular in outline, melon shaped, the narrow ambulacral areas
standing slightly above the interambulacral areas.

10 BULLETIN 26 04

_ The ambulacral areas are broadest at the ambitus, and their
surfaces are ornamented with mammillated, crenulate, perforate
tubercles arranged in transverse rows of two to three tubercles
on each half of the ambulacrum, alternating with similar rows
on the opposite half. This number may be reduced to one
on each half ambulacrum in very small specimens. Around each
couplet or triplet of tubercles there is a ring of granules. This
ring does not seem entirely to close each areola, but shows only
a tendency to do so between the tubercles.

The pores are round and uniserial or moderately arched
and separated by granules. Below the ambitus, they become
crowded and irregular.

The interambulacral areas are broad, being four or five
times as wide as the ambulacral areas. The median portion
is somewhat depressed, leaving the area in rounded, inflated
halves. The surfaces of these areas are ornamented with alter-
nating arched rows of mammillated, crenulate, perforated tuber-
cles numbering from 3 to 11 on each half area. This number
varies according to the age of the individual. In the small speci-
mens, there appear to be only three tubercles, in each row, but
in the larger ones the number increases to 10 or 11. This variabil-
ity extends to the ambulacral areas as well, although the specimen
figured in Plate IV, figure 7 shows a persistence in two tubercles
to the row. This is a small individual considerably magnified
in the figure. Encircling each areola is aring of granules. These,
and the granules on the ambulacral area, are so arranged that
they appear at first sight as a double row of granules between
the rows of tubercles. Toward the apical system and the peris-
tome, the number of tubercles is reduced, and in the revion of the
peristome some crowding occurs.

The peristome is relatively small, decagonal, and notched.
The ambulacral and interambulacral lips are straight, but the
latter are about one-half of the width of the former, measured
from notch to notch.

The apical system consists of five subtriangular genital plates
and five V-shaped ocular plates so arranged that they form a

95 Bupa LIMESTONE, WHITNEY 11

wreath like system. The genital plates are pierced centrally
by large genital pores. The periproct is large and subpentagonal.

During its development this species undergoes considerable
change in form and proportions as well as in ornamentation, as
shown in the following table:

Diam. Height Tubercies in Tubercles in
No. of specimen mm. mm. each half Amb. each half lamb.
I 4.62 2.50 i Bad
2 6.00 3.62 DAD a=3
3 8.00 4-75 2-2 4-5
4 10.00 6.50 22 6-6
5 12.00 2D) 6-7
6 15.00 10.25 O) XOG) 2) Ole 83 7-8
a 17.00 13.00 AOI BA (Ore 83 7-8
8 18.00 12.50 DUO a2) Oi. 8-9
9 24.00 17.50 aa OIE T

(Measurements, across the area at the ambtitus )

Number of specimens: 11.

Occurrence: Both divisions of the Buda Limestone, Austin
and Manchaca, Texas.

PHYMOSOMATIDA
Genus Cyphosoma, Agassiz
Cyphosoma volanum? Cragin
Plate VI, figure 1
Cyphosome volanum Cragin, 1893, Geol. Survey Texas Fourth Annual
Report, p. 147.
Cyphosoma volanum Cragin, 1894, Colorado Coll. Studies, Vol. 4, pp. 45,

47-
Cyphosoma volanum Hill, 1901, U. S. Geol. Survey Twenty-first Annual

Report, pt. 7, p. 283.
Cyphosoma volanum Clark, 1915, U. S. Geol. Survey Monograph, Vol.
LIV, p. 61, Pl. X XI, figs. 2a-b, 3.
Dimenstons.—Diameter, 15 mm.; height, 6 mm.
Description—Test circular, depressed, slightly elevated

above the ambitus, concave below it.
- Ambulacral areas narrow, broadest at the ambitus, pointed

at the poles; ornamented with two rows of alternating, mammil-
ated, crenluate, imperforate tubercles which are largest in the
ambital region. Areolas bordered by granules so arranged that
they form polygons with the largest granules at their angles;

12 BULLETIN 26 96

number of plates, about 12.

Pores variable and in undulating rows which double above
the ambitus near the apical system.

Interambulacral areas, double the width of the ambulacral
at the ambitus; tubercles mammillated, crenulate, imperforate,
and arranged in two rows on each half of the area. The areolas
are bordered by granules forming polygons with extra large
granules at the corners of the plates along the median and adra-
dial lines.

Peristome and apical system unknown.

This is possibly the same as the species described by Cragin,
but the specimen from the Buda Limestone is fragmentary and

therefore unsatisfactory as a basis for determination and descrip-
tion. :
Number of specimens: 1.

Occurrence: Upper division of the Buda Limestone, Austin,
Texas.

PYGASTERIADA

Genus Holectypus, Desor

Holectypus planatus? Roemer
Plate VII, figures 1-5
Holectypus planatus Roemer, 1849, Texas, p. 393.-
Holectypus planatus Roemer, 1852, Die Kreidebildungen von Texas,
fo, GL | IgE. OS, ine, @,
Holeciypus planatus Shumard, 1852, Exploration Red River of Louisiana
Rept. p. 211.
Holectypus planatus, Giebel, 1853, Naturwiss. Ver.in Halle Jahresb.,
P- 373-
Holectypus planatus Conrad, 1857, U. S. and Mex. Boundary Surv.
Report, Volk pt: 2, p. 145.) Ply i, dige 14.
Holectypus planatus Desor, 1858, Synopsis des échinides fossiles, p. 174.
: Holectypus planatus Gabb, 1859, Cat. Invert. Fossils Cretaceous, p. 18.
Holectypus planaius Meek, 1864, Smithsonian Misc. Coll., Vol. 7 (177).

pee

Holectypus planatus Clark, 1891, Johns Hopkins Univ. Circ., Vol. 10,
No. 87, p. 76.

Holectypus planatus Clark, 1893, Johns Hopkins Univ. Circ., Vol. 12,
No. 103, p. 51.

Holectypus planatus Clark, 1893, U. S. Geol. Survey Bull. 97, pp. 51, 59.
Pl. XXII, figs. 2a-1.

07 Bupa LIMESTONE, WHITNEY pane ge’

Holectypus planatus Cragin, 1893, Geol. Survey Texas Fourth Ann. Report
Pp. 159, 160.

Holectypus planatus Hill, 1901, U. S. Geol. Survey Twenty-first Ann.
Report, pt. 7, p. 226.

Holectypus planatus Clark, 1915, U. S. Geol. Survey, Monograph, Vol.
LIV, pp. 65, 66, Pl. XXV, figs. 2a-f, 3a-c, 4, Pl. X XVI, figs. Ia-e.

Dimensions.—Diameter, 14 mm.; height, 7.25 mm.; peris-
tome, 4.5 mm.; apical system, 1.5 mm.

Description. —Test small, subcircular; upper surface ele-
vated, inflated; lower surface flattened or concave toward the
peristome.

The ambulacral areas are narrow, straight, widest at the ambi-
tus, and somewhat lanceolate in form. There appear to be six
rows of tubercles at the ambitus, but they decrease in number to-
ward the peristome and apical disk.

The pores are uniserial, small, and round.

The interambulacral areas are a little more than twice as
wide as the ambulacral areas. There are six rows of tubercles
at the ambitus, but this number rapidly decreases toward the
peristome and apical system.

The apical disk is small and regular in outline. It consists
of five genital plates perforated by large genital pores, and five
ocular plates. The madreporite is large and occupies the central
portion of the system.

The peristome is a little less than one-third of the diameter
of the test. It is slightly notched and decagonal in outline.

The periproct is oval and extends from the peristome to the
outer margin of the test.

There are only two specimens athand and they are so poorly
preserved that it is very difficult to make a satisfactory determina-
tion or description of them. They probably belong to the species
H. planatus, but there is some possibility that well preserved
specimens would show that they do not.

Number of specimens: 4.
Occurrence: Buda Limestone, Austin, Texas.

4 BULLETIN 26 98

NUCLEOLITIDA
Genus Echinobrissus, Breynius
Echinobrissus angustatus Clark
Plate VII, figures 6-9; Plate IX, figure 4
Echinobrissus angustatus Clark, 1915, U. S. Geol. Survey Monograph,
Vol. LIV, p. 69, Plate XX VII, figs. 2a-c.

Dimenstons.—Length, 15.5 mm.; width, 14 mm.; height,
$8.5 mm.

Description —Test small, subovate, rounded anteriorly,
subquadrate and broadest posteriorly; upper surface elevated;
apex anterior of the centre; lower surface concave.

The ambulacral areas are subpetaloid on the upper surface,
simple toward the ambitus, and form a rudimentary floscelle
near the peristome. The posterior ambulacra are the longest.
Between the pore zones the areas are ornamented with two
alternating rows of mammillated, perforate tubercles whose
areolas are deeply sunken and surrounded by closely set granules.

The pores within the subpetaloid parts are arranged in pairs,
the outer pores of which are oval whereas the inner ones are round.
Here the pore pairs are separated by rows of fine granules, four
to the row, within the pore zone itself. From the open ends of
the subpetaloid parts the pores are fine and continue in diverging
single rows to the ambitus. On the lower surface the pores again
become paired and obliquely set in the floscelle.

The interambulacral areas are broad and ornamented with
numerous tubercles surrounded by deeply sunken areolas. The
spaces between these areolas are covered with fine granules.

The apical system is small. Four of the genital plates are
pierced by large genital openings. The madreporite is large and
centrally located.

The peristome is subpentagonal, sunken and ornamented
with several rows of fine, closely set granules.

The periproct is oval, and situated at the anterior end of a
deep groove.

Although the material described by Clark was too poor to
serve as a basis of a satisfactory description, it appears to be the

99 BupA LIMESTONE, WHITNEY 15

same as that described above. In fact, the measurements agree
with the material here selected, but the species attains a much
larger size, e.g., length, 21 mm.; width, 19 mm.; height, 9.5 mm.
Number of specimens: 27.
Occurrence: Upper division of the Buda Limestone, Austin,
Texas.

SPATANGIDA
Genus Enallaster, d’Orbigny
Enallaster traskt, n. sp.
Plate VIII, figures 1-3

Dimensions.—Length, 40 mm.; width, 38 mm.; height, 20
mm. or more.

Description —Test of medium size, suboval, widest part
about midway of the length of the test; upper surface elevated,
rising abruptly from the anterior margin, possibly highest in
anterior, and gently sloping toward the posterior; anterior groove
broad and forming a deep, wide notch in the anterior margin;
posterior somewhat truncated; lower surface elevated in the
region of the plastron, depressed about the peristome, giving rise
to a keel-like form in the plastron.

The unpaired ambulacrum is in the anterior groove The
pores consist of alternating elongate and rounded pore pairs.
In the specimens studied, this alternation is not regular, for
there are two pairs of elongate pores followed by a pair of round
pores; then five pairs of elongate pores followed by a pair of round
ones, which are, in turn, followed by three elongate pore pairs
before another pair of round pores occurs. The area is not well
enough preserved to follow out the complete series. The anter-
ior paired ambulacral areas are flexuous. The pore zones are
composed of an anterior zone of rounded pores and a posterior
zone of round pores in the internal row and elongate pores in the
external row. Five pairs of the posterior zone correspond to
about seven pairs of the anterior zone.

The posterior ambulacral areas are much shorter than the
others. Their pore zones consist of an anterior row of round
pores separated from a posterior row of elongate pairs.

The surface of the test is covered with tubercles having broad
areolas bordered by fine granules.

16 BULLETIN 26 roo

The peristome is small, transversely oval, and situated at
the end of the first quarter of the length of the test.

The periproct is not preserved in the specimens studied.

The apical system is composed of four genital plates with
large perforations, and five oculars. The right and left anterior
genital plates are the largest, and approximate each other in size.
The left anterior plate, however, unlike those of other species,
narrows at its posterior end and extends backward throughout
the entire apical system.

This species resembles E. oblquatus Clark, but it is more
rounded in ambital outline and not so high. The anterior slope
is also much steeper than in that species. It is more rounded than
E. mexicanus Cotteau, and not so broad posteriorly.

I take pleasure in naming this species in honor of Mr. P. D.
Trask, a student in Geology, whose interest and enthusiasm have
led to several important discoveries concerning the fauna of the
Buda Limestone. |

Number of specimens: 2.

Occurrence: Buda Limestone, at base of upper division, Shoal
Creek, Austin, Texas.

Enallaster bravoensis Bose
Plate VI, figures 3-5
Enallaster bravoensis Bése, 1910, Instituto Geol. de Mexico, Boletin 25,
. 168.

ee Figs. 5-10; Lam. 42, figs. 2-12; Lam. 43, figs. 1-2, 6-7.

Dimensions.—Length, 38 mm.; width, 34 mm.; height,
21 mm.

Description.—Test of medium size, cordate, broadest anteri-
orly, truncated posteriorly; upper surface arched, the greatest
elevation being between the apical system and the posterior
border; unpaired interambulacrum with a slight crest. Forward
from the apical system the test slopes rapidly; posteriorly, it
remains high and is truncated; lower surface flattened, depressed
about the peristome, and somewhat elevated posteriorly. The
anterior groove is broad and deep, commencing in the apical
system and extending forward around the ambitus, which it

IOI BupA LIMESTONE, WHITNEY 17

notches, to the peristome.

The unpaired ambulacrum is situated in the anterior groove,
and is wider than the other areas. Each pore zone is composed
of eleven or more pairs of equal, rounded pores followed by a
series of elongated, oblique pore pairs alternating with oval,
oblique pores. This sequence continues for about two-thirds
of the distance from the apical system to the ambitus. From this
point the pores are in simple, oblique pairs to the peristome.
The anterior paired ambulacra are not so long as the unpaired
one, but they are nearly as wide. They are slightly flexuous,
with the greatest curve at their posterior ends. The pores of
their anterior zones are small, round, grouped in pairs, and vari-
able in size. The posterior zone is much broader, and the pores
of each pair are unequal, the internal ones being oval whereas
the external pores are elongate. Seven pairs of the posterior
zone correspond to about five pairs of the anterior zone. At the
ends of the posterior zone, the pores become oval.

The posterior ambulacral areas are short and relatively
broad. The pore zones are unequal, the anterior being narrower
than the posterior, and composed of pairs of rounded pores.
The pores of the posterior zone are elongate, the inner pores
being a little shorter than the outer ones.

The tubercles are small, perforate, crenulate, and surrounded
_ by broad areolas bordered by fine granules. The tubercles are
largest in the interambulacral areas where they are associated
with several fasciole-like bands of very fine granules. On the
lower surface the tubercles are numerous, especially on the plastron.

The peristome is small, oval, and situated very near the an-
terior.

The periproct is rounded and situated in the upper part of
the posterior truncation.

The apical system has four perforated genital plates, of which
the two posterior are more separated than the anterior ones.
Other details of the system are lacking-in the specimen studied.

This species differs from FE. texanus Roemer, in its form and
dimensions, the position of its highest point, and the ratio of

18 BULLETIN 26 102

the elongate pores to the rounded pores of the paired ambulacral
areas. In FE. texanus this ratio is four rounded pores to six elongate
ones, whereas in E. bravoensts it is five to seven.

Number of specimens: 5.

Occurrence: Buda Limestone, Austin, Round Rock, and
Manchaca, Texas.

Genus Hemuiaster, Desor
Hemuzaster calvint Clark
Plate VIII, figures 4-7; Plate IX, figures 1-3
Hemuaster calvini Clark, 1893, Johns Hopkins Univ. Cir., Vol. 12, No. 103,
o 5s
Hone calvinit Clark, 1893, U. S. Geol. Survey Bull. 97, pp. 90, 91,
Pl. XLIX, figs. 2a-1.
Hemuaster calvinit Bése, 1910, Instituto Geol. de Mexico Boletin 25,
p. 175, Lam. 43, figs. 3-5, 8; Lam. 44, figs. 1-8, Lam. 45, figs. 1-3, 5.
Hemiaster calvini Clark, 1915, U. S. Geol. Survey Monograph, Vol. LIV,
p- 91, Pl. XLVII, figs. 2a-i.

Dimensions.—Length, 31 mm.; width, 27.5 mm.; height,
22.00 mm.

Description —Test of medium size, slightly polygonal in
outline; upper surface elevated; lower surface flattened or slightly
swollen in the region of the plastron; posterior truncated; am-
bulacra moderately and about equally depressed on the upper
surface.

The unpaired ambulacrum is situated in a relatively broad
and moderately deep groove beginning at the apex and extending
forward to the ambitus which it notches slightly in passing around |
to the peristome. The pore zones are composed of pairs of small,
oval, or nearly rounded, obliquely set pores. The pores of each
pair are separated by a granule. This arrangement prevails
half the distance from the beginning of the ambulacrum to the
ambitus. Beyond this the pores are not so conspicuous, and con-
tinue to the peristome in widely separated pairs which are decidedly
oblique.

The paired anterior ambulacral areas are broad, lanceolate,
and situated in deep grooves. The pore zones are broad at
their centres, but constricted at their ends. The pores of the

103 BuDA LIMESTONE, WHITNEY 19

anterior and posterior zones are alike, and consist of pairs of
small pores joined by line-like grooves. The space between the
two zones is equal to the width of the zones. Beyond the peta-
loid parts the pores are continued as distant pairs of small, rounded,
obliquely set pores which diverge rapidly toward the ambitus,
but converge below it toward the peristome.

The posterior ambulacral areas are shorter than the others,
and are situated in deep grooves. The pore zones are composed
of pore pairs like those of the anterior areas. Beyond the peta-
loid parts, the pores are distant and minute on the upper surface,
but closer together and larger on the lower surface.

The interambulacral areas are large and form crests about
the apical system. Of these, the most prominent is the posterior
crest. The lateral areas are divided into three distinct areas
formed by two more or less prominent crests which extend from
the apex to the ambitus. The surface of the test, with the excep-
tion of the petaloid parts, is covered with irregularly scattered
tubercles.

The peristome is small, subpentagonal, and situated con-
siderably anterior of the center.

The periproct is oval, and located in the upper part of the
posterior truncation. |

The fasciole is broad and prominent about the ends of the
petaloid parts.

The apical system is of moderate size and located very slightly
in advance of the center of the test. The genital pores are large,
and so placed that the posterior ones are more separated than the
anterior.

The madreporite is large and in the center of the system.
The oculars are pentagonal.

Number of specimens: 6.

Occurrence: Buda Limestone, lower division, Austin and
Manchaca, Texas.

20 BULLETIN 26 IO4

EXPMANATION OF
PLATE 1 (5)

SS IEI TEU OLAIL ARVIN, ISPIe hau on deckuicoatc Ses eRe Lea e eee EE eae Page 4 (88)
Fig’s 1, 5, 9.. Lateral surface of the test, enlarged.
6, 7. Lateral surface of the test.
2, 3. Upper surface of the test, enlarged.
8. Lower surface of the test, enlarged.
4. Ambulacral area, enlarged.

No. 26, Pl. 1

Bull. Amer. Pal.

id A oP A!) Ba)

ik
Vga
a WY Bit ae

BULLETIN 24 106

EXPLANATION OF
PLATE 2 (16)

GORTOPV TUS OIA CEMSTS Te 1S, eae eoe vs cose sees mae menccee nent scene Page 6 (90)
Fig. 1. Upper surface of the test, X 8.

2. Lower surface of the test, X 8.

3. lateral surfrce of the test.

4. Lower surface of the test.

5, 6. lateral surface of the test, enlarged.

7. Ambulacral area, enlarged.

8. Interambulacral area, enlarged.

PI. 16, Vol. 5

Bull. Amer.

Pal.

No. 26. Pl. 2

"
5

cm siay
ves phan

: (ett Rats ‘
Se?

Peart

Ne
Mrs
per rte

24 BULLETIN 26 108

EXPLANATION OF

PVA ae 63 (72)

COdIOPSISUTE RANG, Ai. SP ieee ROn tae eat eee eenenn eta Page 7 (91)
Fig. 1. Upper surface of test.

2. Tateral surface of test.

3. Lateral surface of the test, <2.

4. Lower surface of the test, <2.

No. 26, Pl. 3

Bull. Amer. Pal.

Pl. 17, Vol. 5

aly Bai
ma

'
on

26 BULLETIN 26 IIo
EXPLANATION OF
PLATE 4 (18)
Cottaldia\rotulas Clare ae ins eee esas sane ane n aes Pageg (93)
Fig. Upper surface of the test, X3.

Te
2
3
4
5.
6.
i
8
g)
Oo

Upper surface of the test of adult.
Lower surface of the test, <4.
Lateral surface of the test, 2.
Apical system, X9.

Lateral surface of the test.

Lateral surface of the test, X3.75.
Interambulacral area, enlarged.
Ambulacral area, enlarged.
Laterel surface of the test, <7.

. 26. PI.

. Amer. Pal.

Bull

PI. 18. Vol

EN ctes
ia

aby Rone

me
vin
Cr

ean

eae

BULLETIN 26

EXPMANATION OF

PLATE 5 (IQ)
GCOttQlata VOlula (Clarke ace e eee ee ee
Fig. 1, (Above). Apical system, 18.
2, (Below). Lateral surface of the test, x 32.

IIZ

Pi. 19, Vol. 5 Bull. Amer. Pal. No. 26, Pl. 5

ri
s

See

39°

BULLETIN 26

EXPLANATION OF

PLATE 6 (20)

Gy phosoma, volanuin 2, Cragin iiscssewenscoeccesanceerecaneaaaess
Fig. 1. Lateral surface of the test.
COATOPSIS LC LANAMAN (SP a ha-kstis secsebene senator enceeoenn sesetnens
Fig. 2. Apical system, enlarged.
SEGA IIA QEORIUA OSES VETS, | Sonne JosanoaddboonecoosHenocacossosceD
Fig. 3. Lateral surface of the test.

4. Upper surface of the test.

5. Lower surface of the test.

II4

Page 11 (95)
7 (91)

16 (100)

PI.20 , Vol. 5 Bull. Amer. Pal. No. 26, PI. 6

Bit

1
ee

jettles

32 BULLETIN 26 116

EXPLANATION OF
PAVACE 7 (ay)

LLOLECIYPUS PIAIOTUS) 2 ROCIICT AN Sen eee ene eee eee Page 12 (96)
Fig. 1. Upper surface of the test, 3.
2. Lower surface of the test, <3.
3. Lateral surface of the test, <4.
. 4. Lateral surface of the test.
5. Lower surface of the test of another specimen.
LL CHAMOOTASSUS (CLO USLATIS) | Lats ete ee ne iene ee a 14 (98)
Fig. 6. Lateral surface of the test, 2.75.
7. Upper surface of the test, 2.
8. Upper surface of the test, <3.
g. Lower surface of the test, X3

Pl. 21, Vol. 5

Bull. Amer. Pal.

No. 26,

Ab 7

i
Ae

Ta
oe,

II BupA LIMESTONE, WHITNEY

Plate 8

34 BULLETIN 26 118

EXPLANATION OF

PLATE 8 (242)

EMSA ALES ep Bale, Do, | Besceooonoaseur casco ow enc pce peouacaEcaecese: Page 15 (99)
Fig. 1. Upper surface of the test.

2. Lower surface of the test.

3. Lateral surface of the test.
VTCTNUOSLCH COLOLILIN Clan een na Nave anon ae eae eRe aera las
Fig. 4. Lateral surface of the test, <3.

5. Lower surface of the test, <3.
Upper surface of the test, <3.

6.
7. Lateral surface of the test, X1.3.

Pl. 22. Vol. 5 Bull. Amer. Pal. No. 26, Pl. 8

frie
enn

BULLETIN 26 120

EXPLANATION OF

PLATE 9 (23)

TCIM TASLOTNEOLULIIE: NOL T cate Moet eee nian Ui snela tame en une Ba Page 18 (102)
Fig. 1. Upper surface of the test, X1.3.
2. Lower surface of the test, X1.3.
3. Posterior surface of the test, X1.3.
Echtinobrissus angustatus Clark.
Fig. 4. Lower surface of the test, 7.

Pl. 23, Vol. 5 Bull. Amer. Pal. No. 26, Pl. 9

Fes

Vol. 5

BULLETINS
OF
AMERICAN PALEONTOLOGY

No. 27
NEW MIOCENE FOSSILS

AXEL OLSSON

July 24, 1916

Connell Oniva\itinacawNe Me
Weise wAL
Harris Co.

INTRODUCTION

Since the publication of Bulletin 24 of this series, additional
new Miocene species have been discovered and are described in
this number. With the exception of two species of Vassas, name-
ly WV. shaklefordensis and N. alumensis, the new shells are from the
material collected by the two Ecphora trips of 1914 and 1915,
and belong to the private collection of Professor G. D. Harris.
The two /Vassas referred to above, are in the Paleontological Mu-
seum of Cornell University.

The second Ecphora trip had for its ultima Thule, the city of
Newbern N. C. on the Neuse river. From there as a base, excur-
sions were made by land by the members of the party to various
fossiliferous localities. The interesting, type locality of the upper
Miocene or the Duplin Formation, namely Natural Well, was
visited by Karl P. Schmidt and the writer. By careful collect-
ing a large amount of good material was obtained and several
novelties discovered.

Several not able localities were visited by water and of these,
Rock Wharf, on the James river, north of Smithfield Va, deser-
ves mention. This is one of Conrad’s original localities from
which he described several species in his earlier papers. The
beds belong to the Yorktown formation, and have an abundant
and well-preserved fauna. Close to 300 species of mollusca are
known from this locality.

The last Ecphora trip, as well as the former, was conducted
under the personal supervision of Professor G. D. Harris, to whose
efforts, the success of the cruise was largely due. For the use
and study of the material collected, the writer is indebted to Pro-
fessor Harris. The willing aid and cooperation received from
the other members of the party is also highly appreciated.

Paleontological Laboratory,
Cornell University,
April 24, 1916 AXEL OLSSON

4 BULLETIN 27 I24

Mangilia magnoliana, n. sp., Pilate 2) Bigs rr

Shell large, slender, with the body—whorl more than one-
half the length of the shell; protoconch of about 3 whorls, the
tst smooth, soon followed by curved riblets and later with the
addition of 3-4 spirals; post-nuclear whorls 5; the spire-whorls
are strongly angulated a little above the middle; riblets 12-14
straight, on the whorls of the spire extending from the lower
suture upward and across the shoulder but soon disappearing,
the appressed suture being bordered by a broad band free from
transverse sculpturing; on the body-wnhorl, the spirals are fair-
ly regular and finely and closely frosted by transverse lines; a-
perture with a thin moderately expanded outer lip; canal some-
what bent.

Length 7.5, diameter 1.75 mm.

The frosting of the spirals is fine and requires a lens to be
seen. They are easily destroyed by weathering and erosion, but
generally some portion of the shell surface will reveal them when
examined.

Duplin formation; Natural Well, N. C.

Mangilia emissaria, nu. sp., Plate 2, Fig.6

Shell large, with the body-whorl more than one-half the total
length of the shell; whorl angulated; nucleus —; post—nuclear
whorls 5; suture distinct, not impressed; riblets about 8; on the
whorls of the spire, the riblets are strongest below the angulated
periphery, weaker above; spirals even, of narrow, flat bands, sim-
iliar over all and are not frosted; canal long and slender, slightly
bent; anal sinus not evident; aperture elongate with a thin out-
er lip.

Length ro, breadth 3, aperture 4.5, body-whorl 7mm.

Characterized by its large size and few riblets. It appears
to be arare species, the above description being based on a single
imperfect specimen.

Yorktown formation, Tar Ferry, N. C.

I25 MIOCENE FOssILs, OLSSON

Mangilia smithfieldensis, n. sp., Plate 2, Fig. 12

Shell moderately large and fairly broad; whorls of the spire
angulated; nucleus of about 3 unkeeled whorls, the rst smooth,
the 2nd with curved riblets, the 3d in addition with 8 spirals in
the interspaces between the riblets; post-nuclear whorls 4, angu-
lated; suture not impressed; riblets 11 or 12, extending from sut-
ure to suture, obsolete on the base and on the canal; spiral sculp-
ture of fairly even, wavy, unfrosted spirals; canal straight; a-
nal sinus not evident on any of the specimens examined; mouth
broad and fairly long, with a thin outer lip.

Length 8.5, breadth 3.5, aperture 4, body-whorl 5.5mm.

This species may be known by its unkeeled nucleus, even
unfrosted spirals and by the number of its ribs.

Yorktown formation, James river, north of Smithfield Va.

Drillia gastrophila, n. sp., Plate 1, Fig. 12

Shell heavy, of fair size with ribs and spirals, but without
a pronounced contracted subsutural band; protoconch blunt of
nearly 1% whorls, the first % turn smooth, followed by a turn
with 3 strong spirals, of which the lowermost appears first; the
change from the nuclear to the post-nuclear stage is abrupt; the
post-nuclear whorls are about 7, the first with 11 small ribs; the
first and the succeeding whorls of the spire have their ribs cut
by 2 spiral bands; the last whorl carries 6 spirals which are even
above but flatten out and merge with additional spirals below;
the suture is bordered by a heavy raised spiral, completely fil-
ling the subsutural zone at first, but latter only partially; body
whorl with about 13 ribs; anal sinus shallow.

Length 12, breadth 4, body-whorl 6, aperture 4mm.

The species may be known by its straight sided whorls, its
small contracted sutural zone with the strong spiral bordering
the suture and by the characteristic sculpturing of its post—nu-
clear whorls.

Duplin formation, Natural Well, N. C.

6 BULLETIN 27 126

Drillia belloides, n. sp., Plate 1, Fig. &

Shell pleurotomoid, belonging to the de/la group but larger
and more slender than the typical della; protoconch like that of
bella but with the ribbed stage much shortened and later with one
more spiral ; post-nuclear whorls 6; ribs 11-13, typically about
LI, not passing from suture to suture; subsutural band well-de-
fined and concave, without ribs and covered at first with low, even
spirals which later may become obsolete; the suture in young
shells may be bordered by a raised line; the earlier post-nuclear
whorls strongly angulated, below with 2 or 3 raised spiral bands;
on the later whorls and on the body-whorl, the spirals increase
and alternate with smaller ones; ribs on the body—whorl be—
coming obsolete below; mouth with the outer lip somewhat
thickened, and with a shallow anal sinus.

Length 12, breadth 4.5, body-whorl 4.5, aperture 4 Sau.

This species is distinguished from D. bella by its-more nu-
merous and less prominent ribs. These ribs do not pass from
suture to suture as they do in dela. The spirals are likewise
heavier and more irregular, size larger, with the sutural zone
well-defined.

Yorktown formation, James river, above Smithfield Va.

Drillia ecphore, n. sp., Plate 1, Fig. 3

Shell of a larger size than typical de//a to which it is rela-
ted; protoconch blunt, of about 2 whorls, at first smooth, then
with ribs and spirals; post-nuclear whorls about 7, with ribs
and broad, raised, ribbon-like spirals; body-whorl with 8 ribs
which pass well onto the contracted sutural band and also onto
the base but do not quite reach the anterior canal; the contracted
zone of the early whorls of the spire with 3 very low spirals;
below the contracted zone, the ribs are crossed by 3 raised flat-
topped spirals which later increase and become impressed; on
the body-whorl the sutural band is covered with fine and fairly
even spirals, generally about 7 in number; on the body-whori
the spirals are at first even but alternate on the anterior canal ;

127 MIOCENE Fossi1s, OLSSON

“I

suture bordered by a thickened band simulating a raised spiral;
mouth short, with thickened outer lip and a deep anal notch.

Length 14.5, breadth 5, body-whorl 7, aperture 4.5mm.

This species differs from true de//a by its larger size and in

the differences of its spirals which are low and more ribbon-like,
the spirals on del/a being fine and well-raised. The species agrees
with della in having the ribs extending up onto the contracted
subsutural zone, differing in this character as well as others from
Drilla belloides.

Duplin formation, Natural Well, N. C.

Drillia smithfieidensis, n. sp., Plate 1, Fig. 6

Shell elongate, with relatively small body-whorl and a well-
marked though shallow sutural zone;’ nucleus blunt of about 2
whorls, the first % turn smooth, followed by a turn with 4 spirals,
of which the 3d from above is the strongest and carinates the
whorls; post-nuclear whorls 7,with short smooth-topped ribs and
with the spirals in the form of broad flat ribbons; the 1st post-
nuclear whorl has the contracted zone well-defined and sculptur-
ed with 2 flat spiral bands, below with ribs and 3 spirals; the
succeeding whorls show a gradual increase in the number of the
spirals but these remain low and do not cross the ribs; body-—
whorl with 11 or 12 ribs, present only on the middle of the whorl
and leaving the base and canal sculptured only by the flat spirals;
spirals on the body—whorl about 9, fairly even above but irregu-
lar below; the 3d and 4th whorls have the edge of the suture
thickened, becoming on the succeeding whorls a wide raised
band ; mouth small, with a short canal, free from callus.

Length 14.5, breadth 4.5, body-whorl 6.5, aperture 4.5mm.

This species is readily distinguished by its elongate shape
and short body-whorl.

Yorktown formation; James river, north of Smithfield Va.

8 BULLETIN 27 128

Drillia me grawensis, n. sp., Plate 1, Fig. 13

Shell rather small, slender, sculptured with strong, widely
spaced riblets and with strong or obsolete spirals; sutural zone
flat and not prominent; nuclear whorls 3, the rst 2 smooth, the
last transversely sculptured by 3 or 4 smooth riblets; post-nuc-
lear whorls 5 or 6, the 1st with the transverse sculpture crossed
by 5 or 6 impressed lines, giving rise to spiral bands; on the
later whorls, the spirals tend to become obsolete, disappearing
entirely from the sutural band and leave the rest of the spire-
whorls with 3 or 4 wide spirals, these spirals become obsolete on
the body-whorl but a few still persist on the base and on the
canal; riblets on the body-whorl about 7, prominent and widely
spaced, absent from the appressed, smooth, sutural band and
from the base; mouth elongate, but not narrow, with the outer
lip thin; columella slightly bent.

Length 8, breadth 3.25mm.

This species belongs with D. limatula and lunulata. The few
heavy, widely-spaced riblets, the inconspicuous sutural band and
the presence of spirals on the base are diagnostic.

Duplin formation; Natural Well, N. C.

Drillia magnoliana, n. sp., Plate 1, Fig’s Io, 11

Shell moderate in size, slender, solid, polished and with the
whorls only slightly convex; the suture is bordered by a flat
band, generally defined by a line or groove; whorls about 9;
the body-whorl with about 15 or 16, oblique, straight riblets;
these riblets commence just below the periphery and pass up—
ward to the base of the sutural band, here they may become
obsolete or continue across in a direction about 135° to their
former; as a rule, the riblets on the sutural band are obsolete
below, but strong next to the suture; base of the body-whorl
without riblets; mouth subovate, with the outer lip thicken-

I29 MIOCENE FOSSILS, OLSSON

Ne)

ed and provided with a fairly deep anal sinus; canal short,
straight.

Length 11, 15, breadth 4, 4.5, body-whorl 5.75, 7.5, aper-
ture 4, 4.5mm.

This species is related to D. pseudeburnea of the lower Mio-
cene of Maryland and New Jersey. D. pseudeburnea has the rib-
lets continuous over the base and the anterior canal is some-
what longer.

Duplin formation; Natural Well, N. C.

Mitromorpha smithfieldensis, n. sp., Plate 2, Fig. 4

Shell small, fusiform, with sharp spirals and few obtuse ribs
which are most prominent on the whorls of the spire; nucleus
blunt of about 244 smooth whorls; 3 post-nuclear whorls, each
somewhat overhanging the following; the rst, sculptured with
4 spirals, heaviest below and with a small one bordering the
upper suture and separated from the 2nd by a wider interspace
than usual; on the succeeding whorls of the spire, a 5th spiral
may appear in the lower suture or just above; whorls angula-
ted by the 3th spiral; body-whorl with 14 spirals, the 1st 5
are heavy and sharp, the rest gradually become weaker anter-
-iorly; body-whorl with 8 ribs, present only on the middle; in
addition a fine almost microscopic sculpture of incised transverse
lines is present, showing best between the spirals; canal short,
nearly straight; columella with about 2 obscure folds; outer
lip simple.

Length 5.5, breadth 2 mm.

A well-marked species occurring most abundantly on the
James river north of Smithfield, its type locality, but also known
elsewhere.

Marginella taylori, n. sp., Plate/2;\ Fig. 1

Shell large, subcylindrical, narrow; apex covered entirely
by the last whorl but with no apical callus; aperture slightly

10 BULLETIN 27 130

longer than the length of the shell, narrow and with the sides
nearly parallel below, but curving above towards the apex; out-
er lip with a heavy varix, thickened near the middle, denticu-
lated within, the denticles strongest anteriorly, fairly regular in
the middle, absent from the posterior end; inner lip witha
small callus at the posterior end, the remainder without but
with 4 strong, subequal plications; these columellar plications
are somewhat oblique, with the most posterior one situated at
about the anterior third; surface of the shell weathered but
probably smooth and polished when fresh.

Length 47. breadth 22mm.

This species belongs to the group of Margznellas containing

M. antigua Redf of the Duplin Miocene and M. wilcoxtana Dall
of the Pliocene. The above shell 1s much larger than either of
these two, J7 antigua measures constantly about 31—34 mm,
while wzlcoxiana is much smaller (16mm). There seems also
to be a constant difference between faylost and antigua as re-
vards the position of the columella plications, being situated
more anteriorly in faylorz.

Named for Bayard Taylor, a member of the second Ec-
phora trip.

Yorktown formation; Chocowinity, N. C.

Marginella schmidti, n. sp., Plate 2, Fig. 13

Shell rather small, stout, polished, with an elevated spire
and large body-whorl; the body-whorl is widest just above
the middle; whorls 4; nucleus blunt; suture indistinct but
bordered by a prominent ridge defined by a spiral line below ;
growth lines quite evident, strongest and somewhat irregular
on the area bordering the suture; aperture narrow, somewhat
longer than the length of the body-whorl ; outer lip with a heavy
varix, grooved posteriorly at its attachment to the body-whorl;
outer lip denticulated within, the most posteriorly situated den-
ticle large and heavy, the others smaller, subequal or obsolete ;

13r MIOCENE Fossiis, OLSSON ie

columella with 4 subequal plications, the most posterior ones
are nearly flat, straight, the others somewhat oblique; these pli-
cations are surrounded by a thin wash of callus.
Length 8, breadth 4, body-whorl 6 mm.
The species may be distinguished from M7. denticulata by its
banded suture and by its peculiar lip.
The species is named for Karl P. Schmidt, a member of the
1st and 2nd Ecphora trips.
Duplin formation; Natural Well, N. C.

Mitra mauryi, n. sp., Plate 2, Fig’s 14, 15

Shell small, solid, coronate, with a coarse reticulate sculp-
ture of straight ribs and spirals ; nucleus large, blunt, smooth ;
post-nuclear whorls about 4, coronated above by means of a flat
or somewhat concave band bordering the slightly appressed su-
ture; the 1st post-nuclear whorl not coronated and with the
ribs quite prominent ; the succeeding whorls of the spire have
below the sutural band 6 nearly equal, raised spirals, separated
from each other by wide interspaces, above with only 2 or 3
spirals; the spirals do not noticeably nodulate the ribs and
show best on the intercostal interspaces ; the body-whorl with
16 spirals below the subsutural band; transverse sculpture of
numerous straight ribs numbering on the body-whorl about 34
extending from suture to suture, well over the base and anter-
ior canal; canal nearly straight with 3 strong folds on the col-
umella, the posterior one being the largest; outer lip with 5
or more long, faint plicze situated a short ousteuice within.

Length 4.5, breadth 2mm.

This species is very distinct from the other small Miocene
Mitras. May be told by the coronated character of the its whorls
and strong, persistant sculpture. The species is fairly abundant
on the James river, north of Smithfield, Va. A few specimens
from Tar Ferry, N.C,

Named for Dr. Carlotta J. Maury.

2 BULLETIN 27 132

Nassa smithiana, n. sp., Plate 1, Fig. 2

Shell small, solid, elongate, with heavy straight ribs and
spiral bands; nuclear whorls 2—3, small, smooth; post-nuc-
lear whorls flattened; ribs heavy and straight, occasionally
one 1s developed which is more prominent than the others and
may represent a resting stage; ribs on the body-whorl about
10; spiral sculpture consisting of bands, produced by incised
lines cutting both the ribs and the interspaces, these spiral
bands, on the body-whorl, number about 11 and are regular and
large, except the two uppermost, which are smaller; whorls of
the spire with 6 or 7 spiral bands; a deep smooth sulcus cuts
into the base of the body-whorl ; suture distinct, bordered either
by a smooth area or by small spirals; mouth small, rounded
or ovate, angulated above; outer lip heavy, denticulate within,
columella with a callus, denticulate ; siphonal fasciole strong.

Length 14, breadth 6, body-whorl 7 mm.

A very distinctive species, characterized by its elongate
shape, heavy ribs and even spiral bands, The species is fairly
abundant at Natural Well.

Named for Ernest R. Smith, a member of the 1st and 2nd
Ecphora trips.

Duplin formation ; Natural Well, N. C.

Nassa gastrophila, n. sp., Plate 1, Fig. 1

Shell large, with squarish whorls and oblique riblets cross-
ed by few coarse spirals ; whorls 5, with slightly convex out-
lines, angulated above near the suture ; body-whorl with 4 ob-
lique, narrow riblets, separated by wide interspaces ;_ riblets ex-
tending from the suture onto the base; the body-whorl with
g raised, subequal, spiral bands crossing both the riblets and in-
terspaces but do not noticeably nodulate the riblets; on the
penultimate whorl there are 5 spirals; both the riblets and the
spirals are crossed by fine lines which are oblique near the su-

133 MIoCENE Fossils, OLSSON 13

ture, more nearly parallel to the spirals elsewhere; a wide,
shallow sulcus encircles the base of the body-whorl ; outer lip
not heavy, with 6 long, internal lirations ; columella smooth,
below with a heavy callus, somewhat toothed on the border of
the anterior canal.

Length 22, breadth 13 mm.

The coarse spirals and few riblets are the main distinguish-

ing characters of this species.

Yorktown formation ; Chocowtntty, N. C.

Nassa alumensis, n. sp., Plate 2, Fig. 5

Shell small, globose, solid; nucleus of 3 smooth whorls ;
post-nuclear whorls 3, with few ribs and unequal spirals; the
body-whorl with 10 ribs which are most prominent on the mid-
dle, obsolete or absent on the base; the ribs are narrow with
wide interspaces; spirals consisting of raised, unequal bands,
numbering on the body-whorl about 18; on the penultimate
whorl, there are 6 spirals, the 1st 2 bordering the suture are
low, the next 5 are stronger, the 4th on the periphery, much the
the heaviest ; on the base, the spirals closely spaced and even ;
basal sulcus with spirals ; mouth ovate, angulated above, with
the outer lip provided with 6 or 7 denticles within, inner lip
smooth or with 1 denticle at its posterior end ; siphonal fasciole
strong, bordered on the columellar side by a ridge.

Fleight 6.5, breadth 4, body-whorl 4.25 mm.

A small species, somewhat like WV. dzdentata Emmons, but

with different spirals and mouth characters.
Miocene,; Alum Bluff, Fla.

Nassa consensoides, n. sp., Plate 2, Fig. 10

Shell small, with a large rounded body-whorl and a pointed
spire ; rather numerous, low, straight ribs, which are crossed
by unequal spiral bands; nucleus of 3 pointed whorls, smooth

14 BULLETIN 27 134

at first but with a few ribs on the later portion ; post-nuclear
whorls 5; the body-whorl with 15 straight, low ribs; spiral
sculpture of irregular bands; Ist post-nuclear, whorl with 6 e-
qual spirals; the other spire-whorls have generally 5 heavy and
6 fine spirals; the body-whorl with about 21 spirals, strongest
on the middle of the whorl; bordering the suture, there are 6
small, closely crowded spirals ; a small sulcus encircles the base,
covered with spirals; mouth ovate, angulated above; outer
lip thickened and denticulated within ; inner lip callused and

with a few denticles below; siphonal fasciole strong.

Length rr, breadth 6, body-whorl 6 mm.

This species is readily recognized by its large body-whorl,
pointed spire, and unequal, spiral bands. In general characters,
the species approaches JV. consensa Ravenel but is sufficiently
distinct for recognition and is the Miocene precursor of that
species.

Duplin formation; Natural Well, N. C.

Nassa shacklefordensis, n. sp. Plate 2, Fig. 4

Shell small, coronate, sculptured with straight ribs and few,
raised spirals; nucleus of 3 small, smooth whorls ; post-nuclear
whorls 4, shouldered above and with the area bordering the su-
ture with the ends of the ribs, with or without a spiral; on the
spire-whorl. there are 3 or 4 narrow, raised spirals which cross
both the riblets and the spaces between ;_ the riblets are some-
what granulated by the spirals ; interspaces between the spirals
very wide; on the body-whorl, there are 3 or 4 additional spi-
rals on the base; body-whorl with 14 narrow, straight riblets
with wide spaces between; mouth rounded, smooth or faintly
lirate within ; canal short, straight.

Length 6, breadth 3 mm.

This species in most of its characters is a diminuative JV.
trivittata. The resemblance is due to the coronate character of
the whorl, straight ribs and sharp spirals. Typical WV. ¢rivzttata
is not known from our east coast Miocene.

Miocene ; Shakleford, Va.

135 MIOCENE FossIis, OLSSON 15

Scala dupliniana, n. sp., Plate 1, Fig. 14

Shell small, slender ; whorls 3+, regularly convex and with
deep sutures between ; varices about 11, on the body-whorl be-
ing low, flat and each provided with a small hook above ;. spiral
sculpture between the varices of two kinds, a primary set of
strong, raised spirals and a secondary intermediate spiral be-
tween each two primaries ; on the whorls of the spire, the pri-
mary spirals number about 10, smaller more irregular on the
base of the body-whorl; in addition, the space between the pri-
mary spirals is sculptured with equal, transverse, raised lines, of
the same strength as the secondary, thereby producing a micro-
scopic reticulation ; a narrow band bordering the suture, is with-
out the spiral sculpture ; mouth round, thickened by the last
varix.

Length of specimen 5.5.mm ( 3 whorls )
Breadth 3 mm.

Distinguished by its low flat varices, hooked above, by
the spiral sculpture and microscopic reticulation of the spaces
between the primary spirals.

Duplin formation; Natural Well, N. C.

Scala sheldoni, n. sp., Plate 1, Fig’s 9, 15

Shell small, slender, with 3 +, regularly convex whorls;
varices 14, rather heavy, rounded and composed of several, flar-
ing laminze; varices alternating in their position on the ad-
joining whorls ; interspaces smooth or with obscure growth lines;
mouth round, with a heavy outer lip.

Length of broken specimen 5.5 mm.

This well-marked species may be distinguished by its
well-rounded whorls and heavy lamellated varices. On the ear-
lier spire-whorls, the varices are somewhat irregular in their
outlines and erose.

This neat little species is named for Dr. Pearl Sheldon of

16 BULLETIN 27 136

the Department of Geology of Cornell University.

Yorktown formation ; Kingsmill, Va, (type locality )
Grove Wharf, Va.

Scalalineata Say, var. magnoliana, n. var., Plate 1, Fig. 5

Shell moderately large, elongate, with 6 + whorls; whorls
rounded, with the suture distinct but not deep ; ‘varices small
and irregular, numbering on the body-whorl about 13; on the
base of the last whorl there is an elevated area well-defined by a
ridge above ; intervarical spaces with irregular spiral bands,
generally those situated on the periphery the strongest ; mouth
rounded with a very thick varix at maturity.

Length 14.5, breadth 6.5 mm.

This shell may prove to be distinct from the recent S. /n-
cata Say. The exceedingly heavy lip at maturity is most cha-
racteristic.

Duplin formation, Natural Well, N. C.

CERITHIOPSIS Forbes and Hanley
Heterocerithiopsis, n. subg.

Protoconch of — whorls ; the last nuclear whorl is strong-
ly angulated in the middle, with a resulting sharp periphery ;
above the periphery with numerous, curved, smooth riblets, be-
low, with two sets of riblets, which pass obliquely and intersect
each other at nearly right angles, thereby producing rows of
squarish pits; change tothe post-nuclear whorls abrupt.

Type, Cerithiopsts smithfieldensts, n. sp.

Cerithiopsis smithfieldensis, n. sp., Plate 1, Fig: 7

Shell small, elongate-conic, with slightly convex outlines ;
protoconch of 1 + whorls (the tip broken on my specimens ) ;
the last nuclear whorl strongly keeled ; above the peripheral
keel with 20 curved, oblique riblets, below with oblique riblets

137 MIOCENE FOossILs, OLSSON 17

which cross each other at right angles ; later whorls about 7,
the 1st 4 with only 2 tuberculated spirals, the remainder with 3;
the last spiral is introduced above the other 2 and soon equals
them in strength; riblets about 19, straight, extending from
the suture across the spirals and their interspaces ; the spirals
tuberculat ed by the riblets; suture distinct, excavated with a
small, smooth spiral within; base markedly flattened, with 2
smooth spirals, the uppermost commencing at the suture, the
2nd, just below; the rest of the base is smooth but occasion-
ally, an obscure spiral is present encircling the columella; can-
al bent to the left.

Length 4.25, breadth 7.50 mm.

May be known by its peculiar nucleus, flattened base of

last whorl and globose shape.

Yorktown formation, James river, north of Smithfield, Va.

Triphoris bartschi, n. sp., Plate 3, Fig. 7

Shell sinistral, elongate-conical, with nearly straight sides ;
nucleus of about 2 whorls, smooth at first or somewhat spiral-
ed, on the next turn with 3 strong, smooth, subequal spirals
which later decrease to 2 by the disappearance of the lowermost
one ; 9 post-nuclear whorls, with 3 or on the earlier whorls only
2 equal, moderately tuberculated spirals; riblets continuous a-
cross the whorl but not onto the base ; the riblets, on the last
whorl, number about 21 ; suture well-marked, with a fine smooth
spiral; base flattened, and with 3 (and an indication of a ath)
low, close, smooth spiral ; columella short, truncate and slightly
bent both to the right and backwards; canal open ; mouth large,
with the outer lip thin, oblique, expanded below ; anal sinus not
evident.

Length 7.5, breadth 7.75 mm.

The spirally sculptured nucleus without riblets, in having the
uppermost spiral of the later whorls the weakest and last to
appear, will separate this species from its Miocene allies.

Named for Dr. Paul Bartsch of the United States Nation-

18 BULLETIN 27 138

al Museum.
Duplin formation, Natural Well, N. C. (type locality)
Yorktown formation; James river, above Smithfield, Va.

Triphoris dupliniana, n. sp., Plate 3, Fig. 8

Shell sinistral, elongate-conic, with nearly straight sides ;
nuclear whorls 1+, the last turn with transverse ribbing and
2 peripheral carinz ; post-nuclear whorls 11, suture indistinct ;
the 1st 5 whorls, with 2 subequal spirals, on the 6th whorl, an
intermediate spiral makes its appearance and increases gradual-
ly in strength ; on the body-whorl, the uppermost spiral is the
strongest ; spirals tuberculated by 22 riblets which moreover ex-
tend somewhat diminished across the interspiral spaces ; base
sloping, with 3 smooth spirals; columella smooth; anterior ca-
nal moderately long, closed or nearly so and bent both to the
right and backwards ; mouth small, rounded ; outer lip oblique,
with a deep anal notch bodering the suture.

Length 5.75, breadth 1.75 mm.

This species belongs to the group of 77zphoris, such as 7.
melanura, which have only 2 spirals on the earlier post-nuclear
whorls, later 3, with the last spiral coming in between the other
2. The open, anal sinus and bent, tubular anterior canal are the
main diagnostic characters of this species.

Duplin formation; Natural Well, N. C.
Yorktown formation; James river, north of Smithfield, Va.

Circulus schmidti, n. sp., Plate 3, Fig. 16

Shell small, depressed, with the whorls flattened above and
below, and with 2 carinez bordering the upper and lower surfaces
of the shell; whorls about 4, the 1st 2% turns are smooth and
forms a small pointed spire distinctly elevated above the later
flattened whorls ; the remaining whorls with raised spirals which
commence coarse and alternating but soon become fine and re-
gular ; base with a deep, wide umbilicus, showing the whorls

139 MIOCENE Fossiis, OLSSON 19

well up to the apex ; the baseis more strongly spirally sculptur-
ed than the upper surface; the basal spirals are irregular and
minutely decussated by the growth lines; whorls strongly cari-
nated just above and below the periphery, and with the interme-
diate surface strongly sculptured with fine spirals similiar to
those found on the upper surface ; mouth oblique, rounded.

Greater diameter 1.75, height .75 mm.

Is readily determined by its possessing only 2 carinze and

by its flattened upper and lower surface.

Duplin formation , Natural Well, N. C.

Calliostoma harrisianum, n. sp., Plate 2, Fig. 7

Shell of usual size, conic, with straight-sided whorls, and a
narrow grooved periphery; base flattened or only slightly con-
vex ; whorls 5, separated by deep, excavated sutures ; upper sur-
face of whorls with 2 heavy, raised spirals, one bordering the su-
ture, the other at the periphery ; the space between these 2 pri-
mary spirals, carries 3 additional, smaller spirals ; the spirals
may be granulated or smooth, and the peripheral carina is fre-
quently double ; base flattened, imperforate, and strongly sculp-
tured with 6 or 7 smoothish spirals which are wider than their
interspaces ; mouth subovate, oblique.

Greater diameter 7.5, height 6.5 mm.

A well-marked species known at present only from King-

mills. Related to C. virginicum.
Yorktown formation , Kingmills, Va.

Calliostoma suffolkense, n. sp., Plate 2, Fig’s 8, 9

Shell moderate in size, depressed, with flat upper whorls, a
conic spire and angulated periphery ; base flattened, with a nar-
row steep-sided umbilicus which is smooth within ; just above
the periphery, a carina is present which is posterior to the suture
on the later whorls of the spire, lacking from the earlier ; whorls

20 BULLETIN 27 I40

5, the rst small and smooth, the 2nd and 3d with from 3-5 strong
spirals ; on the later whorls, the sculpture consists of fine, even,
raised spirals, covering the entire upper surface and the peripher-
al carina ; suture distinct, bordered posteriorly by the peripheral
carina, anteriorly by a narrow, flat space which is defined by a
2nd lower carina; base flattened, or only slightly convex, cov-
ered with fine spirals becoming coarser around the umbilcus ;
mouth subovate.
Greater diameter ro, height 8mm.

This is a local species, known at present only from Suffcelk.
The carina just above the periphery, the fine, even spirals and
the open umbilicus are the distinctive characters.

Yorktown formation ; Suffolk, Va.

Caliiostoma (Eutrochus) shackelfordensis, Plate 2, Fig. 3

Shell of moderate size, depressed, with flat upper whorls, a
conic spire and flattened base ; periphery with 2 prominent ca-
rine, grooved between ; umbilicus small; whorls about 5, the
1st probably smooth, the znd and 3d with 3, 4 or s raised, sub-
equal spirals ; on the later whorls, the spirals become low and
irregular, and assume the appearance of impressed lines ; on the
4th whorl, these spiral lines arecrowded close to the surture and
to the periphery, and with a smooth area between ; on the last
whorl, the whole space is covered with fine, even spirals ; suture
deep, excavated, the whorls coiling on the lower carina ; the su-
ture is bordered in front by a raised line which is either smooth
or beaded ; on the last whorl, this sutural line is made up of 3
spirals, similiar to those covering the rest of the surface of the
whorls ; base flattened with impressed spirals, small and regular
on the area bordering the periphery, few, coarse and groove-
like around the umbilicus; mouth subovate.

Greater diameter 9, height 7 mm.

This species may be compared with C. cyclus Dall which
it resembles in shape and general characters but differs from that
species in its manner of coiling. In C. evelus, the sutures are

I4i MIOCENE Fossils, OLSSON 21

closely appressed, the coiling being along the upper carina. In
C. shacklefordensis, the coiling is along the lower carina, thereby
producing a deep, excavated suture.

Miocene ; Shackleford, Va.

Teinostoma miocenica, n.sp., Plate 3, Fig,s 14, 15

Sheil small, solid, porcellanous ; whorls 3%, increasing ra-
pidly in size, through their close coiling; suture appressed, of-
ten indistinct ; nucleus of about 2 smooth whorls separated by
a fairly deep suture ; post-nuclear whorls with fine but even spi-
rals which are strongest on the area bordering the suture and on
the base ; umbilical area covered with a thin callus, over which
the spirals pass, and by a heavy thickening of the columellar
wall; mouth nearly round, oblique, with a thin, outer lip.

Greater diameter 2.25, lesser diameter 1.5, height 1.5 mm.

This species may be known by its covered umbilicus,
close coiling and spirally sculptured surface. 7. opsztelotus Dall,
is similiar in its method of coiling but is only obsoletely striated
and with an open umbilicus.

Duplin formation; Natural Well, N. C.

Teincsioma thompsoni, n. sp., Plate 3, Fig’s 3, 4

Shell very small, depressed, porcellanous, polished : whorls
about 3, the earlier, covered to a variable extent by the closely
appressed suture of the body-whorl; upper surface smooth,
with indistinct growth lines; the periphery when viewed from
above, shows fairly even radial groovings; base flattened; um-
bilicus covered; the basal surface strongly sculptured by ra-
dial grooves and growth lines; mouth oblique, subovate.

Greater diameter 1.5, lesser diameter 1.00, height .75 mm.

This species is related to 7. nanum Lea, a common and
widespread Miocene shell. It differs from that species in its
smaller size, more depressed shape, strongly sculptured base and

22 BULLETIN 27 142

periphery.
Named for J. D. Thompson a member of the 2nd Ecphora
trip.
Duplin formation ; Natural Well, N. C.

Pseudorotella bushi, n. sp., Plate 3, Fig’s 5, 6

Shell small, much depressed, polished, porcellanous ; whorls
3, enlarging uniformly ; suture rst deep and distinct, later be-
coming appressed and bordered with an impressed band; sur-
face smooth and shining, with irregular growth lines and general-
ly with fairly regular groovings on the periphery, which may ex-
tend well up onto the upper surface; base flattened, with the
body-whorl large, and through the spreading of its columellar
wall closing the umbilicus or leaving a small perforation ; the
umbilical region is outlined by a small ridge or spiral; base
strongly sculptured by close-set growth lines and with fairly
even radial grooves, extending over the base and onto the pe-
tiphery ; mouth round, oblique.

Greater diameter 1.60, lesser diameter 1.20, height 6 mm.

I am referring to the genus Pseudorotella Fischer, the Mio-
cene species described as Zeznostoma calvertense Martin and 7.
vortex Dall. T. vortex isa larger species and perfectly smooth
except for the incremental growth lines. 7. calvertense of the
lower Miocene is more closely allied to dushz, but our shell may
be distinguished by the radially grooved periphery and more
strongly sculptured base.

This species is named for Dr. Katherine Bush for her work
on the smaller gasteropods of the recent Atlantic fauna.

Duplin formation, Natural Well, N. C.

Ethalia alexanderi, n. sp., Blatezkio7Semnse2nnes

Shell small, solid, porcellanous; spire low and rounded ;
whorls 3, the rst turn small, the others much larger; suture
distinct between the later whorls, indistinct between the earlier,

143 MIOCENE FossIis, OLSSON 23

generally with an impressed area in front ; surface smooth, pol-

ished with fine incremental growth lines; mouth round, with

a heavy callused columella, behind which is a small umbilical

chink ; the umbilicus is faintly outlined by a small spiral line.
Greater diameter 2.25, height 1.50 mm.

This species is related to the recent shells, placed by Dall in
the genus “thalia, namely reclusa, suppressa and solida, all of
Dall, and in order to associate the Miocene species with those
shells, Iam referring it to the genus Atala rather than to 7ezno-
stoma. ‘These two genera have long been incorrectly used judg-
ing from their respective types.

Named for C. P. Alexander of the 2nd Ecphora trip.

Duplin formation; Natural Well, N. C.
Yorktown formation; James river, north of Smithfield, Va.

Molleria harrisi, n.sp., Plate 3, Fig’s 18, 19

Shell very small, solid, naticoid in shape with a very small
spire and rounded whorls ; whorls 2-3 with a moderately large
nucleus; whorls solid, rounded, smooth above, with a well-marked
suture ; the early whorls are always smooth and generally show
but little weathering, the last frequently chalky and eroded;
base with a narrow, deep umbilicus, angulated above and with
2, 3 or more spirals, mostly widely spaced above, closer below,
descending spirally into the umbilicus ; umbilicus bordered by
15—2o0, radially incised lines, extending but a short distance
out over the base from the umbilical angle ; last whorl rapid-
ly descending ; mouth rounded, angulated at its attachment
to the preceding whorl, internally with a well-marked opercu-
late shelf.

Greater diameter 1.00, height 7.00 mm.

This appears to be a common and wide-spread species in the
upper Miocene. MY. harrist and the following species, may be
separated from JZ. minuscula of the lower Miocene by their sculp-
tured bases. MM. harrisi has in addition to the spirals which may
be either strong or weak, the constant presence of short radially

24 BULLETIN 27 T44

incised lines. This last named character will separate it from
M. smithfieldensis.
This interesting little shell is named for Professor G. D. Har-
ris of the Department of Paleontology of Cornell University.
Duplin formation, Natural Well, N. C.
Yorktown formation; Tar Ferry, N. C.
James river, north of Smithfield, Va.

Molleria smithfieldensis, n. sp., Plate 3, Fig. 17

Shell very small, naticoid; spire prominent and elevated ;
suture distinct and deep ; whorls about 3, solid, rounded and
smooth above with spirals on the base; last whorl somewhat
descending; upper surface smooth, with indistinct lines of
growth ; base with a deep umbilicus, not angulated above and
with strong spirals, the ist 3 (in and around the umbilicus} e-
qual and separated by relatively wide interspaces, the others al-
ternate in strength and rapidly become obsolete and dissapear
towards the periphery ; the rst spiral is within the umbilicus,
the 2nd and 3d, may beconsidered as outside ; the specimen shows
4 other alternating spirals and afew, very obscure ones nearer
the periphery ; mouth rounded, somewhat angulated above and
only slightly attached, internally showing the operculate shelf.

Greater diameter 1.00, height .75 mm.

A series of specimens show some variation in the strength
and persistence of the basal spirals. Usually, they are as de-
scribed above, but occasionally the spirals may continue onto the
periphery and also on the upper surface. The species lacks the
radial, incised, basal lines of 17. harrisz.

Yorktown formation : James river, north of Smithjield, Va.

Cyclostremelia magnoliana, n. sp., Plate 3, Fig’s 9, 10

Shell minute, consisting of about two whorls, planorboid in
their coiling and enlarging but slowly ; suture deep and dis-
tinct ; upper surface smooth, glossy, with very indistinct, radi-

45 MIocENE FossILs, OLSSON 25

al depressions parallel to the growth lines; base with a wide,
funnel-shaped umbilicus, bordered by two, fairly strong, raised
spirals, with fainter spirals nearer the periphery ; aperture near-
ly quadrangular, markedly expanded and flattened below, above
angulated near the parietal wall.

Greatest diameter 1.5, height .7 mm.

The species here described, agrees in its fundamental char-
acters with C. humilis Bush, a recent Hatteras shell, and type
of the genus Cyclostremella Bush. The most obvious differ-
ences to be noted in the Miocene shell are its smooth, upper
surface and more strongly striated base.

Duplin formation; Natural Well, N. C.

Psammobia gubernateria Glenn, var. daiti, n. var., Plate)2; vkis.)2

In the Miocene at Chocowinity, N., C. a form of Psammo-
bia occurs quite plentifully but rarely in perfect condition.
These shells are close to the Maryland Psammobza described
by Glenn as guzoernatoria. They differ in a few characters, which
on future reseach may prove constant enough for their specific
separation. I have a fragment of a large Psammobia from
Kingsmill Va, evidently the same as the North Carolina shell,
thus indicating a fairly extensive range during Yorktown times.

The North Carolina shell is larger and porportionally long-
er, and with the beaks more centrally located ; the surface is
smooth, with incremental growth lines which are deeper and ir-
regular on the posterior slope; a small callus is frequently dev-
eloped just in back of the beaks.

Length 62, height 32 mm.

Aligena pustulosa Dall, var. choptankensis, n. var., Plate 3, Fig. 1

Aligena pustulosa Glenn, Maryland Geol. Surv., p. 334 (not description,
nor figure); not of Dall, 1898.

Shell in shape like A. pustulosa Dall, but somewhat wider
and of a general larger size ; surface posterior to the carina with

26 _ BULLETIN 27 146

strong, numerous, subequal, concentric lamellose lines; on this
area, the pustules are lacking or if present very small and incon-
spicuous ; anteriorly the concentric sculpture is less strong and
quite irregular ; a radial sculpture is present, consisting of rais-
ed irregular striz which may break up into numerous, small,
nearly continuous pustules on approaching the basal margin ;
other characters similiar to the type form.
freight. 7.5, width 8 mm.

Four specimens of this shell from Jones Wharf, Maryland,
all show the above characters, differenting them from the typical
A. pustulosa Dall. In their shape, strong carina and in other
general features, the shells agree with their Oligocene precursor.

Choptank formation ; Jones Wharf, Md.

Lithophaga pectinicola, n. sp., Palte 3, Fig. 2

Shell elongate, subcylindrical, thin and fragile ; with the
dorsal and ventral sides straight, and nearly parallel; beak
nearly terminal; anterior end well rounded, posterior produc-
ed and obtusely pointed ; external surface smooth with the
erowth lines faint ; the surface is in addition quite strongly
marked with regular resting stages, most evident on the post-
erior slope.

Length 12, height 4 mm.

The type specimen was found in a large Pecten shell from
Yorktown, Va. It isa typical Lithophaga and may be distin-
guished by its cylindric and elongate shape, with ventral and
dorsal sides nearly parallel. The posterior extremity is produced.

Yorktown formation , Yorktown, Va.

147 MIOCENE FossiILs, OLSSON 27

CHANGE OF NAMES

Drillia emmonsi, new name, proposed for Pleurotoma tubercu-
lata Emmons 1858, Rept. N. C. Geol. Survey., p. 265, fig. 147.,
preoccupied by Pleurotoma tuberculata Pusch, 1837, Pol. Paleont.
paras tava, ws tiga. b:

Drillia cornelliana, new name, proposed for Pleurotoma ele-
gans Emmons 1853, Rept. N. C. Geol. Survey, p. 265, fig. 146.,
preoccupied by Pleurvotoma elegans Defrance 1826, Dict. des sci.
nat. 41, Pp. 395., also by Sacchi, 1836, Nat. Conch. foss. Gravi-
BEB AC (D Alaly Uehye 3ty lite toy

Fig. 1.

16.

BULLETIN 27 148

EXPLANATION OF
PLATE 1 (24)

Page
Nassa gastrophila, n. sp., 12° (132)
Ventral view of the type specinien enlarged about 11% times.
Nassa smithiana, n. sp., 12 (132)
Dorsal view, enlarged 2% times.
Drillia ecphore, n. sp.,
Ventral view, enlarged about 274 times.
Mitromorpha smithfieldensis, n. sp., 9 (129)
Type specimen enlarged 6 times.
Scala lineata var. magnoliana, n. vat., 16 (136)
Ventral view of type enlarged about 3 times.
Drillia smithfieldensis, n. sp., 7 (127)

Type specimen from Smithfield, enlarged 2.7 times.
Cerithiopsis (Heterocerithiopsis) smithfieldensis,n. sp., 16 (136)
Type specimen enlarged about 6 times.

Drillia belloides, n. sp., 6 (126)
Specimen from Smithfield, enlarged 3 times.

Scala sheldoni, n. sp., 15 (135)
Type specimen, enlarged about 6 times.

Drillia magnoliana, n. sp,, 8 (128)
Ventral view of type, enlarged 2% times.

Drillia magnoliana, n. sp., 8 (128)
Dorsal view of a larger specimen, enlarged 2 times,

Drillia gastrophila, n. sp., 5 (125)
Type specimen, enlarged about 3 times.

Drillia mcgrawensis, n. sp., 8 (128)
Ventral view of type, enlarged about 4 times.

Scala dupliniana, n. sp., 15 (135)
Ventral view of type, enlarged about 5 times.

Scala sheldoni, n. sp., 15 (135)
A smaller specimen, enlarged 6 times

Drillia gastrophila, n. sp., 5 (125)

A small specinien showing the strong carina bordering the suture.

PI. 24. Vol. 5. Bull. Amer. Pal.. No. 27, Pl. 1

Fig. 1.

14.

15.

BULLETIN 27 I50

EXPLANATION OF
PLATE 2 (25)

Marginella taylor, n. sp., 9 (129)
Ventral view of type, slightly enlarged.

Psammobia gubernatoria dalli, nu. var., 25 (145)
Exterior view of right valve of type, natural size.

Calliostoma shaklefordense, 1. sp., 20 (140)
Ventral view of type, enlarged about 3 times.

Nassa shaklefordensis, n. sp., 14 (134)
Ventral view of type, enlarged about 4% times.

Nassa alumensis, n. sp., 13 (133)
Type, enlarged about 4 times.

Mangilia emissaria, n. sp., 4 (124)
Ventral view of type, enlarged about 4 times.

Calliostoma harrisianum, n. sp., 19 (139)
Type specimen from Kingsmill, Va, enlarged about 3 times.

Calliostoma suffolkense, n. sp., 19 (139)
Upper view, enlarged about 2% times.

Calliostoma suffolkense, n. sp., 19 (139)
Lower view, enlarged about 214 times.

Nassa consensoides, nu. sp., 13, (133)
Type specimen, enlarged about 2% times.

Mangilia magnoltana, n. sp., . 4 (124)
Specimen enlarged 4% times.

Mangilia smtthfieldensis, un. sp., 5 (125)
Specimen enlarged about 3 times.

Marginella schmidti, n. sp., to (130)
Specimen from Natural Well, enlarged 3 times.

Mitra mauryt, n. sp., it (131)
Type, enlarged 6 times.

Mitra mauryt, n. sp., ir (131)

Ventral view of a smaller specimen.

PI. 25, Vol. 5, Bull. Amer. Pal., No. 27, Pl. 2

yn nen tate rd ID

AY
+
:

nome

He
Bag. t.

225

fo.

BULLETIN 27

EXPLANATION OF

PLATE 3 (26)

Aligena pustulosa choptankensts, n. vat.,

Specimen enlarged 3 times.
Lithophaga pectintcola, 0. sp.,

Left valve of type, enlarged about 3 titmes.
Tetnostoma thompsont, n. sp.,

Upper view, enlarged 12 times.
Teinostoma thompson, n. sp.,

Lower view of same specimen.
Pseudorotella busht, n. sp.,

Lower view of a specimen considerably enlarged.

Pseudorotella busht, n. sp.,

Upper view of a specimen.
Triphorts bartschi n. sp.,

Type specimen, enlarged 6 times.
Triphoris duplinianus, n. sp.,

Specimen enlarged about 6% times.
Cyelostremella magnoliana, u. sp.,

Basal view, enlarged about 15 times.
Cyclostremella magnoltaua, 1. sp.,

Upper view of same specimens.
Ethalia alexandert, u. sp.,

Upper view, enlarged Io times.
Ethalia alexandert, n. sp.,

Ventral view, enlarged ro times.
Ethalia alexander, n. sp.,

Basal view.
Tetnostoma mtocenicum, Nn. sp.,

Upper view, enlarged 9 times.
Teinostoma miocenicum, Nn. sp.,

Basal view.
Circulus schmidt1, n. sp.,

Upper view of type, enlarged 12 times.
Molleria snithfieldensts, n. sp.,

Basal view showing spirals, enlarged 23 times.
Molleria harrist, n. sp.,

Ventral view, enlarged 20 times.
Molleria harrist, n. sp.,

152

we (IB)
18 (138)
24 (144)
24 (144)

22 (142)

23 (143)

Basal view showing the spirals and radial lines, 22 times.

Pi. 26, Vol. 5, Bull. Amer. Pal., No. 27, Pl. 3

Vol. 5

BU Ee ETINS

AMERICAN

PALEONTOLOGY

No. 28

The Murfreesboro Stage of Our East Coast Miocene

By AXEL OLSSON

February 10, 1917

Harris Company
Cornell University, Ithaca, N. Y.
We Se 2s

ane & N

Des
is ran y js
Vang!

i
it

ie Re i)

THE MURFREESBORO STAGE OF OUR EAST COAST
MIOCENE
BY

AXEL OLSSON

CONTENTS

INTRODUCTION

POSITION AND LITHOLOGY

AREAL DISTRIBUTION AND FORMER CORRELATION
AGE DETERMINATION AND PALEONTOLOGY

THE MARYLAND MIOCENE

GENERAL CORRELATION

INTRODUCTION

Forming a no small part of the sedimentary deposits com-
posing the northern half of our eastern Coastal Plain in New
Jersey, Maryland, Virginia and North Carolina are the beds
collectively known as the Miocene. They consist of clays,
sands, marls or their mixtures, often with an abundant and inter-
esting fauna, which has been the subject of study of several
paleontologists since the time of Thomas Say. On the basis of
faunal differences and stratigraphy, the series may be divided
into stages; and, when these are studied, the former transgres-
sions of the Miocene sea at the corresponding ages are deter-
mined. The stages which may be recognized at present, are the
following:

Upper | Duplin stage, south of the Hatteras axis
Upper

Yorktown stage, north of the Hatteras axis
Lower—Murfreesboro stage (ez)
Middle—St. Mary’s stage
Upper—Choptank stage
Lower } Lower—Calvert stage

4 BULLETIN 28 156

It is the purpose of the present paper to name and charac-
terize the new Miocene stage, occupying, as indicated above, a
position in the lower Upper Miocene, that is, between the St.
Mary’s and the Yorktown stages. To this group of beds the
name, the Murfreesboro stage, is here proposed; and for its type
exposures, the Miocene at Murfreesboro, N. C., and along the
Meherrin river in the immediate vicinity of Murfreesboro, is se-
lected, although a number of other places in North Carolina or
Virginia would serve equally well. Throughout its areal distri-
bution, the stage is uniform and in many respects represents the
most typical expression of our east coast, or cold water Miocene
to which the name Chesapeake is generally given. After its
close, and during the Yorktown, changes towards the warmer
Pliocene were inaugurated and new faunal elements introduced.

POSITION AND LITHOLOGY

The Murfreesboro stage consists of blue sandy clays, immedi-
ately overlain by the yellow sands and light-colored marls of the
Yorktown stage; and, owing to the general seaward dip of this
region, its distribution is more inland and to the west of the lat-
ter. Where the basal beds are exposed, they are seen to rest
upon a number of different formations. At Petersburg, it is wpon
the Cretaceous, or upon the crystallines or metamorphics of the
Piedmont Plateau. When on the latter, the clay contains a
considerable admixture of quartz and other crystalline fragments.
The same condition obtains at Halifax,N.C. as it does at any lo-
cality in the immediate vicinity of the crystallines. The beds rest
upon Eocene at Ruffin’s and Evergreen, Virginia, and, in the
northern part of their range, upon some member of the Miocene
series.

AREAL DISTRIBUTION AND FORMER CORRELATION

The areal distribution of the Murfreesboro stage is from
about central Virginia to central North Carolina. Known ex-
posures in Virginia are found along the York river, and on the
Pamunkey river as near West Point. The whole series of blue

157 MURFREESBORO STAGE

OLSSON 5

clays found beneath the Yorktown stage on the James river
belong to the Murfreesboro, as do the beds of similar lithology
and stratigraphic position in northern and central North Caro-
lina, as for examble at Halifax, Greenville, etc.

This stage has in general been misinterpreted, and differ-
ent parts correlated with different portions of the Miocene series.
The presence of beds of diatomaceous earth, seemingly in a con-
tinuous belt extending south from Maryland (as for example at
Petersburg, Va.), and apparently closely associated with these
beds, has led to their direct correlation with the similar deposits
of the Calvert stage of Maryland. The evidence furnished by
the more wide-spread and better known molluscan fauna is more
trustworthy and should therefore be given more consideration
than the presence of diatomaceous beds which might as well as
not have been developed at different periods.

Heilprin* in 1884, although recognizing an intimate relation
of the Virginian fossils to each other and therefore indicating a
nearly uniform age, still held to his anomalous view, earlier ex-
pressed, of the continuation of his Marylandian or older Miocene
south into Virginia and North Carolina, representing there the
northern faunal horizon. He attributed this seeming dif-
ference in characteristics to ‘‘imperfect observation or lack of ob-
servation.’’ In 1904, Dallt compared the Maryland Miocene
with other well-known localities. On the basis of the percent-
age of recent species, these localities were arranged in a series to
show their relative ages. In this scheme, the Petersburg beds
(included now in the Murfreesboro stage) were considered as be-
ing very old and beneath the Calvert or synchronous with it.
For various reasons, final correlation by the percentage of the
molluscan species which have survived to the present;day cannot
be relied upon for exact and detailed work. This principle is of

*Contributions to the Tertiary Geology and Paleontology of the United
States, pp. 15, 16.
+Maryland Geological Survey, Miocene volume, pp. cxlvii, exlviii.

6 BULLETIN 28 158

use in pioneer work, but should be replaced by the more accu-
rate evidence furnished by the identity or similarity of
faunas. In 1912, Clark and Miller* referred the beds at Peters-
burg and those mentioned above on the Pamunkey river to the
Calvert stage, and the remainder of the Murfreesboro stage as
here defined to the St. Mary’s. It should not be understood
that no Calvert or St. Mary’s is known in Virginia, as both are
well represented in the northern or northeastern part of the
state. In North Carolina, the stage includes all of the so-called
St. Mary’s of the same workers.}

AGE DETERMINATION AND PALBRONTOLOGY

Stratigraphically, the stage occupies a position immediately
below the Yorktown, apparently conformable with it and thus in
a manner its upper age limit is not sharply defined. For more
precise age determination, the fossil evidence must be considered,
and in itself is conclusive. An analysis of the Murfreesboro
fauna corroborates the stratigraphic evidence and indicates a
much closer relationship with the Yorktown than with the St.
Mary’s, or older beds. A considerably larger percentage of spe-
cies are common to the Yorktown than to the Marylandian Mio-
cene and the whole aspect of the fauna is of a more recent and
advanced type. Several of the species of mollusks which have
continued up from the lower and Middle Miocene show notice-
able evolutionary changes, correlative with time, being either
more. perfect or having assumed senile characteristics. An ex-
ample which might be cited is Glycymerts subovatus, a species
commencing first in the upper Oligocene, where it is small, con-
vex and rounded in outline. It is similar but rare in the lower
and Maryland Miocene, becomes large and very abundant in the
Murfreesboro, generally losing its convex form and becoming de-
pressed with senility, indicated by an increase in thickness of the

*Virginia Geological Survey, Bull. 4.
TNorth Carolina Geological and Economic Survey, vol. 3.

£59 MURFREESBORO STAGE—OLSSON

shell, variability of form and obsolescence of its sculpture.

The best and most widely known of our Miocene fossils is
the peculiar and interesting gasteropod Acphora quadricostata.
This species commences first in the Choptank, where it is repre-
sented by a widely umbilicated form, generally separated as the
variety umbzlicata of Wagner. In the St. Mary’s beds the spe-
cies becomes typical, continues up into the Murfreesboro and
Yorktown stages, where it is large and often abundant. It is
pre-eminently a cold water or Chesapeake species, and during
Murfreesboro time, as will subsequently be shown, followed the
Chesapeake fauna south into South Carolina and into Florida.
During the milder portion of the Upper Miocene, the species
persisted in the cooler portions of its range, that is, in the
Yorktown basin north of the then already defined Hatteras axis.
It is lacking from the more southern, warmer, but synchronous
Duplin beds.

To the Murfreesboro stage belongs the distinction of having
more species of Pectens than any other of our Miocene stages.
Of the commoner Maryland species, all are represented except
the Lower Miocene Pecten humphreysti and marylandicus. Pecien
Jeffersonius and madisonius have continued up from the Lower
and Middle Miocene. Several species are peculiar. The Upper
Miocene Pecten eboreus, makes its first appearance, becomes com-
mon and the dominant form in the Yorktown and the Duplin
stages. Nearly confined as a fossil to the Murfreesboro and char-
acteristic of it is Pecten clintontus, which in some localities is ex-
tremely abundant. The species is very rare in younger beds,
but evidently persisted to the present day, the recent P. magel-
lanicus , by many being considered identical. The species which
are grouped around P. vivginianus and decemnarius are nearly
peculiar to the stage and are good index fossils.

Another group of the monomyarian pelcypods, abundant in
the Murfreesboro stage, are the oysters, represented by about
two species, namely O. disparilis and sculpturata. ‘These two
species are not known in Maryland, but are common and wide-

8 BULLETIN 28 160

spread in the Murfreesboro, Yorktown and Duplin stages.

The mactroid Mulinia congesta is an upper Miocene species
not recorded from the St. Mary’s or older beds. It is by far the
commonest pelecypod of the Murfreesboro stage.

Amongst the gastropods, the Maryland Busycons such as
B. coronatum and fusiforme are entirely lacking, their place being
taken by the larger and more modern species as B. maximum
and zzezle.

The Calliostomas, the smaller Nassas, Turritellas, all offer
the same evidence. The whole fauna being distinctly of an up-
per Miocene type.

Since the Murfreesboro stage is older than the Yorktown, it
is natural to expect that it should exhibit.closer relation with the
St. Mary’s than is the case with the Yorktown.

Several species of Isocardias are abundant in the Maryland
Miocene but are rare or entirely absent in the Yorktown and
Duplin stages. They are well represented in the Murfreesboro
and often extremely abundant in certain clay beds.

The geologic range of Melina maxillata is interesting, and
the presence of this species associated with an upper Miocene
fauna is the best criterion for the field identification of the Mur-
freesboro stage. This species is very abundant in our Lower
Miocene, especially in the Choptank. It continues through the
St. Mary’s into the Murfreesboro and there sometimes equals,
as far as number of specimens is concerned, its former import-
ance in the Choptank. The species, so far as my knowledge
goes, is entirely lacking from the Yorktown and Duplin stages.

THe MaryviAnp MIocENnE

Since the Murfreesboro stage has frequently been correlated
directly with the St. Mary’s or older beds, a brief review of the
more important paleontological characteristics of the Maryland
Miocene may be of interest.

In many respects, the Miocene of Maryland is a unit, its dif-
ferent parts being more intimately related to each other than to

16I MURFREESBORO STAGE—OLSSON 9

outside Miocene. ‘This relation is illustrated beautifully amongst
the gastropods where the whole aspect of several families of
shells is markedly different between the two states. For example in
the family 7urritide (Pleurotomide), the prevalent generic types
in Maryland are 7urris and Surcula, while that of the Drillia-
like forms are much less in evidence. In the Murfreesboro and
the Yorktown, not a single species of the genera Zurrzs and Sur-
cula are known, while Drzliza is very abundant both in species
and individuals. The smaller Nassas of the upper Miocene have
a distinctly modern appearance, very different from the Lower
and Middle Miocene species. Another example might be
selected from the Zerebvide. In the Maryland Miocene this
family is well represented by the genus /Zastu/a and compara-
tively few true Terebras. The genus Has/ula is entirely unknown
in the Virginia and Carolinian Miocene. Its place is taken by
a multitude of true Terebras, many of which are related to recent
types. Further examples are unnecessary, but a number of
others could be selected and would furnish much the same sort
of evidence. :

The highest stratigraphic stage of the Maryland Miocene is
the St. Mary’s and therefore approaches most nearly the age of
Murfreesboro. Its fauna is peculiar, easily identified and of
rather limited distribution. It is well developed at its ty pe ex-
posures along the St. Mary’s river, at Cove Point, and Langley’s
Bluff, Md. In New Jersey, the stage has been recognized in
several deep wells, as at Atlantic City, Wildwood, etc. In north-
ern Virginia, beds of the same age occur along some of the north-
ern rivers as on the Rapphannock.

In Maryland, where the St. Mary’s stage is best known, it
is characterized essentially by a gastropod fauna. At its type
exposure, the following forms are very abundant: Acton ovoides,
Flastula simplex, Turris communis, Raphitoma parva, Crassispira
incilifera, Busycon coronatum, fusiforme, Buccinofusus parilts,
Nassa peralta, Turritella plebeta, Calliostoma humile. Amongst
the pelecypods, the more conspicuous are Spisula subponderosa and

Ke) BULLETIN 28 162

Arca idonea. Most of these species are peculiar to the St. Mary’s,
but a few have continued up from the Choptank and the Calvert,
or are there represented by closely related forms. None of these
species are known, except in a modified form in higher beds

_ GENERAL CORRELATION

In Virginia and North Carolina, the Murfreesboro stage is
distinguished by having an Upper Miocene fauna associated with
a small percentage of species which have continued up from the
Lower Miocene, and a few which are peculiar, and therefore con-
stitute index fossils. By means of these index fossils, and the
general evidence furnished by the whole fauna, correlation with
more distant Miocene deposits becomes possible.

For many years Tertiary beds have been known on Gay
Head, Martha’s Vineyard, Massachusetts, and a part of this
group belongs to the Miocene series. Dall*, in 1894, visited the
locality for the purpose of studying the fauna. He listed about
thirty-three species of fossils of which twenty-two are mollusks.
Significant species, and correlating with more southern Miocene,
are Cardium virginianum, an index fossil of the Murfreesboro
stage, and Glycymeris reflexa of the Murfreesboro and Yorktown.
The beds therefore seem to be of Murfreesboro age, a conclusion
which Dall himself practically reached. His statement is as fol-
lows: ‘‘As regards correlation with the divisions of the Southern
Miocene it may be said 1: that the Gay Head Miocene is Chesa-
peake and not older; and 2, that it belongs in all probability to
the upper part of the Chesapeake, certainly not lower than the
St. Mary’s fauna, and probably between that and the Yorktown
bedsii7

In Florida, Miocene deposits are exposed in a narrow belt
extending across the northern part of the state. During their
deposition, a strait existed which connected the Atlantic with the
Gulf and severed Florida from the mainland.

*American Journal of Science, vol. 48, pp. 296-300.

163 MURFREESBORO STAGE—OLSSON II

At Alum Bluff, Miocene beds are exposed overlying uncom-
formably the Upper Oligocene. The contained fauna is strictly
a southward extension of the Chesapeake and not of the nearer
and warmer Duplin Miocere. Lithologically, the beds consist
of blue or gray sands and are characterized by an abundant mol-
luscan fauna of which the following species are noteworthy and
of value for correlation.

Mulina congesta is the commonest fossil (range Murfreesboro-
Pliocene), Ostrea disparilis (Murfreesboro- Yorktown and Duplin),
Cardium virginianum (Murfreesboro), Pecten eboreus (Murfrees-
boro-Pliocene), Lcphora quadricostata (St. Mary’s-Yorktown),
Busycon maximum (Murfreesboro-Pliocene). These beds there-
fore correlate very well with the Murfreesboro of Virginia and
North Carolina.

In South Carolina, Miocene is known to occur at several lo-
calities and available evidence indicates that two horizons or
stages are represented. Since the appearance in 1857 of Tuomey
and Holmes work on the Miocene and Pliocene faunas of that
state, comparatively little has been done, so that the distribution
of the Miocene faunas is known only ina general way. Inan
eatlier paragraph the geological range and distribution of Ec-
phora quadricostata was considered and shown to be a cold water
or Chesapeake species and lacking from the warmer Duplin beds.
Its range is St. Mary’s to the Yorktown. In South Carolina,
E:cphora quadricostata is recorded by Tuomey and Holmes from
the Miocene of the Pee Dee river. The age is therefore either
St. Mary’s or Murfreesboro, more probably the latter.

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AMERICAN

PALEONTOLOGY
Nom 5

INNGUM PHBE IR 2S

Santo Domingo Type Sections and Fossils

By
CARLOTTA JOAQUINA MAURY

ASE

March-April, 1917

Harris Company
Cornell University, Ithaca, N. Y<
Rare ne

SANTO DOMINGO TYPE SECTIONS AND FOSSILS
PAR ae MOmU Use

SOMMARVAOP GON LENS.

TEXT
PAGE

LEN RO DW CATON Sonos cn Me ec Neee re eReader Sete 1-2

SIGH AGE OF MDE EXPE DITT ON eate soaeeee ee eeaie 5 -1a2 Neen re 3-10
Personnel, 3; Route, 3.

IVI TTS WANS serene oisls cola el ole egos sonnet ee Neola eee sinere relate ee 11-251
Gastropoda 2025.0 eater Pe ean Sone aM
SEamnopodar sss. h.n es ee ee een a ety At sae ... 158-160
Pelecy mod aug a aces el nec naa OMe s eal h suena 161-235

EO XG EI AVNT ACTION OH EST AUIS ot trea ty ets seats act eo srl peclee 236-251

ILLUSTRATIONS
FRONTISPIECE (Pl. 1): Cercado de Mao and Samba Hills.
PLATE 2 (above): Plain of Las Caobas near Sabaneta....... 6
2 (below): Crystalline outerop Arroyo Savana Larga 6
SHIM NY GEMS ANG. 18a 21 SPD NIONN ae undoes naonine «odeuepedcene daca IO

PUR SEs- 201 eSanto, Womincostossilisivell sia oo 2520

Monte Cris’

EL MORRO

Monte Cristi

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Los Aguas
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BULLETINS OF AMERICAN PALEONTOLOGY, Vol. 5, No. 2

SKETCEeMArP

EW TION |

MAy-JUNE 1916

----- Outward Route
------ Return Route

Scale of Miles

S, Geological Section (See Part IT)

(6) As (8) Cerro Gordo
‘Martin

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4 Rompino AS

(Desiderio Arias with a large ve

band entrenches himself at S
Looting and burning. All Am
cans flee.)

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progress ( 15
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SIN @E DOM lING Gal NG
SECO NS A Ne Fess ils

PART I

MI OIE S@yx

INTRODUCTION

The Expedition to Santo Domingo and the results embodied
in this memoir were carried on under the auspices of the Sarah
Berliner Foundation. This generous gift for the furtherance of
women’s work in science was made by Mr. Emile Berliner of
Washington, in memory of his mother, Mrs. Sarah Berliner, a
woman of strikingly strong and noble personality. A grant from
this fund has made possible the resumption of paleontological
work in Santo Domingo after an interval of more than forty
years.

Additional financial assistance was received through contri-
butions from the Veatch Fund for paleontological research. This
rendered it possible to send an extra assistant and thus to carry
on the field operations with far greater safety and efficiency.

The object of the expedition was to make careful zonal col-
lections of fossils at the various sections visited and to correlate
these sections with one another. With these determinations
made, a much needed light would be thrown on the general se-
quence of Tertiary formations in the Western Hemisphere.

In addition to more than three hundred species of fossil
Mollusca with exact localities, illustrated by photographs and
sections, the collections secured by this Expedition included fossil
Crustacea, Echinoderms, Corals, Bryozoa, Foraminifera, and
plant remains; also several hundred species of recent land and
marine Molluscs fromTurks Island and Santo Domingo; some inter-

2 BULLETIN 29 166

esting living river crabs and other Crustaceans, and various Rep-
tiles, including a new species of snake and some curious lizards.

The fossil Crustacea, Echinoids, Corals, Bryozoa, and Fora-
minifera were sent to Dr. Vaughan to be submitted for identifi-
cation to experts in the different groups. He himself very kindly
undertook the corals, Miss Rathbun the Crustacea, Dr. Jackson
the Echinoids, Messrs. Bassler and Canu the Bryozoa, and Dr.
Cushman the Foraminifera. In return for this kindness the ma-
terial was loaned to the United States Geological Survey for in-
corporation in various forthcoming reports.

Thus it will be seen that the Expedition has contributed
new and interesting material for many lines of research.

Our collection of Molluscs was supplemented by a loan of
unnamed Santo Domingo specimens from the American Museum.
This gave an additional locality for correlation.

Of greatest value in making the identifications was the Gabb
collection of the Paleontological Museum, Cornell University,
which included a large number of metatypes.

The order followed in this memoir is that in which the work
was actually done. The material was collected and very critic-
ally examined and classified. In accordance with this, Part I
will be devoted to Mollusca, Part Il to Stratigraphic Deductions
made from the study of the various classes of organic remains.

The author is grateful to Dr. Dall for his aid in certain per-
plexing identifications; to Dr. Vaughan for his personal interest
in the corals and for the distribution for study of the various
groups of fossils among his colleagues and assistants; to Dr.
Reeds for the loan of the American Museum collection; to Pro-
fessor Berry for identifying the_plants; and to Professor Harris,
who has been a never failing inspiration and mainstay.

For greatly facilitating the progress of the Expedition the
writer is much indebted to the kindness of Mr. Arthur Sewall,
Hon. W. A. Maury, Professor Grabau, and Ambassador W. W.
Russell.

167 DoMINICAN Fossi_s-—-MAuURY 3

SIGE ICR QR! Wri (2 ie Sa DIN

Personnel.—The expedition consisted of the writer, Mr. Karl
Paterson Schmidt of the American Museum, and Mr. Axel Olsson,
Instructor at Cornell University. Mr. Schmidt and Mr., Olsson
had the great advantage of having been trained in geological
field work by Professor Gilbert D. Harris, having spent three
summers in exploring and collecting on rivers of the Southern
States, flowing through Tertiary formations not unlike those
which were to be explored in Santo Domingo.

All the heavy and arduous work of collecting was done by
Mr. Schmidt and Mr. Olsson. This involved wading up rivers,
carrying heavy packs of fossils, sleeping in the roughest shanties,
and undergoing the greatest discomforts, some not unmixed with
danger to health and life, but none causing them to falter in the
slightest degree. Highest praise and sincerest thanks are offered
to Mr. Schmidt and Mr. Olsson for their splendid work in se-
curing the fossils and sections upon which the results of this
work are based.

Route.—The expedition left Monte Cristion May oth, 1916, af-
ter one day’s study on the Morro. It was not possible to pro-
ceed through Guayubin on the main road, as that town was
rebel. So the party crossed the Yaqui River directly south of
Monte Cristi on the ferry and went to Las Aguas (see sketch
map, I), thence to a region called Macabon (2 on sketch map),
which lies in a very flat area. So far the trip had been over the
Yaqui flood plain, consisting of alluvial deposits cut by the
meandering, abandoned channels of tributary streams. Heavy
rain at Macabon caused a delay of twenty-four hours, as the
water lay six to’eight inches deep on the flat plain.

. From Macabon the party proceeded to Las Matas (3-0n
sketch map). The land here becomes rolling and is strewn with
reddish gravels. Riding on to Escalantes (4 on map) Ostrea and

4 BULLETIN 29 168

casts of Pectunculus were found in the roadway near a small
creek. The second night was spent at Escalantes and five hours
ride the next day took the party to Sabaneta. All the way from
Las Matas to Sabaneta is over the reddish gravels.

On approaching Sabaneta (5 on map) one sees the level,
grassy savannahs. These, like those of Venezuela, have never
been cleared and are natural meadows. Near by the grass is
seen to be short and poor, although in the distance the plains
look very green. The savannahs are diversified by little knolls
rising from them, covered with bushes. These knolls have szper-
jicially the appearance of morainal hills. The savannahs are of
different levels, in some cases this difference being approximately
fifty feet. Those of the savannahs which are close to streams
are deeply cut by dry arroyos and are left often standing as
blocks. The summits are grassy, but the slopes covered with
bushes. The town of Sabaneta is built on one of the large sa-
vannahs on the banks of the Rio Yaguajal and its altitude is ap-
proximately 325 feet.

A day and a half were spent studying the bluffs along the
river at Sabaneta, but they were found to be unfossiliferous.

A search was then undertaken to find Rompino, one of Hen-
eken’s localities where more than sixty years ago he had collect-
ed fossils. This proved a difficult and very unsatisfactory quest,
as the present Rompino is a regional name. These regions are
quite common, their limits are indefinite, and their existence of-
ten indicated only by a pulperia (little village store) or a shack.
On crossing the end of the Samba Hills on the road from Guay-
ubin to Sabaneta a fossiliferous cut was observed in the roadside,
the fossils in place being of the Avca ponderosa type, while fur-
ther along the road the large Arca patricia occurred loose, not
zm Situ.

Martin Garcia (6 on the map) is not well placed on Gabb’s
map, as it really lies to the Worth of the Sambas. However, it
is also aregion. Beyond Martin Garcia on the main road just
north of the pulperta forming the center of Martin Garcia, the

169 DOMINICAN FossiILs—MAuRY 5

party crossed a small hill capped with soft limestone and found
there casts of the large Spondylus americanus, which proved a
good index fossil in stratigraphic work. Casts of Arca, Venus
and corals were also found.

Rompina was not yet found and the party was lost and
obliged to stop for the night at Ranchadero (7 on the map)
Here they slept in a gallinero (hen house). The host assigned
this to the guests, first gravely untethering his game rooster and
carrying it to thestore. The party slept in hammocks, but were
much worried about the horses, fearing /advones (bandits) might
steal them in the night. Ranchadero is on the Mao to Guayu-
bin road where it passes the edge of the Rio Yaqui flood plain.
The barometric reading was 170 feet altitude at Ranchedera.

Passing through Cerro Gordo (8 on map), the party met
with rebels and malo gente, who hotly disputed whether it would
not be well to begin the killing of the Americans with these,—
‘‘Bueno para empezar con estos a matar los Americanos!’

The next stop was Cana (9 on map) on Rio Cana on the
Mao-Guayubin road. Above the ford at Cana a fine fossiliferous
bed of Serpulorbis papulosa was found. The party camped
that night ina tent near the Rompino river, a tributary of the
Cana. There were a few houses there and the natives were brist-
ling with knives. The next day an attempt was made to follow
up the Cana river, but the party was misled by the cow-paths,
which are exactly like the trails. But the following day a de-
serted shack was found back of the river. This shack Lalo (the
guide) pronounced to be the true Rompino (Rompino verdadetro)
(10 on map). Finding nothing there, Los Quemados was made
the next objective point.

Since Los Quemados is on the south side, the party had to
cross the Sambas. First a trail was followed, then an old ma-
guina (machine) road, formerly used in hauling gold-washing
machinery across the Sambas to the old mines. This road is
wide, still in fair condition, with wheels and pieces of iron scat-
tered along. It le#up and up to 870 feet altitude on its summit

6 BULLETIN 29 170

where it passes over the crest of the Sambas. As the road lay
in a low pass, the maximum height of the Sambas was estimated
at 1000 feet. This range of hills viewed from the south near
Sabaneta appears as a straight, little-broken ridge, cut into by
the Rio Cana. The hills are capped with rather hard limestone.
They are covered with a heavy growth of timber, — a hard wood
forest, the most striking tree being the a/macigo, with very yel-
low scaly bark.

On beginning the descent down the Sambas, the forest opens
up and discloses a magnificent view of the Las Caobas (mahog-
any) plain, and behind it the frowning Cordillera, always capped
with ranks of cumuli. The mountains also stand in ranks, with
Pico Gallo, 8000 feet high, towering in their midst. The higher
peaks disappear into the clouds which seem a continuation of the
mountains.

The Las Caobas plain is covered with masses of apartzllo
(bunch) grass. This grows as tall as four feet and bears spikes
of reddish flowers which give the entire plain a reddish appear-
ance. The plain is rolling with a general dip towards the Sam-
bas, that is to the north. Among the bunch grassis the /aba-
guela, a scraggly, crooked shrub, used for making canes when
well grown, as it is very tough.

Coming down the road the party branched off into an ar-
royo on the west, where a yellow fossiliferous clay with Pectens
was found at an altitude of 540 feet. There is no village of Las
Caobas, but this region is marked by the pulperta (country
store, indicated on the sketch map as 11). Three or four miles
east of this pulperia of Las Caobas the Sambas break up into
more than one range towards the Rio Gurabo. Even further
west they are given local names, as Cerros de Martin Garcia,
de Cerro Gordo, etc. Not far from Las Caobas the party ob-
served a small amphitheater superficially resembling a cirque, a
couple of hundred feet deep, the slopes wooded except where
cleared for planting bananas, and the bottom well culti-
vated. The whole effect was that of a great arm chair. A

171 DOMINICAN FossILS—MAuRY 7

small arroyo runs from it into the Rio Gurabo. The amphithe-
ater is no doubt a singular form resulting from erosion.

The Gurabo was then forded three times to observe the
striking bluffs of blue clay about 100 feet high, with a charac-
teristic concave curve. ‘These are Gabb’s ‘“‘blue shales’’ really a
hard clay not sufficiently consolidated for shales, nor are they
laminated. They contain wonderfully preserved gastropods and
more fragile pelecypods, among them the large Spondylus. Here
and elsewhere in the Yaqui Valley this proved a very character-
istic fossil.

Three days and a half were spent in this region on the east
bank of the Gurabo collecting. The best accomodations obtain-
able at night were native cots in the combined chicken coop and
store house at the pulperia of Los Quemados (12 on sketch map).

Trips up and down the river on foot were made, going as
far as possible. It was impossible to ride, as there are no trails
for horses.

Above Los Quemados the river cuts through limestone al-
ternating with blue clays. The limestone tumbles in great
blocks into the river and down its banks, and one has to crawl
under or over these great blocks. The Gurabo river here is
twenty-five to thirty-five feet wide. Its bed is of clay with
gravels and bowlders from the Cordillera, the bowlders being of
both metamorphic and igneous rocks. The sides are precipious,
and 80 to 100 feet high. They are usually more sloping where
the limestone formation is present except where it forms a pro-
tective cap. The plain of the river bottom is usually cultivated
and is up to forty rods wide. One of the very characteristic
trees on the banks is the A/ara, which is magnolia-like. Abound-
ing in the trees and bushes of the banks is a green snake, the Cu-
lebra verde ( Uromacer catesbyz), which is peculiar to the island.
This species is used for the Voodoo worship in Haiti.

The party left Los Quemados for Mao, by good fortune vza
Cercado (13 on the map and shown on frontispiece). This is
one of Heneken’s localities and it gave us a splendid yield of fos-

8 BULLETIN 29 172

sils. Six days were spent collecting at Cercado, the party stop-
ping at the house of Senor Jose Fraden, a very intelligent and
kindly man. He said there were many badly disposed people
(mucho malo gente) in the neighborhood and therefore was so good
as to send the young man of the house with the party and with
the guide as a protection.

Three fossiliferous cliffs were found above Cercado and one
or two below. Large collections were made from these bluffs.
This occupied about a week’s time. A trip was also made to the
Rio Amina as far as Hato Viejo on the Amina (14 on the sketch
map); and thence to Potrero (15 on map). At Potrero Ostrea
and Spondylus were found, but badly preserved.

Returning to Cercado the work was interrupted by a ten
foot rise of the Rio Mao. Indeed, even before this rise the cur-
rent had been very swift and the fording deep. Politically also
the situation was becoming daily more dangerous, especially on
approaching nearer to Santiago, where Desiderio Arias, the leader
of the revolution, was entrenched. It was deemed best to take
the fossils secured back to Monte Cristi and so get them safely
out of the interior to the port, then to obtain supplies that were
needed, and try a fresh start for Santiago.

The furthest point reached up the Mao was Hato Viejo (the
one mentioned by Gabb, zo¢ Hato Viejo on the Amina); and on
the summit of the last accessible bluff, which rises some 300 feet
above the river at that point, the aneroid read 650 feet, but we
feel little confidence in this and give it only as approximate.
There is a splendid view from the top of this cliff, looking south-
ward, of the broken foothills of the main range. Gabb men-
tions four terraces here. Our party saw one very striking high
level terrace about 700 feet, and a lower less pronounced terrace
about 640 feet, giving an approximate difference of 50 feet.
There were also other levels at a lower altitude and to the south-
west, but they were ill-defined.

The party returned along the outward trail as far as Las

ante We the
Cae:

Pe:

hes

10)

b
x

IPI, 23, Wolll § BULL. AMER. PAL. No. 20, Pl. 2

Plain of Las Caobas near Sabaneta

Crystalline Outcrop, Arroyo Savana Larga at El Guanal

173 DoMINICAN FossiLs-—-MAuRY 9

Caobas, where they branched off to the southwest for Sabaneta.
On approaching the Cana River a limestone with enormous Tur-
edo tubes was seen. |

On crossing the Rio Cana at Caimito (16 on sketch map) in the
gorge a terrace was observed about fifty feet below the general level
and beneath this terrace the gorge is about fifty feet deep. The
river appears from this to have been rejuvenated and the uplift
to have been recent.

Very beautiful fossils were collected on the Rio Cana. Af-
ter making collections and sections, the party rode on to Saba-
neta and along the Rio Guayubincito to the town of Guayubin-
cito (17 on the map), and then followed aroad more to the west
to Las Lomas (18 on the map). Between Guayubincito and
“Las Lomas large Ostreas were seen resembling those collected at
Escalantes. Proceeding on to Castenuela, several fossiliferous
outcrops were noted along the road, perhaps Pleistocene, — per-
haps equivalents of Gabb’s outcrops on the road to Guayubin.
It was unfortunately impossible to stop to collect because of the
late hour, pouring rain, and the exhausted state of the horses.
So there was no choice but to press on to Monte Cristi.

The party arrived at Monte Cristi none to soon, as the Rev-
olutionary party had begun shooting. All Americans took refuge
on the United States gunboat Panther, and remained on board
four days.

The Dominican residents who did not join the rebels fled to
the beach. The town was deserted, the bush full of rebels, ban-
dits and malo gente. A return to the field from the direction of
Monte Cristi was obviously impossible.

Proceeding on to Puerto Plata we hoped to erika) in from
there to Santiago, as under normal conditions a cog-wheel rail-
road connects these towns. But Desiderio had captured all the
locomotives. Moreover we met at Puerto Plata the American
residents of Santiago as refugees who had left all their posses-
sions and secretly fled under cover of night. Several had hidden
in the bush without food for some days. Conditions in the in-

10 BULLETIN 29 | 174

terior were such that we were most urgently advised to abandon
the attempt to reach Santiago, since Desiderio was entrenched
there, and geologizing in the lonely thickets would certainly re-
sult in our being shot and never heard of again. The sight of
seven dead men on the pier at Macoris convinced us that this
was no idle fancy. So with profound regret we were forced to
abandon the Santiago section and the study of the blue clays of
the Upper Yaqui and the Nivaje, but we trust that we may yet
accomplish this on a future occasion.

175 DOMINICAN Fossirs—MaAury II

VMOLTUSeGx

GrAS> GAS Tk @ ODA
ORDER OPISTHOBRANCHIATA

Suborder Pteropoda

Genus CavoLina Abildgaard
Cavolina, sp. indet.

Shell minute, resembling in some respects the recent C. gzb-
bosa Rang, but not identical with that species. The ventral sur-
face is extremely globular, evenly rounded, not crested as in C.
gtbbosa. The dorsal surface is flat, projects beyond the opening,
curves upwards slightly and is strongly tri-sulcate. The single
shell found is too imperfect for detailed description. Attention
is merely called to the presence of the genus. A species near
C. gtbbosa is also reported by Dr. Dall from the Bowden beds, Ja-
maica.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Suborder Tectibranchiata
Genus Actaon Montfort

Act@on riomaensts, n. sp.
Plate 3, Figure 1

Act@on cubensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
245, 1873. Not the recent shell.

12 BULLETIN 29 176

Acton punctostriatus Dall (in part), Bull. Mus. Comp. Zool. Harv.
Coll., vol. 18, p. 40, 1889: Trans. Wagner Inst. Sci., vol. 3, pt. 1,
p- 14, 1890. Not A. punctostriatus C. B. Adams 1840.

Shell ovate, with four and a half gently convex whorls, su-
ture well defined; outer lip thin, produced anteriorly; inner lip
with a slight callus; columella straight, bearing a single very
strong plication; last whorl ornamented with a series of fine
spirals, appearing under a lens as delicately puncticulate or finely
serrate lines which extend usually over half, but sometimes over
all the volution and are occasionally obsolete; examined under
the compound microscope the sculpture is seen to consist of nar-
row grooves, with cross bars, alternating with wider smooth
bands, the barred grooves producing the punctate effect when
less highly magnified. Length of large specimens 4.5, greatest
width 2.25 mm.

Our species is evidently* that which Gabb also collected and
identified with d’Orbigny’s recent Cuban shell A. punctata (La
Sagra, Hist. Pol. y Nat. Isla de Cuba, Atlas 8, pl. 17, figs. 1o-
12). Since that name had been preoccupied by Lea, Gabb re-
named Orbigny’s shell A. cubenszs (Trans. Amer. Phil. Soc., vol.
I5, p- 245, 1873). But the Dominican species is not identical
with the recent Cuban shell, which is only about half the size of
the Dominican fosssil,— measuring about 2.25 to 2.50 mm. and
having five whorls, while the fossil shells of that size are imma-
ture, with only three volutions. Moreover the plication of
the fossil is much stronger and the magnified sculpture of d’Or-
bigny’s shell as figured is quite unlike that of our shell.

Gabb’s name 4. cubensis should stand only for the recent
form called by d’Orbigny A. punctatus.

*Gabb’s specimens of this 4c/g@on and all of his Dominican types have
been for two-score years in the possession of the Philadelphia Academy.
For years they have been undergoing a gradual revision. Until such time
as this is completed they are not available for comparative study. Fortu-
nately we have generally had access to Gabb’s metatypes.

177 DOMINICAN FossILS—MaAuRy 12

Our specimens when compared with figures of Adams’ 4.
punctostriatus (first found in New Bedford harbor) appear quite
different. The Dominican shells are slenderer and much larger,
an individual measuring .10 X .075 inches (which are the measure-
ments given for 4. punctostriatus) is immature and with three in-
stead of four or five whorls. The form of the spire is also unlike
and the body whorl of the Dominican shell is much less inflated.

Locality — (Exp’d’16) Bluff 3, Cercado de Mao (abundant).

Genus AC’TEOCINA Gray
Acteocina canaliculata Say

Plate 3, Figure 2

Volvaria canaliculata Say, Jour. Acad. Nat. Sci. Phila., vol. 5, p. 211.
Bullina canaliculata Say, Amer. Conch.. pl. 39, 1830.
Tornatina canaliculata Guppy, Geol. Mag., p. 437, 1874.
Tornatina canaliculata Dall, Bull.37 U. S. Nat. Mus., p. 84, pl. 52, fig.
27, 1889; Trans. Wagner Inst: Sci., vol. 3, pt. 1, p.15, 1890; Jd.
pt. 6, p. 1583, 1903.

Not Jornatina canaliculata d’Orbigny, De la Sagra, Hist. Pol. y Nat.
Isla de Cuba, p. 133, pl. 4 d2s, figs. 21-24 (—=T. ballata Kiener).

Shell minute, cylindrical, marked by faint, arcuate, longitu-
dinal growth-lines; spire channeled, somewhat elevated, apex
projecting as a fine point; whorls about five; outer lip arcuate,
inner lip with a thin calcareous plate, and a single plication near
the base. Length 3, greatest width 1.5 mm.

This widely distributed and variable species is now living
from Cape Cod to the Florida Keys and in the Gulf of Mexico.
Dall reports it from the Pliocene of Florida, Post-Pliocene of
South Carolina and Florida, and a varietal form from Bowden,
Jamaica. Guppy listed the species in 1874 from the Pliocene of
Trinidad. It has not heretofore been found in the blue clays of
Santo Domingo, but our shell agrees well with Say’s figure of
the type which was collected on the coast of South Carolina.

Localities. — (Exp’d ’16) Bluff 3, Cercado de Mao (rare);
Zone H, Rio Cana near Caimito.

14 BULLETIN 29 178

Acteocina recta d’ Orbigny
Plate 3, Figure 3
Bulla recta d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de Cuba, vol.
5, p-. 67, no. 55, 1845; Atlas 8, pl. 4 dzs, figs. 17-20, 1855.
Tornatina recta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873.
Tornatina coix-lacryma Guppy (in part), Quart. Jour. Geol. Soc. Lon-
don, vol. 22, p. 518, 1876. Not 7. cotx-lacryma Guppy, Geol.
Mag., vol. 4, p. 500, fig. 3, 1867.
Tornatina recta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 15,
1890, /d. pt. 6, p. 1583, 1903.
Cf. Zornatina coix:lacryma Cossmann (in part), Journ. de Conchyli-
ologie, vol. 61, p. 4, pl. 1, figs. 12, 13, 1913.

Shell minute, oblong, cylindrical, chiefly smooth, a few spe-
cimens very finely, obsoletely, microscopically, spirally sub-stri-
ate; spire very short, the first whorl projecting as a knob; su-
ture canaliculate, aperture linear, widening suddenly; columella
smooth. Length of shell 2.5, greatest width 1.25 mm.

This species differs markedly from A. cotx-lacryma Guppy
in the form of the spire. In A. cotx-lacryma the spire is sunken
and only the knob-like point is visible above the plane of the
last whorl; while in A. recta the spire though short is not sunken
and the coils of the volutions can be seen below the apical knob.

We have a number of Gabb’s specimens (C. U. Museum
No. 7637) for comparison.

M. Cossmann has referred a specimen from Martinique to 4.
coix-lacryma, in the synonymy of which he places A. recta. The
Martinique shell is nearly three times as large as Gabb’s, d’Or-
bigny’s, or ours.

Gabb and Guppy identified 4. vecta from Santo Domingo,
and Dall from the Bowden beds, Jamaica.

Locality. —(Exp’d’16) Bluff 3, Cercado de Mao.

Acteocina (Cylichnella) triticum-tritonts, n. sp.
Plate 3, Figure 4

Cylichnella bidentata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,
Pp. 273, 1873.

179 DoMINICAN FossILts—MaAury 15

Cylichna bidentata Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
518, 1876.

Cylichnella bidentata Dall (in part), Bull. Mus. Comp. Zool. Harvard
Coll., vol. 18, p. 46, 1889.

Tornatina ( Cylichnella) ovum-lacertt Dall (in part), Proc. U. S. Nat.
Mus., vol. 18, no. 1035, 1895.

Not Bulla bidentata d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de
Cuba, p. 125, Atlas, pl. 4, figs. 13-16, 1845. Not Cylichna biden-

tata Adams, 1850.

Not Cylichnella bidentata Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24,
Pp. 273, pl. 10, fig. 2, 1872. (Recent Cuban shell, figured after
d’Orbigny’s. )

We collected several hundred shells of a Cylichnella, in the
blue clays of Santo Domingo, of which the larger measure 3 mm. in
length and 1.25 to 1.50 mm. in greatest width. The majority ~
of the shells are slightly smaller than 3mm. All are grooved
with incised spiral lines only at the base.

Thus in size and sculpture our fossils resemble d’Orbigny’s
recent shell, C. dzdentaza living from Hatteras to Santo Domingo.
But the anterior plication in the recent shell is represented in
both d’Orbigny’s and Gabb’s figures as very prominent. In our
fossil shells it is so inconspicuous as to be scarcely observable.
The posterior fold on the contrary in the fossils is very strongly
developed. This appears to be just the reverse of the conditions
in C. btdentata.

In the columellar characters our fossils are more like Guppy’s
C. ovum-lacerti, which has a single strong tortuous columellar
fold. But our species is much smaller than Guppy’s Trinidad
shell and is striate only at the base instead of over the entire
surface. Guppy himself pronounced Heneken’s Santo Domingo
specimens an allied but smaller species.

Gabb also collected specimens of our species in Santo Do-
mingo, as we have some he sent to Cornell (C. U. Museum No.
7638), but among them is one single larger shell measuring 4 x 2
mm. This may be that which Dr. Dall unites with Guppy’s
ovum-lacertt. None of ours attain that size.

16 BULLETIN 209 180

Localities. —(Exp’d ’16) Bluff 3 (very abundant), Bluff 2
(one only), Cercado de Mao; Zone H (one only), Rio Cana at
Caimito.

Acteocina (Cylichnella) ovum-lacerti Guppy
Cylichna ovum-lacerti Guppy, Geol. Mag. London, vol. £1, p. 407, pl,
18, fig. 22, 1874.
Cylichnella bidentata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,
De ZIG, Wa.
Tornatina (Cylichnella) ovum-lacerti Dall (in part), Proc. U. S, Nat.
Mus., vol. 18, no. 1035, p. 27, 1895.

As noted under the preceding species, among hundreds of
Cylichnellas we have none over 3 mm. in length; but one of
Gabb’s Dominican shells sent to Cornell (Museum No. 7638) as C.
bidentata is 4 mm. in length by 2 in width. The shell is worn
so one cannot tell whether the entire surface was striate, but its
size alone discriminates this shell from all the rest. Apparently
it is referable to Guppy’s species.

As with all of Gabb’s Dominican specimens, no locality is
given; but Dr. Dall has identified as C. ovum-lacerti specimens
No. 113746 in the U. S. National Museum from Potrero, Rio
Amina. The type locality was Trinidad.

Genus Vo_vuLta A. Adams
Volvula cylindrica Gabb
Plate 3, Figure 5

Volvula cylindrica Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 246, 1873.
Volvula cylindrica Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.

518, 1876.

Volvula oxytata Bush, Trans. Conn. Acad., vol. 6, p. 468, pl. 45, fig.
12, 1885.

Volvula oxytata Dall, Bull. 37, U. S. Nat. Mus., p. 86, pl. 41, fig. 12,
1889. }

Volvula cylindrica Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 16,
1890; /d. pt. 6, p. 1583, 1903.
Cf. Bulla (Volvula) cf. oxytata Toula, Jahrb. K—K. Geol. Reichs-
anst., Wien, vol. 58, p. 709, pl. 28, fig. 4, 1908.

181 DoMINICAN Fosstrs-—MAURY 17

Shell minute, sub-cylindrical, anterior end rounded, marked
by a few faint, fine striae, posterior end sharply and conspicuous-
ly pointed; aperture linear, widening anteriorly, inner lip slightly
thickened at the base and reflexed. Length of shell 4 mm.,
greatest width 1.5 mm.

Dr. Dall notes that this species is identical with Miss Bush’s
recent species Volvula oxytata, now living from Hatteras to Cape |
Fear and reported doubtfully from the West Indies. To a less
degree it resembles the Cuban recent shell, Volvula acuta d’Or-
bigny, which is broader and less cylindrical in form.

V. cylindrica was found by Dall in the Bowden beds, Ja-
maica. The type locality is Santo Domingo. Guppy also iden-
tified it in Heneken’s collection from the Yaqui Valley.

Localities. — (Exp’d ’16) Bluff 2, Cercado de Mao (very
rare); Bluff 3, Cercado (very abundant); Zone I, Rio Cana
(scarce).

Genus RETuSA Brown
Retusa yaquensts, n. sp.
Plate 3, Figure 6

Shell small, sub-cylindrical, broadening slightly anteriorly,
not constricted near the middle; minutely perforate; spire sunken,
umbilicate; outer lip elevated posteriorly above the spire, its
margin forming a U-shaped upward curve, then it becomes a
trifle inflected along the center, and slightly produced anteriorly;
inner lip thickened anteriorly and reflected over the umbilical re-
gion; pillar with a single plication; anterior end of the shell
sculptured by about half a dozen faint, wavy, unequal spiral
lines; posterior end similarly sculptured with about twice as
many spirals extending a varying distance up towards the center
of the whorl. Length of shell 3.50, greatest width 1.50.

This appears to be the first Refwsa found in the blue clays
of Santo Domingo., It is rather scarce.

Localities. — (Exp’d ’16) Bluff 3, Cercado de Mao (one speci-
men); Zone H, Rio Cana (six specimens).

18 BULLETIN 29 182

Genus Atys Montfort

Atys doliolum, n. sp.
Plate 3, Figure 7

Shell minutely cask-shaped, centrally inflated, narrowing to-
wards either end; aperture as long as the shell, extending behind
the inner lip and descending with a twist upon the apical region
of the concealed spire; outer lip rising abruptly above the peri-
phery, its outer margin forming an angle of about 65°, then
continuing in a gentle curve to the base, where it is slightly ex-
panded and sub-truncated; inner lip with a callus, thickest an-
teriorly; pillar straight, smooth; posterior periphery of body
whorl bordered with a callus band continuous with the callosity
of the inner lip and with the angulated margin of the outer lip;
body whorl smooth medially, sculptured anteriorly and poster-
ly with fine, incised spiral lines. Length of shell 2.75, greatest
width 1.25 mm.

This pretty and rare little shell is strikingly like the Chipo-
lan Oligocene species Atys edemata Dall (Proc. U. S. Nat. Mus.
Not Togs volmeaie 2s. 1Soshabrans) Wace. mimsthvolaie a ot anor
pl. 59, fig. 24, 1903). But the specimens described of that spe-
cies were nearly twice as large as our Dominican shells, and even
so were immature. The heavy callus bands would indicate that
our little shells have attained their full growth, though so minute.
Apparently this is the first Atys ever found in the Santo Domin-
go blue clays.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao (rare).

Genus BULLARIA Rafinesque
(Bulla Linné)
Bullaria paupercula Sowerby
Plate 3, Figure 8

Bulla paupercula Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.

52, 1849.
Bulla paupercula Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873.

183 DOMINICAN FossiLs—MAuRY 19

Bulla paupercula Guppy, Geol. Mag. London, p. 437, 1874; Quart.
Jour. Geol. Soc., vol. 32, p. 518, 1876.

Bulla paupercula Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 18,
1890.

Bulla ey, Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1583, 1903.

Shell ovate-oblong, smooth except for a few spiral impressed’
lines near the base; inner lip with a band of callus extending
the entire length, but thickest anteriorly. Length of a good-sized
shell 21, greatest width 12 mm.

As Guppy and Gabb have noted, this species is very close
to the recent Bulla amygdala Dillwyn, and Dr. Dall thinks it
identical with Bulla striata Bruguiere, the Mediterranean ana-
logue of B. amygdala. Our party collected quantities of BZ.
amygdala from the Monte Cristi beach and the shells resemble
greatly our fossils from the blue clays, but the recent tend to be
nearly twice as large. As long as Sowerby’s species has been so
much used it seems best to retain it for the fossil; but evidently
the species has simply lived on apparently uninterruptedly and
become the recent somewhat larger shell known as &. amygdala.

Bulla paupercula is very common in Santo Domingo, where
it was collected by Heneken and Gabb, and Dall lists it as Bulla
striata from the Bowden beds, Jamaica.

Localities. — Bluff 3, Cercado de Mao; Zone G, Rio Gurabo;
Zones H and I, Rio Cana; sandy clays and gravels, Rio Cana.
(Very abundant on the upper Cana. )

Bullaria Sarahberlinere n. sp.

Plate 3, Figure 9

_ Shell large, ovate-cylindrical, spire deeply involute, sunken,
outer lip slightly raised above the spire, rounded anteriorly; in-
ner lip reflexed and thickened anteriorly and with a thinner,
posterior callus; the surface of the shell in well-preserved speci
mens is very beautifully marked with a series of very delicate
lighter and darker alternating bands, parallel to one another and

20 BULLETIN 29 184

to the margin of the outer lip. These bands narrow and con-
verge towards the spire and increase to a width of about 2 mm.
at the middle of the shell. Due to an interesting optical qual-
ity, these bands when viewed in reversed lights are interchanged,
the light and dark zones changing place, like certain signs ar-
ranged on a series of slats which read differently from diverse
points of view. Length of shell 45, greatest width 32 mm.

We found, as it were a nest, of about fifteen of these beau-
tiful great Bullarias in a single spot up the Cana and nowhere
else. In size and general form this species resembles specimens
in the Newcomb collection of the large B. ampulla Linné from
the East Indies.

This magnificent species of the genus Azllaria is affection-
ately and gratefully dedicated as a tribute to the memory of
Mrs. Sarah Berliner.

Locality. — (Exp’d ’16) Zone I, Rio Cana, near Caimito.

Bullaria granosa Sowerby

Plate 3, Figure 10

Bulla granosa Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 51,
pl. 10, fig. 10, 1849.

Bulla granosa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873.

Bulla granosa Guppy, Geol. Mag. London, p. 437, 1874; Quart. Jour.,
vol. 32, p. 518, 1876.

Shell ovate-globular, thin, spire inrolled, body whorl ven-
tricose, handsomely sculptured with fine impressed spiral lines
crossed by longitudinal arcuate growth-lines; inner lip with a
rather wide band of callus, thickest anteriorly, where it is defined
by a narrow groove. Length of shell 22, greatest width 17 mm.

This fine shell does not appear to have been found except in
Santo Domingo.

Sowerby quotes its resemblance to Bulla hydatis in form,
but that species is very much more globose.

Locality. —(Exp’d ’16) Zone I, Rio Cana.

185 DOMINICAN FossILS—MAuRY 21

Genus RrncicuLA Deshayes
Ringicula dominicana, n. sp.
Plate 3, figure I1
Ringicula semistriata 2? Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 225,
1873. Not #. semistriata d’Orbigny.

Cf. Ringicula tridentata Guppy, Quart. Jour. Geol. Soc. London. vol.
32, p. 518, 1876. Not &. tridentata Guppy, 1874.

Shell exceedingly minute, broadly conic, with four to four
and a half whorls, the apical obtuse and flattened; body whorl
sculptured anteriorly by well-defined, microscopic, incised spiral
lines, extending a varying distance over the whorl, but not
further than the posterior limit of the aperture; inner lip with a
callus and a single strong, lamellar plication on the body, colum-
ella with two strong, parallel, proximate, oblique, lamellar plica-
tions; outer lip thickened and having a single median tooth.
The largest specimens are 1.5 mm. in length, greatest width .75
to 80 mm., but the large majority of the shells are only about 1
mm. long.

This species bears considerable resemblance to Guppy’s un-
figured FR. tridentata from Bowden, Jamaica, but both Guppy
and Dall describe that species as entirely smooth. Cuppy re-
ferred Heneken’s Dominican specimens to #. ¢rzdentaia, but pos-
sibly they were smooth and did not show the characteristic basal
striz.

Gabb evidently had the same species as ours and referred it
with a question to #. semistriata, a recent Jamaican shell de-
scribed by d’Orbigny. Gabb remarked that his specimens seemed
more elevated. Our shells appear not so inflated, the outer lip
not so heavily thickened, the aperture wider, and the apex more
blunt than d’Orbigny’s figures indicate. Moreover most of ours
are only half the size of the latter species. Apparently the Do-
minican species is distinct, but very closely allied to 2. semiséirt-
ata.

The Gatun analogous species, XR. hypograpta Brown and

22 BULLETIN 29 186

Pilsbry, is also sculptured over the anterior half of the body
whorl, but the spirals are closer and the spire appears shorter
and the body broader than in our shell.

Locality. — Bluff 3, Cercado de Mao. (Abundant).

ORDER CTENOBRANCHIATA
(A.) SUPER-FAMIL VY TOXOGLOSSA
Genus TEREBRA Adanson

Terebra sulcifera Sowerby
Plate 3, Figure 12
Terebra sulcifera Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
47, 1849.
Terebra robusta Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
224, 1873. Not 7, robusta Hinds, Proc. Zool. Soc., p. 149, 1843.
Terebra sulcifera Guppy (in part), Quart. Jour. Geol. Soc., vol. 32, p.
525, pl. 29, fig. 8. 1876.

Heneken collected three Terebras in Santo Domingo, which
Sowerby named sulcifera, inequalis and bipartita, from their
striking characteristic sculpture.

When Guppy, in 1876, examined the types he found he
could establish no constant differences between them aud placed
the last two species in the synonymy of the first. The extreme
forms are, however, very different in aspect.

T. sulcifera has the early whorls deeply sculptured, but with
age the sculpture is lost and the whorls increase rapidly in diam-
eter. Both these characteristics are more remarkably developed
in the related species, 7. Gabdz Dall.

The ornamentation of the earlier whorls of 7. salctfera con-
sists of two thickened, sub-sutural bands, the second (anterior)
being about half the width of the first, and both bands being
crossed obliquely by very fine riblets. The two bands occupy
about two-thirds of the whorl. The remaining third appears
sunken and is crossed by very fine vertical riblets. After ten or
more volutions this sculpture becomes progressively weaker, the

187 DOMINICAN FossILs—MAuRy 28

two thickened bands first losing their riblets. The three sets of
riblets are at first discontinuous, but later become continuous.
A fragment including nine whorls measures 65 by 15 mm.

Specimens of 7. sulcifera from Bailey’s Ferry, Florida,
have the early whorls exactly like those of the Dominican shells,
but the second band in the later whorls tends to be slightly
narrower.

The species is also reported by Guppy and Dall from the
Bowden beds, Jamaica. Our specimens were collected by Gabb
in Santo Domingo.

Terebra Gabbi Dall

Terebra Gabbi Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, p. 34,

1895.
Terebra Gabot Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig.

31, 1903.

This singular species, which appears like an abnormality, is
characterized by very rapid increase in diameter, and complete
loss of sculpture on attaining old age. Dr. Dall’s type in a length
of 70 mm. widened from 2.75 to 24mm. Itis a culmination of
the tendency begun in 7. sulcifera.

Type locality. — Potrero, Rio Amina (Bland).

Terebra bipartita Sowerby
Plate 3, Figure 14

Terebra bipartita Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
47, 1849. Not 7. dbipartita Deshayes, 1859.

Terebra bipartita Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873.

Terebra (Acus) bipartita Dall, Proc. U. S. Nat. Museum, vol. 18, no.
1035, P- 38, 1895.

Whorls girdled by a single incised line cutting them into
nearly equal halves; ornamentation of undulating longitudinal
riblets rendered discontinuous by the girdling line. Length of
a fragmentary shell 50, greatest diameter 12 mm.

24 BULLETIN 29 188

According to Sowerby the columella of 7. dzpartita is
smooth, and Dall also says the pillar of this form seems to be
simple and smooth. But our specimen which was sent by Pro-
fessor Gabb to Cornell (Museum No. 7665) is broken away con
siderably at the aperture and this reveals very definitely two
sharp plications on the columella; —but far within, at least a
quarter of a revolution, so that they could not been seen were
the shell unbroken. The fact that the columella is biplicate in
T. btpartita adds strong evidence to the relationship established
by Dr. Dall of the three forms 7: spzvzfera, T. oligomitra and T.
cirrus with T. biparizta. It seems much more probable that
these three, which all have biplicate columellas, are of the d7pa7-
tita group if b¢partita itself has two columellar plications.

Apparently either Sowerby's specimens were perfect and the
folds were completely hidden, or else what seems very probable,
his descriptions of the characters of the columella of 7. dzpartita
and his preceding species, 7: zxeqgualis, became transposed by
some mistake, — for he says* of zxegualis, ‘columella antice bi-
plicata’’ and of dzpartita, ‘‘columella antice laevi’’. As a matter
of fact, as shown by the figure, our dzpartzta columella is bzplicate
like all those of the dzsartzta group. Our zmeqgualis series shows
that the columella may appear smooth when the shell is com-
plete, but it invariably has within ove sharp plication.

The type locality for 7: d¢partita is Santo Domingo; but it
has also been found in the Chipola marls, Calhoun County,
Florida.

Terebra spirifera Dall
Plate 3, Figures 15, 16

Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
225, 1873. Not dislocata Say.

Terebra (Acus) bipartita (Sowerby) variety spirifera Dall, Proc. U.
S. Nat. Museum vol. 18, no. 1035, p. 38, 1895.

*Quart. Jour. Geol. Soc., vol. 6, p, 47, 1849,

189 DoMINICAN FossiLs-—-MAURY 25

Terebra (Oxymeris) btipartita (Sowerby) variety spirifera Dall,
Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 13, 1903.

Shell of medium size, whorls twelve to fourteen, tapering
rapidly to an acute spire; spiral ornamentation slightly more pro-
nounced than the transverse. The former consists of typically
four (sometimes reduced to three) narrow, flattened bands en-
circling each whorl of the spire below the sutural zone. The
transverse sculpture consists of many close-set riblets which cross
the sutural zones sharply and almost perpendicularly, then swing
back a trifle in the narrow subzonal channel, but resume a per-
pendicular direction on passing under the four spirals which are
wound over the riblets. The columella bears two sharp folds.
. Specimens range from 25 to 35mm. The type measured 30X8
mm.

In grouping the Dominican Terebras the presence or absence
of columellar plications is of much assistance. Thus all the spe-
cimens of spirifera, oligomitra, and cirrus show the two folds on
the columella, a character which throws them into the 7. dzpar-
tita group, and differentiates them readily from Toula’s Isthmian
types.

Localities. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao;
Zone I, Rio Cana near Caimito.

Terebra cirrus Dall
Plate 3, Figure 17
Terebra (Acus) bipartita Sowerby variety cirrus Dall, Proc. U. S&S.
Nat. Museum, vol. 18, no. 1035, p. 38, 1895.
Tecebra (Oxymeris) bipartita Sowerby variety czrrus Dall, Trans.
Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 28, 1903.

This shell bears a general resemblance to 7. spzrzfera Dall,
but can be distinguished from the latter species from the fact
that in this shell the spirals are more numerous (five or more to
a whorl instead of four), less raised, more irregular, and have a
more crowded aspect. The transverse riblets are low, narrow,
with wider interspaces. Columella with two sharp folds. Length

26 BULLETIN 29 I90

of type 25, greatest diameter 5.5 mm. Our specimens run from
21 to 32 mm. in length and 5 to 7 in greatest diameter.

The biplicate columella at once places the species in the 7.
bipartita group and separates it from the Isthmian 7. gatunen-
sts, which it resembles somewhat in ornamentation.

The type of 7. civrus is from the Rio Amina.

Localities. — (Exp’d ’16) Zone G, Rio Gurabo, at Los Que-
mados; Zone I, Rio Cana, at Caimito; and Bluff 3, Cercado de
Mao.

Terebra oligomitra Dall
Plate 3, Figure 18

Terebra (Acus) bipartita Sowerby variety oligomitra Dall, Proc. U.
S. Nat. Museum, vol. 18, No. 1035, p. 38, 1895.

Terebra (Oxymeris) bipartita Sowerby variety oligomitra Dall, Trans.
Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 29, 1903.

This species resembles 7: spzrvzfera Dall, but the ornamen-
tation is bolder and more striking. Asin that species there are
four spiral bands between the sutural zones, but the spirals in
this shell are of less nearly equal in width and less strongly de-
fined. In sfzrifera the spirals are somewhat stronger than the
transverse riblets, but in o/igomitra the opposite is true, the rib-
lets being very sharp, thin, and well-defined. The three poster-
ior spirals of the four lying between the sutures are narrower
than the anterior one and tend to group themselves together.
Subzonal channels striking. Columella rather long, twisted,
bearing two sharp folds. Length of decollate shell (of nine
whorls) 36 mm., diameter 8. The type, also decollate, measured
38 by 8.5 mm.

This species attained a somewhat larger size than its nearest
ally, 7. spivifera. Its biplicate columella places it at once in the
T. bipartita group.

The type locality is the Rio Amina.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

I9I DOMINICAN FossILsS—MAuRY 27

Terebra gausapata variety levifasciola, n. var.
Plate 3, Figure 19

Shell small, very slender and elongate, resembling 7. gawsa-
pata Brown and Pilsbry from Gatun (Proc. Acad. Nat. Sci.
Phila., pp. 340-341, pl. 22, figs. 8, 9, 1911) and is probably a va-
ciety of that species. The specimens of 7: gausapata were frag-
mentary, but they show the strikingly deep sulcus beneath the
subsutural fasciole which is very marked in the Dominican shell.
In gausapata, however, this fasciole is ornamented with three
spirals, while in our shell it is smooth. This has suggested the
varietal name. Our shell has sixteen whorls, separated by a
wavy suture; each whorl is sculptured by about fifteen longitudi-
nal riblets which are very strongly developed on the subsutural
band, but on crossing the deep sulcus are low and diminished to
half their thickness, they then continue over the remainder of the
whorl ina slightly oblique direction. The anterior portion of
each whorl is ornamented by about seven spiral threads which
do not cross the riblets; columella with two sharp folds. Length
of shell 18, greatest diameter 3.5 mm. Rare.

The biplicate columella and the deep sulcus beneath the sub-
sutural band show the close relationship of this shell to the 7.
bipartita group.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Terebra Cambiarsoz, n. sp.
Plate 3, Figure 20

Shell small, acute, whorls about eleven, all except the nu-
clear being ornamented with narrow, longitudinal riblets; sub-
sutural band distinct, marked off by a narrow, deep sulcus, the
portion of the whorl anterior to this sulcus sculptured with two
sharply incised spiral lines which do not cross over the longitu-
dinal riblets. Columella with two distinct plications. Length of
shell 14, greatest width 4mm. Rare.

In its size and in the scarcity of spiral lines sculpturing the

28 BULLETIN 29 192

whorls this shell recalls 7. amztra Dall from Potrero, Rio Am-
ina; but it can be instantly differentiated from that shell by the
absence in amztra of any definite sub-sutural band and sulcus.

Indeed 7. Cambiarsoz is quite distinct from any of the many
Terebras in the Cornell Museum; but its sharply biplicate col-
umella and deep sulcus beneath the sub-sutural fasciole place it
in the 7. dtpartita group of which so many of the Santo Domin-
go Terebras are representatives.

This species is named in honor of Senor Rodolfo D. Cambi-
arso, of Santo Domingo City, a most ardent student of the nat-
ural history and archeology of his native island.

Locality. —(Exp’d’16). A single specimen was found in
Bluff 3, Cercado de Mao.

Terebra amitra Dall
Plate 3, Figure 21

Terebra (Oxymeris) amitra Dall, Proc. U. S. Nat. Mus., vol. 18, no.
1035, Pp. 39, 1895; Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59,
fig. 19, 1903.

We unfortunately did not collect any specimens of this rare
little Terebra, of which there is a single shell in the National
Museum. It measures 9.5 mm. in length and was collected at
Potrero, Rio Amina.

Terebra protexta Conrad
Plate 4, Figure 1

Cerithium protextum Conrad, Proc. Acad. Nat. Sci. Phila., vol. 3, p.
26, 1845.

Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
225, 1873. Not dislocata Say. Exclude synonymy.

Acus protextus Dall, Rep. Blake Gastr., Bull. Mus. Comp. Zoology
Harvard Coll., vol. 18. pp. 63, 65, 1889.

Terebra (Acus) protexta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1,
Pp. 25, 1890.

Shell small, slender, elongate, whorls sculptured with about

193 DOMINICAN FossiILs—MAuRY 20

eighteen very fine longitudinal riblets, well developed on the sub-
sutural fasciole and continuing over the remainder of the whorl
beneath the slight sulcus marking off the fasciole; spiral sculp-
ture of four narrow, flat bands on each whorl between the fasciole
and the suture of the following volution, and a spiral thread
usually lies next to the suture, anterior to the bands. Length of
fragmentary shell with eleven whorls, 12 mm., greatest diameter
4mm.

Among some specimens labelled 7. dislocata Say by Gabb,
collected by him in Santo Domingo (C. U. Museum No. 7666)
is a single shell exactly like a specimen of 7. protexta Conrad in
the Newcomb collection, dredged in Sarasota Bay. The latter
is a typical example of Conrad’s species and its sculpture matches
perfectly that of the fossil shell. The fossil is much more like
the recent specimens of protexta than like the Miocene represen-
tatives of that species.

T. protexta is now living from Hatteras to Texas in 2-50
fathoms. It has apparently not been found in the recent Antil-
lean molluscan fauna, but is present in the Miocene of the Caro-
linas, Pliocene of South Carolina and Florida, and Post-Pliocene
of North Carolina, and Florida. Unfortunately, like all Gabb’s
specimens, our Dominican shell has no locality label further than
Santo Domingo.

Terebra inequalis Sowerby
Plate 4, Figure 2

Terebra inegalis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.

47, 1849.
Terebra inequalis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 290, 1866.
Terebra inequalis Gabb, Trans. Amer. Phil. Soc., vol. 14, p. 224, 1873.

Shell slender, tapering to an acute spire, earlier whorls
with a sub-sutural raised band foliowed by a second band
about half the width of the first, from which it is separated by an
impressed line. The two bands occupy slightly more than half

30 : BULLETIN 29 194

the whorl. In the later whorls of large specimens the second
band becomes more or less obsolete and the sulcus then appears
to divide the whorl into unequal parts, which was the origin of
the specific name. The entire shell is sculptured by very fine
transverse riblets which are oblique posteriorly and become ar-
cuate anteriorly on traversing each whorl. Young shells show
fine spiral strize which are later obsolete.

As noted under 7: dipartita, Sowerby by some error de-
scribes the columella of zz@gualis as biplicate and that of dzpar-
tita as smooth. ‘These remarks were apparently transposed since
bipartita is biplicate, and inequalis appears smooth when the shell
is perfect, but when the outer lip is broken away one distinct
terminal plication is revealed. Columella short, with a slender,
external keel. Length of medium sized shell of which the early
whorls are lost 60 mm., greatest diameter 12, number of whorls
included 17.

This species is closely related to 7. sulcifera, which it re-
sembles in the style of sculpture, but it differs in retaining its
slender form throughout life and its sculpture does not become
obsolete.

Guppy reported 7. zxequalis from Cumana (Venezuela), and
small specimens from Jamaica. Dall also cites it from the Bow-
den beds, Jamaica.

Localities. — (Exp’d ’16) Zones E and D, Rio Gurabo at
Los Quemados.

Terebra hattensts Dall
Plate 4, Figure 3

Terebra hattensis Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, p. 35,

1895.
Terebra (Hastula) haitensts Dall, Trans, Wagner Inst. Sci., vol. 3, pt.

6, pl. 50, fig. 31, 1903.
This species very closely resembles 7. znegualis, from which
it may be differentiated by its bolder and less regular sculpture.
Our figure shows the single, strong plication on the columella

195 DoMINICAN FossiIts—MAuRY 31

which places it in the 7: zxegualis group. An incomplete speci-
men measures 50X10, and includes eleven whorls. Dr. Dall’s
type measures 6211.5 mm. The type locality is Potrero, Rio
Amina.

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao.

Terebra Petitz, n. sp.
Plate 4, Figure 4

Shell rivaling in size the recent Oriental 7. flammea Linné.
Our single specimen is decollate but seventeen whorls remain.
The earlier of these show much the same sculpture as 7. inequalis
of which I at first thought this might be a large variety. Length
of incomplete shell 113, greatest diameter 19 mm.

Clearly this splendid Terebra is of the 7. zaegualis stock.
Its living ally and probable descendant is a rare shell, 7. texana
Dall, found on Matagorda Island, Texas, (Proc. U. S. Nat. Mus.
No. 1264, p. 502, pl. 29, fig. 8, 1902). But the two sub-sutural
bands in the recent shell occupy two-thirds of the whorl instead
of about half as in the fossil, and the longitudinal riblets are less
continuous and less arcuate than in the fossil. Dr. Dall says 7.
texana is the only true Terebra sensu stricto living on our coasts.
Apparently the western migrants have lived on in the Gulf of
Mexico but the ancestral members have become extinct in the
Antilles.

I take great pleasure in dedicating this fine Terebra to Mr.
Isaac Petit, American Consul at Monte Cristi, as a mark of ap-
preciation of his kindness to our party, his efficient aid, and his
sincere interest in the welfare and success of our Expedition.

Locality. — (Exp’d ’16) Zone A, Rio Gurabo, at Los Que-
mados.

Terebra gatunensis Toula
Plate 4, Figure 5

Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
225, 1873. Not T. dislocata Say.

32 BULLETIN 29 196

Lerebra (Oxymeris) gatunensis Toula, Jahrbuch der K—K. Geol.
Reichsanstalt Wien, vol. 58, p. 705, pl. 25, fig. 14, 1908.

Terebra gatunensis Brown and Pilsbry. Proc. Acad. Sci. Phila., pp.
339, 340, pl. 22, fig. 2, rgrt.

Terebra (Myurella) gatunensts Cossmann, Jour. de Conchyliologie,
vol. 61, pp. 13, 14, pl. 1, figs. 26-29, 1913.

Shell slender, tapering to a very acute spire, whorls of a
decollate specimen 13, each whorl ornamented with a subsutural —
band about a quarter the width of the whorl. The band is
marked off by a sulcus beneath which are typically seven, more
often six, spiral cords. (The seventh frequently being concealed
by the following volution). Transverse sculpture of many, very
fine riblets which traverse the subsutural bands in a nearly ver-
tical direction, but swing back slightly at the furrow, then be-
come somewhat arcuate on crossing the seven spirals. Toula
mentions twelve riblets on half a volution. This is the case
with a diameter of 8.5 mm., that of Toula’s specimen, which was

a young shell; but the number of riblets increases on the later,
larger whorls. Columella hardly plicate, but sharply keeled at
the back.

Length of decollate shell 50 mm., greatest diameter 10.5
mm.

This species can easily be distinguised from 7. spirvifera and
T. cirrus (of the T. btpartita group), which it resembles in sculp-
ture, by their both possessing two sharp plications on the colum-
ella, while gatunenszs is nearly smooth, with only a faint sug-
gestion of a single fold. It is more difficult to discriminate be-
T. gatunensts and some variations of 7: Wolfgang, as these two
species are very closely allied.

T. gatunensts is found on the Isthmus at Gatun, Mindi, and
Monkey Hill; and Cossmann refers a fragmentary shell from Mar-
tinique to this species.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

197 DoMINICAN FosstLs-—MAURY Be

Terebva Wolfgangt Toula
Plate 4, Figure 6

Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
225, 1873. Specimens Gabb Coll. Cornell Paleont. Museum No.
7666. Not 7. dislocata Say.

Terebra Wolfeangi Toula, Jahrbuch der K—K, Geol. Reichsanstalt
Wien, vol. 58, pp. 705, 706, pl. 28, fig. 7, 1908.

Terebra Wolfgangi Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila.,
PP- 340, 341, pl. 22, figs. I, 3-6, 1911.

Shell slender, acute, resembling 7. gatunensts in form and
size; whorls of a decollate shell twelve; ornamentation on each~
whorl consisting of a subsutural band, occupying slightly less
than one-third of the width of the whorl, and marked off by a
furrow beneath which are five spiral cords (the fifth sometimes
covered by the following whorl) extending to the suture of the
next volution. A striking characteristic of this species is that
the sub-sutural band is cut by several incised, revolving spiral
lines which bisect or trisect the band. The transverse sculpture
consists of many very fine riblets (about thirty-three on a whorl
with a diameter of 8mm). These cross the sub-sutural band in
a slightly obliquely direction, are interrupted by the furrow, and
become gently arcuate on crossing the five spiral cords. Length
of decollate shell 40 mm., greatest diameter 8 mm.

Toula likens 7. Wolfgangi to the recent 7. pertusa Born;
but on comparing our specimens with those of 7. pertusa in the
Newcomb collection, the relationship is evidently only a very
general one. The species has a much closer resemblance to the
fossil shells 7: gatunensis, spirifera and cirrus. The last two can
be quickly separated from Wolfgang? by their bi-plicate columellas;
but it is more difficult to distinguish Wolfgang7 from some forms
of gatunensis. The tri- or bi-secting of the sub-sutural band in
Wolfgangz is a useful guide.

A number of authors have reported Wolfgangz from the
Isthmus. It is to be regretted that we obtained no specimens of
this shell on our 1916 Expedition, and have only two collected

34 BULLETIN 29 198

by Professor Gabb without locality label further than Santo
Domingo.

Terebra Berlinere, n. sp.

Plate 4, Figures 7, 8

Shell slender and graceful, tapering to an acute spire, volu-
tions rounded between the sub-sutural zones, which slightly con-
strict the shell. Whorls twelve to fourteen, the two nuclear
smooth, the third and fourth ornamented with transverse riblets.
The sub-sutural band begins to appear on the fifth and becomes
defined on the sixth and seventh whorls. Spiral lines appear
faintly on the fourth and fifth but do not become sharply de-
fined until the eighth whorl. The sculpturing of the species is
remarkably beautiful. It consists on all but the earliest whorls
of the sub-sutural, constricting band occupying about one-fifth
of the whorl and marked off by a narrow sulcus, below which are
eight to ten narrow, flat spiral bands. Some of these may be
sub-divided, forming many fine threads resulting in as many as
fourteen or more spirals of different widths instead of the more
typical eight or nine sub-equal spirals. Transverse sculpture of
many very fineriblets, about thirty-six on a whorl having a di-
ameter of 8 mm.; but the riblets may become more crowded and
very close-set. Columella short, very sharply keeled at the back,
anterior canal deeply notched: Length 38, greatest diameter
9mm.

The species most closely resembling 7. Berliner are T.
gatunensts Toula and 7. cirrus Dall; but it can at once be dis-
criminated from these two species by its characteristically con-
vex whorls, constricting sub-sutural bands and much closer, finer,
and more delicate sculpture.

This, perhaps the most exquisite of all the Santo Domingo
Tertiary fossils is dedicated to the memory of Mrs. Sarah Berliner.
Localities. — (Exp’d ’16) Gravels, Rio Cana; Zones H and

I, Rio Cana, near Caimito.

199 DOMINICAN FossILs—MAuRY 35

Genus Conus Linné

Conus haytensis Sowerby

Plate 5, Figure 1

Conus Haytensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.

44, 1849.
Conus Haitensis Gabb ( in part), Trans. Amer. Phil. Soc., vol. 15, p.

Pypite Sy.

Conus Haitensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
p- 528, 1876.

Conus Haytensis Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., p.
341, I9It.

Shell very large, heavy, spire slightly elevated, spirally stri-
ate, sub-coronate; last whorl with a sub-angulate shoulder and
striate base; canal slightly reflexed. A large shell measures
110oX58mm. This species is akin to C. mols. It is found at
Bowden and Gatun.

Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone E,
Rio Gurabo at Los Quemados; Zone H, Rio Cano at Caimito.

Conus haytensts var. gurabensis, n. vat.

Plate 4, Figure 9

Shell large, solid; whorls about ten, the first three smooth,
the two and a half following sculptured with many vertical, sub-
equal riblets, interrupted by six small varices. The riblets and
varices are crossed by close-set, fine revolving threads forming a
somewhat cancellated ornamentation, quite different from the cor-
onated spire of typical haytensis. The riblets then become obso-
lete, and the following three and a half whorls are ornamented
only with the fine, delicate, sharply defined spirals. These de-
crease from fifteen or more and tend to become obsolete, so that
the summit of the last whorl retains traces of only about five.
Greatest diameter of shell 47 mm.

Locality. —(Exp’d’16) Zone B, Rio Gurabo at Los Que-
mados.

36 BULLETIN 29 200

Conus molis Brown and Pilsbry

Conus molis Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila. P- 343,
pl23) fis orn:

This large, Gatun species measures 124X71 mm. One ofa
number of our puzzling Dominican cones very kindly examined
by Dr. Dall was pronounced by him to be the young of C.
molts. This adds another species to those common to the Isth-
mus and Santo Domingo.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Conus Williamgabbi, n. sp.
Plate 5, Figure 2

Shell large, solid, conic; whorls twelve, the first two nuclear,
the following five forming the acute apex of the spire, remaining
volutions of the spire very flat, each ornamented with four or
more revolving spiral threads and with feebler growth-striz.
Body whorl roundly carinated at the shoulder; upper portion
smooth except for almost obsolete revolving striations, lower
third ornamented with rather irregular, wavy spirals. Columella
slightly plicate. Length 65, width 45 mm.

This fine Cone was among a number of specimens of C. hay-
tensts sent by Professor Gabb, but its extremely flat spire and
difference of form show it to be distinct. It was collected by
Professor Gabb in Santo Domingo and is named in his honor.

Conus symmetricus Sowerby
Plate 7, Figure 7

Conus symmetricus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 44, pl. 9, fig. 1, 1849.

Conus haitensis Gabb (in part), Trans. Amer. Phil. Soc.. vol. 15, p.
231, 1873.

Shell turbinate, short and broad, spire short, spirally striate;
body whorl sharply carinate at the shoulder, ornamented with
granulose spiral threads alternating with one or two finer smooth

201 DOMINICAN FossILsS—MAuURY an

spirals; the canal is slightly produced and a trifle reflexed.
Length of shell 29, greatest width 18 mm.

Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que-
mados.

Conus symmetricus variety domingensis Sowerby
Plate 4, Figure 10

Conus Domingensts Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
Pp. 45, 1849.

Conus Flaitensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
231, 1873. Not. C. haytensis Sowerby.

Conus Haitensis Guppy (in part), Quart. Jour. Geol. Soc. London, vol.
32, p. 528, 1876.

Conus domingensis Dall, Trans. Wagner Inst. Sci., vol. 3. pt. 6, p.
1583, 1903.

Conus domingensis Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila.,
P- 341, IgII.

Gabb and Guppy united Sowerby’s C. domingensis with C.
symmetricus. A specimen of the former species loaned by Dr.
Dall from the National Museum shows it to be a flat-topped,
broader shouldered mutation of C. symmetricus. This elegantly
sculptured Cone is very common in Santo Domingo and is found
at Bowden and Gatun.

Localities. — (Exp’d’16) Zones A, B, C, D, E, F, Rio Gur-
abo at Los Quemados; Bluff 1, Cercado de Mao.

Conus symmetricus variety semtobsoletus, n. vat.
Plate 7, Figure 8

Shell resembling C. symmetricus in form but larger and with
the granular spirals obsolete on the upper half of the body
whorl. Length 39, greatest width 24 mm.

The specimens were collected by Professor Gabb in Santo
Domingo.

Conus Sewalli,n. sp.
Plate 5, Figure 3; Plate 6, Figure 3

Shell rather large, sub-pyriform, spire short, acute; post-

28 BULLETIN 29 202

nuclear whorls about eleven, the first eight being spirally striate
and delicately coronate, the last three are slightly channeled and
strongly striated spirally; body whorl roundly angulate at the
shoulder whence the sides slope convexly to the base, the orna-
mentation is limited to the lower two-thirds of the whorl and
consists of beautiful, granular, spiral threads, the granules resem-
bling the beads of a necklace; margin of outer lip nearly straight;
posterior sinus rather deep; canal nearly straight. Length of
largest shell 59, greatest width 33 mm.

Dr. Dall most kindly examined this shell and noted that it
had no representative in the collection of the National Museum.
Apparently it is new.

I take the greatest pleasure in naming this, our most ex-
quisite Cone, in honor of Mr. Arthur Sewall of Philadelphia as a
token of regard and gratitude for his encouragement and valu-
able help in assisting the progress of the Expedition.

Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone E.
Rio Gurabo at Los Quemados.

Conus catenatus Sowerby
Plate 5, Figure 4; Plate 6, Figures 1, 2
Conus catenatus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
45, pl. 9, fig. 2, 1849. (Young shell).
Conus interstinctus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288, pl.
16, fig. 3, 1866. (Adult shell).
Conus catenatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873.
Conus catenatus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 527, 1876.

Heneken’s shell chanced to be very young and Sowerby
founded on it the species catenatus. Later Guppy described an
adult specimen from Jamaica as C. zz/erstinctus. We have a
series of the following sizes: 30X15; 40X20; 57X27; 85 X4o
mm. The smallest of these is very like the original type figured
by Sowerby. The largest Dr. Dall kindly compared with the
type of Guppy’s zzzerstinctus and found it to be identical.

Localities. — (Exp’d’16) Zone A, Rio Gurabo at Los Que-
mados; Guayubin to Mao road at the ford of Rio Cana.

203 DOMINICAN Fossits—Maury 30

Conus stenostomus Sowerby

Plate 6, Figure 4
Conus stenostoma Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
44, 1849.
Conus stenostoma Guppy, /d. vol. 22, p. 287, pl. 16, fig. 2, 1866.
Conus stenostoma Gabb, Trans. Amer, Phil. Soc., vol. 15, p. 230, 1873.
Conus catenatus Guppy (in part), Quart. Jour. Geol. Soc. London, vol.
32, p. 527, 1876. Not C. catenatus Sowerby.
Conus stenostomus Dall, Trans. Wagner Inst., vol. 3, p. 6, p. 1583,

1903.

Shell characterized by a sharply angulated shoulder, narrow
aperture, and profoundly sulcate posterior sinus. Our largest
shell measures 62 X 34 mm.

This species has also been found at Bowden.

Localities. — (Exp’d’16) Bluff 1, Cercado de Mao; Zone B,
Rio Gurabo at Los Quemados.

Conus consobrinus Sowerby
Piate 6, Figures 5, 6

Conus consobrinus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p- 45, 1849.
Conus consobrinus Gabb (in part), Trans. Am. Phil. Soc., vol. 15, p.
229, 1873. :
Conus consobrinus Guppy, Geological Magazine, London, New Series,
Decade 2, vol._1, pl. 17, fig. 3, 1874.
Conus consobrinus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 527, 1876.
Conus consobrinus Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p,
Syl 5 WOMEN
Conus (Chelyconus) consobrinus Cossmann, Journ. de Conchyliologie,
vol. 61, p. 46, pl. 3, figs. 17, 18, 1913.
This was one of the nine new Cones collected by Heneken in
1849. It has also been found at Bowden and Gatun.
Localities. —(Exp’d’16) Zones E and G, Rio Gurabo at
Los Quemados.
Conus granozonatoides, n. sp.
Plate 6, Figure 7

Shell biconic, elongated, spire prominent, its earlier whorls

40 BULLETIN 20 204

coronate; whorls about thirteen, the nuclear smooth; the first
eight post-nuclear ornamented by a row of many close-set
tubercles near the base of each volution and, posterior to the
tubercles, by several incised spiral lines, the tubercles become ob-
solete rather suddenly on the third volution from the last, but
the spirals continue, becoming fainter until they fade out com-
pletely on the last whorl; body whorl with a roundly angulated
shoulder whence it tapers to the base, marked by fine arcuate
growth lines with occasional coarser resting stages; spiral sculp-
ture of coarse, slightly granular threads strongest anteriorly, ob-
solete posteriorly; aperture narrow, outer lip when complete
notched at the summit, then swinging forward in a broad curve,
retracted at the base. Length of shell, 55, greatest width 24 mm.

Dr. Dall has very kindly examined this cone and pronouced
it near Guppy’s C. granozonatus.

Localities. — (Exp’d’16) Bluff 1, Cercado de Mao; Zones
A and G, Rio Gurabo, near Los Quemados.

Conus gracilissimus Guppy
Plate 6, Figure 8

Conus gracilissimus Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 288, pl. 16, fig. 4, 1866.

Conus Orbignyit Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873.
Not C. Orbignyi Audouin 1830.

Conus gracilissimus Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
Pp. 527, 1876.

Conus gracilissimus Dall, Trans. Wagner Inst. vol. 3, pt. 6, p. 1583.

Conus gracilissimus Cossmann, Journ. de Conchyliologie, vol. 61, pl.
Al sober, 1A, WES).

The three Cones, C. gracilissimus, granozonatus and conso-
brinus, are very closely related; and various authors have placed
one or the other in synonymy. This is but one case of the in-
tergradation of forms which is highiy characteristic of the Do-
minican shells. One must either run very dissimilar forms to-
gether, as did Gabb, or to some extent ignore connecting links.

C. gracilissimus is widely distributed. Guppy found it at

205 DoMINICAN Fossi_s-—-MAuRY AI

Cumana, in the Manzanilla beds of Trinidad and at Bowden.
Our shell measures 4oX16 mm. It was collected by Gabb in
Santo Domingo.

Conus tortuosostriatus Toula

Plate 6, Figure 9

Conus (Chelyconus) tortuosostriatus Toula, Jahrb. der K—K. Geol.
Reichsanstalt Wien, vol. 61, p. 508, pl. 31, fig. 22, I9II.

Conus (Hemiconus) tortuosostriatus Cossmann, Journ. de Conchy-
liologie, vol. 61, p. 40, pl. 3, figs. 28, 29, 1913.

Shell slender, graceful; spire elevated; whorls about ten,
the first two smooth, nuclear; post-nuclear whorls sharply cari-
nate, denticulate, marked by strong arcuate growth-lines and
several incised spiral lines. Body whorl ornamented with about
twenty, narrow, flat spiral bands with narrower interspaces.
Length 22, width 8 mm.

This pretty Cone is very near to C. gracilissimus, differing
chiefly in the proportion of length to breadth, the ratio being
approximately 3 to 1 against 2 to I.

Localities. — (Exp’d ’16) Zones G and EH, Rio Gurabo at
Los Quemados.

Conus ornatus (Gabb’s name), n. sp.

Plate 6, Figure 10

Conus ornatus Gabb, MS. Specimen No. 7671 Cornell University Mu-
seum. No description found.

Shell of medium size, solid, spire very low, each of its volu-
tions marked with four strong spiral threads and faint arcuate
growth lines; body whorl sharply carinate, beneath the carina
the sides slope slightly convexly and steeply to the base; orna-
mentation of about twenty-one very sharply incised spiral lines,
obsolete on the upper fourth of the whorl. Length of shell 45,
greatest width 27 mm.

Our specimen was collected by Gabb in Santo Domingo and

42 BULLETIN 29 206

labelled C, ornatus. JI fail, however, to find any published de-
scription of this species.

Conus proteus Hwass
Plate 6, Figure 11

Conus proteus Hwass, Enc. Meth. vers, I pt. 2, p. 682, 1789.

Conus proteus ? Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 232, 1873.

? Conus Berghausti ? Gabb, /d. p. 232. Not of Hoernes, Foss. Wie-

ner Beck. pl. I, fig. 3.

Conus proteus Dall, Trans. Wagner Inst., vol. 3, pt. I, p. 26, 1890.

Like the recent C. proteus, our fossils have four or five re-
volving rows of orange colored dashes, including less conspicuous,
fainter, intervening rows. ‘The proportions of one of our shells
are like the recent, measuring 42X23 mm. But that figured is
longer, measuring 51 X 27.

This species has lived on almost without change since the
blue clays were accumulating on the sea floor. It is also found
in the Florida Pliocene.

Localities. —(Exp’d ’16) Zone H, Rio Cana at Caimito,
Zone D, Rio Gurabo at Los Quemados.

Conus Vanattaz, n. sp.
Plate 6, Figure 12

Shell solid, turbinate, the length twice the width; remaining
whorls seven, their summits marked by arcuate growth-lines, not
striate, slightly, broadly channeled; body whorl sharply carinate
at the shoulder whence the sides taper evenly to the base,
body sculptured with twelve raised, revolving threads 3 mm.
apart at the center, closer at the base. Length of shell qo,
greatest width 20 mm.

This shell was collected by Professor Gabb in Santo Domin-
go and thought by him to be a mutation of C. planzliratus, but
it is evidently distinct. It is named in honor of Dr. E. G. Van-
atta of the Philadelphia Academy. i

Conus furvoides Gabb
Plate 7, Figures 1, 2

Conus furvoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 232, 1873.

207 DOMINICAN FossILs—MAuRY 43

Shell elongate, nearly or quite smooth, sometimes with a few
wavy spirals anteriorly, spire acute, rather low, with the later
whorls deeply channeled. Length 41, width 20 mm. Apparently
this is Gabb’s unfigured species.

One of our specimens from Cercado retains its delicate lin-
ear, revolving color pattern, of gray lines on a white background.
The color scheme is of the general style of C. “gnarius Reeve.

Localities. — (Exp’d ’16) Bluff 2, Cereado de Mao; Zones H
and I, Rio Cana at Caimito.

Conus Olssont, n. sp.
Plate 7, Figure 3

Shell of medium size, very elongate, the length considerably
more than twice the width; spire one-twelfth of the total length.
Whorls eleven, the first two forming the protoconch rise abrupt-
ably above the following whorls, on which they rest like a min-
ute but striking pinnacle visible to the unaided eye. The three
whorls following the protoconch are flattened and discoidal, the
subsequent six slope more rapidly towards the shoulder angle of
the body whorl, they are convexly rounded between the deeply
impressed suture lines, and marked with slightly arcuate, oblique
growth-lines. The specimen described shows only very faint,
nearly obsolete striz on the spire. Body whorl roundly angu-
lated at the shoulder, thence tapering evenly and gradually to
the base, smooth except for a few irregular, more or less obsolete
basal striz. Length 38, width 16 mm.

This species is named in honor of Mr. Axel Olsson, by whom
it was collected.

Locality. —(Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados.

Conus cercadensis, N. sp.

Plate 7, Figure 4

Shell short, broad, solid, ficiform; nuclear whorls two; first
four post-nuclear whorls with a well-defined, slightly overhang-

AA BULLETIN 29 208

ing carina; subsequent four or five whorls broadly channeled, the
channeling being most apparent on the summit of the last whorl;
spire with no trace of spiral strize, but sharply marked by arcuate
growth-lines; body whorl markedly convex below the shoulder
carina, giving the shell its characteristic fig-shaped form; the
sculpture of the last whorl consists of a varying number of spira]
ridges, strongest anteriorly, fading out more or less posteriorly;
some adult shells have the upper half of the body whorl nearly
or quite smooth, while in others it is striate to the shoulder;
aperture rather wide, posterior sinus deep. The relative pro-
portion of breadth to height varies as follows: 27X16, 28X18,
29X20, 35X23 mm.

Our specimens are identical with some labelled by Gabb C.
cedo-nulli? But they are not the true C. cedo-nulli of Hwass.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Abun-
dant and characteristic.

Conus Kitteredget, n. sp.

Plate 7, Figures 5, 6

Shell with a short, acute, very concave spire, one-seventh
the length of the shell, which is less than twice the width; earli-
est two post-nuclear whorls faintly crenulate, the following three
slightly carinate; a channel appears on the penultimate volution
of the spire and on the last becomes well marked; spiral striz
absent, the spire being smooth except for arcuate growth-lines;
body whorl roundly angulated at the shoulder, the sides sloping
convexly to a rather broad base; upper two-fifths of the last
whorl typically nearly smooth, showing only faint, obsolete
spiral striations; lower three-fifths with well-spaced, narrow
ridges; aperture wide; outer lip sharp; posterior notch deep.
Length of shell 31, greatest width 17 mm’

We have specimens with the ridges extending almost or
quite to the shoulder of the body whorl (fig. 6). These appear
to be a variety. They were found in the same zones as the typ-
ical shells.

209 DOMINICAN FossILS—MAuRY 45

This species is closest to C. cercadensis, from which it can
be distinguished by the concave spire and the much less con-
vexity of the body whorl below the shoulder. They were analo-
gous species, — C. cercadensis being characteristic of the Mao and
C. Kitteredget of the Cana Rio.

I take great pleasure in naming this species in honor of Mr.
and Mrs. Kitteredge of Hastings-on-the-Hudson.

Localities. —(Exp’d ’19) Zones H and I, Rio Cana at Cai-
mito.

Conus recognitus Guppy
Plate 7, Figure 9

Conus solidus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 45,
1849. Not C. solidus Sowerby, Zool. Proc. 1841: Conch. Illust.
Conus No. 76, pl. 56, fig. 56.

Conus solidus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 287, pl. 16,
fig. 1, 1866.

Conus recognitus Guppy, Proc. Sci. Assoc. Trinidad, p. 171, 1867.

Conus pyriformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 229, 1873.
Not C. pyriformis Reeve, Conch. Icon., vol. 1, pl. 13, fig. 70, 1843.

Conus recognitus Guppy, Quart, Jour. Geol. Soc. London, vol. 32, p.
527, 1876.

Conus recognitus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583,
1903.

The recent C. pyriformis is the descendant of migrants
through the Isthmus to the West Coast.

Conus recognitus also occurs at Bowden.

Localities. — (Exp’d’16) Bluff 3, Cercado de Mao; Zone D,
Rio Gurabo at Los Quemados; Zones H and I, Rio Cano at
Caimito.

Conus planiliratus Sowerby
Plate 7, Figure 10

Conus planilivatus Sowerby, Quart. Jour. Geol. Soc. London. vol. 6,
p. 44, 1849.

Conus planiliratus Guppy, /dem, vol. 22, p. 287, pl. 16, fig. 7, 1866.

Conus planilivatus Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, P

46 BULLETIN 29 210

230, 1873.

Conus planiliraius Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
528, 1876.

Conus planiliratus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583,
1903.

Cf. Conus planilivatus Cossmann, Journ. de Conchyliologie, vol. 61, p.
48, pl. 3, figs. 25, 26, 27, 1913.

Shell characterized by its concave spire and last whorl sculp-
tured with twenty prominent bands, alternating with sulcate in-
terspaces lightly striated longitudinally. Length 34, width
15 mm.

Sowerby’s recent C. planilivatus (Proc. Zool. Soc., p. 255,
pl. 22, fig. 1) is altogether different. The fossil species occurs
in the Caroni Series, Trinidad, and at Bowden. ‘The type local-
ity is Santo Domingo. The recent C. Stearnsiz Conrad may be
a descendant.

Conus marginatus Sowerby
Plate 7, Figure 11

Conus marginatus Sowerby, Quart. Jour. Geol. Soc, London, vol. 6, p.

44, 1849.
Conus marginatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873.

Conus marginatus Guppy, Quart. Jour. Geol. Soc. London, vol. 32. p.
528, pl. 29, fig. 5, 1876.

Cf. Conus (Chelyconus) marginatus Cossmann, Journ. de Conchylio-
logie, vol. 61, pp. 44-46, pl. 3. figs. 14, 15, 1913.

Shell small, broad and short, spire high, carinate, not coro-
nate; last whorl deeply sculptured with about sixteen alternating,
narrow bands and grooves, the latter marked with longitudinal
strie. Length 19, width 11 mm.

The nearest ally is €. gaza. Guppy reported C. marginatus
from the Manzanilla beds, Trinidad.

Localities. — (Exp’d ’16) Zones D and G, Rio Gurabo at
Los Quemados.

Conus gaza Johnson and Pilsbry
Plate 7, Figure 12

2X11 DOMINICAN FossiL.s—MAurRyY 47

Conus gaza Johnson and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 342,
fol, Aa, WES, Buea,

Shell biconic, spire about one-third of the total length, di-
ameter one-half the length; post-nuclear whorls about nine,
lower edge of each carinate, last whorl sharply angulate at the
shoulder, sculptured with twenty to twenty-two flattened ridges
alternating with grooves striated by lines of growth. Length 25,
width 14 mm.

Our specimens show but one tuberculated post-nuclear
whorl. This is said to be characteristic of the Dominican repre-
sentation of the species, while the Isthmian have two tubercu-
late whorls immediately following the nuclear.

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao.

Conus Bonaczyt Gabb
Plate 7, Figure 13

Shell small, its sides curved, tapering gradually to the base;
shoulder angle rounded, spire low, acute, its sides concave; body
whorl ornamented by alternating grooves and flat or slightly
rounded ridges, the grooves are marked by longitudinal growth-
strie but the ridges are smooth. Length of shell 25, greatest
width 11 mm.

This species has never before been figured and we have no
metatype, but our shells answer to the description of C. Bon-
aczyt.

Locality. —(Exp’d’16) Zone G, Rio Gurabo at Los Que-
mados.

Conus Karlschmidti, n. sp.
Plate 7, Figure 14
Shell of moderate size, length just twice the width; spire
prominent, acute, one-fourth the total length in younger shells,

less prominent in adult specimens; post-nuclear whorls about
nine, of these the first two and a half are very finely coronate

48 BULLETIN 29 212

and the first four carinate, the subsequent spiral volutions are
marked by spiral threads and by arcuate growth-lines; body
whorl sharply angulate at the shoulder, from which the sides
slope slightly convexly to the base, ornamented from shoulder to
base by close-set spiral threads, sub-equal and numbering about
thirty-five. Length of largest shell 32, greatest width 16 mm.

The young and relatively higher spired shells approach C.
tmitator Brown and Pilsbry, but differ in sculpture. This spe-
cies is dedicated to Mr. Karl Schmidt, by whom it was found.

Localities. — (Exp’d ’16) Bluff 1. Cereado de Mao; Zone E,
Rio Gurabo at Los Quemados.

Conus Dalli Toula
Plate 7, Figure 15
Cf. Conus spec. Toula, Jahrb. der K—K. Geol. Reichsanstalt, Wien,
vol. 58, p. 710, pl. 25, fig. 18, 1908. (Fragment).
Conus Dallt Toula, Zdem, vol. 61, p. 508, pl. 31, fig. 23 a-d, IgII.
Conus (Lithoconus) Dalli Cossmann, Journ. de Conchyliologie. vol.
Sie Os Abi, jolls By uss) Yo), Bie yall, dh, ses, 7, Sh Se
Shell conic, whorls about nine, the nuclear smooth; subse-
quent volutions of the spire marked by three or four impressed
spiral lines and arcuate growth-lines. Shoulder of body whorl
very sharply carinate; upper portion nearly smooth, lower por-
tion ornamented with a varying number of narrow, flat bands
tending to alternate with fine spiral threads. Length 23, width
11mm. Collected by Gabb in Santo Domingo.

Genus SurcuLA H. and A. Adams

Surcula jaqguensis Sowerby
Plate 8, Figure 1

Pleurotoma Jaquensis Sowerby, Quart. Jour. Geol. Soc. London, vol.
6, p. 51, 1849.

Turris (Surcula) Henekeni Gabb (in part), Trans. Amer. Phil. Soc.,
vol. 15, p. 207, 1873. Not 7. Hlenekent Sowerby.

Pleurotoma Hlenekent Guppy (in part), Quart. Jour. Geol. Soc., vol.
32, p. 526, 1876.

Shell with about eight whorls, marked posteriorly by a broad

ae ee eee

213 DoMINICAN FossILs-—MAURY 49

sub-sutural fasciole smooth except for arcuate growth-striz, be-
low this fasciole the whorls are ornamented with strong, rounded,
longitudinal ribs numbering nine on the last volution, and with
coarse spiral threads, about six on the penultimate whorl. Length
of decollate shell 49, greatest width 17 mm.

Our specimens were collected by Gabb in Santo Domingo.

Surcula labiata Gabb
Plate 8, Figure 2

Clavatula labiata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 209, 1873.
Clavatula labiata Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
74, pl. 28, fig. 3, 1876.

Shell with nine whorls, the first two nuclear, the third ver-
tically ribbed; subsequent whorls with a deep sub-sutural chan-
nel beneath which the whorl is angulated, bearing on the carina
about ten oblique tubercles which become obsolete on the latter
part of the last volution; outer lip rugose internally, very arcu-
ate, margin thickened, lip-sinus very deep, situated adove the
carina. Length 20, width 9 mm.

Localities. — (Exp’d ’16) Zones D and E, Rio Gurabo at
Los Quemados.

Surcula riomaonts, n. sp.

Plate 8, Figure 3

Shell slender, fusiform, with a smooth, glassy two-whorled
protoconch, and six post-nuclear whorls; the latter part of the
protoconch and the first whorl of the post-embryonic shell are
distinctly carinated; subsequent whorls gently convex; longitu-
dinal sculpture of rounded ribs, arcuate on the body whorl, and
numbering about nine on that and the penultimate volution; the
tibs do not cross the narrow sub-sutural channels, which are
marked only by rather heavy, raised, slightly arcuate growth-
lines; spiral sculpture of fine, uniform raised threads, absent
only from the sub-sutural channels; aperture rather long;

50 BULLETIN 29 aI4

canal somewhat reflexed; posterior sinus very shallow, lying
close to the suture. Length 13, width 4 mm.

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao.

Genus Turris Bolten

Turris albida Perry
Plate 8, Figures 4-8

Pleurotoma albida Perry, Conch. Expl., pl. 32, fig. 4, 1811.

FPleurotoma virgo Vamarck, An. s. Vert., vol. 7, p. 94, 1822.

Pleurotoma c ochlearis Conrad, Jour. Acad. Nat. Sci. Phila., 2d ser.,
vol. I, p. 115, pl. 11, fig. 23, 1848.

Pleurotoma haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
Pp. 50, 1849.

Pleurotoma virgo Moore, Quart. Jour., vol. 9, p. 130, 1853.

Pleurotoma barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
Pp. 290, pl. 17, fig. 6, 1866.

Pleurotoma antillarum Crosse, Journ. de Conchyliologie, vol. 13, p. 34,
pl. 1, fig. 8, 1865. (Not of d’Orbigny).

Turris (Surcula) virgo Gabb, Trans. Amer. Phil. Soc., vol. 15, pp.
206, 207, 1873.

Pleurotoma albida Dall, Bull. Mus. Comp. Zoology Harvard Coll., vol,
18, pp. 72, 73, 1889; Trans. Wagner Inst., vol. 3. pt. I, p. 28, pl. 4,
fig. 8a, 1890.

Pleurotoma albida var. tellea Dall, Bull. Mus. Comp. Zoology Harvard
Coll., vol. 18, p. 73, 1889.

Pleurotoma albida Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila.,
P- 343, I9II.

Pleurotoma haitensts Cossmann, Journ. de Conchyliologie, vol. 61, pp.
16-18, pl. 2, figs. I-4, 1913.

Pleurotoma cf. antillarum Cossmann, Journ. de Conchyliologie, vol.
61, p. 18, pl. 2, figs. 5, 6, 1913.

Turris albida Dall, Bull 90 U. S. Nat. Museum, p. 38, pl. 5, fig. 13, pl-
14, fig. 7, 1915.

Our Santo Domingo specimens represent five mutations: —
(1) Turris albida hattensis (fig. 4), which corresponds with Sow-
erby’s type and with Chipolan shells from Florida; (2) 7: alézda
Barrett: (fig. 5), a handsome variety described by Guppy from

215 DOMINICAN FosstLsS—MAuURY 51

Jamaica; (3) TZ. albida virgo (fig. 6); (4) TZ. albida tellea
(fig. 7); (5) 7: albida antillarum (fig. 8).

This species ranges from the Vicksburg Oligocene to the
recent. It occurs as a fossil at Bowden, Cumana, Gatun and
elsewhere.

Localities. — (Exp’d ’16) Bluffs 1 (abundant), 2 and 3,
Cercado de Mao; Zones A,B,E,F, Rio Gurabo at Los Quemados;
Zone I, Rio Cana at Caimito; between Hato Viejo and Potrero,
Rio Amina. Varietal forms: Z. albida tellea, Zone A, Rio Gur-
abo; 7. albida virgo, Zone 1, Rio Cana; 7. albida antillarum,
Zones A, B, Rio Gurabo; Bluff 1, Cercado de Mao.

Genus BorsontiA Bellardi

Borsonia varicosa Sowerby
Plate 8, Figure 9

Cordiera varicosa Sowerby fide Gabb, Trans. Amer. Phil. Soc., vol,
15, p- 210, 1873.

Our specimen was collected by Gabb in Santo Domingo. It
has the biplicate columella and characteristic notch of Gorsonza.
The present members of this genus are living in the abyssal
zone of the Antilles.

Genus DRILLIA Gray

Drillia fustformis Gabb

Plate 8, Figures Io, 11

Derfancia fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 209,
1873.

Drillia ( Crassispiva) Henekeni Cossmann, Journ. de Conchyliologie,
vol. 61, pl. 3, figs. 10, 11, 1913. Not D. Henekent Sowerby.

The Gatun analogue of this shell is D. Zookt Brown and
Pilsbry. We have several metatypes of the Dominican species.

Locality. —(Exp’d ’16) Zone B, Rio Gurabo at Los Que-
mados.

52 BULLETIN 29 216

Drillia cercadonis, n. sp.

Plate 8, Figure 12

Shell slenderly fusiform, whorls ornamented with longitudi-
nal undulating ribs, about nine on the last two whorls, not ex-
tending to the posterior suture; the suture is well defined, linear,
edged by a sharp, raised spiral thread forming the upper border
of the sub-sutural channel which is perfectly smooth except for
delicate, microscopic, arcuate growth-lines; spiral sculpture of
fine, sub-equal, sub-equidistant raised spiral threads crossing ribs
and interspaces. Length 32, width 9 mm.

This species can be differentiated from D. fusiformis by its
broad, smooth sub-sutural channel, and its finer, more uniform
spirals. The Gatun analogue of this species is Dyrillia fusinus
Brown and Pilsbry

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao (rare).

Drillia venusta Sowerby
Plate 8, Figures 13, 14

Pleurotoma venusta Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 50, pl. 10, fig. 7, 1849.
Pleurotoma venustum Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 289.

1866,

Turris ( Drillia) venusta Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
208, 1873.

Pleurotoma venusta Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p- 527, 1876.

Pleurotoma venusta Guppy and Dall, Proc. U. S. Nat. Museum, vol.
19, NO. ILI, p. 305, 1896.

At first glance our Chipolan specimens of JD). jamazcenstis ap-
pear identical with the Dominican shells, but the spiral sculp-
ture of the former consists of groovings, and of the latter of
raised narrow bands. J. venusta occurs at Bowden and Point-
apier, Trinidad.

Localities. — (Exp’d ’16) Bluff I, Cercado de Mao (abund-
ant); Zones B, D, E, Rio Gurabo at Los Quemados; Rio Amina
between Potrero and Hato Viejo.

. +t ae

217 DOMINICAN FossILS—MAURY 53

Drillia consors Sowerby
Plate 8, Figures 15, 16

Pleurotoma consors Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
Pp- 50, 1849.

Fleurotoma consors Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 280,
1866.

Turris (Drillia) militaris Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
207, 1873. Not D. militaris Hinds, Proc. Zool. Soc., p. 38, 1843.

Pleurotoma consors Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
P- 527, 1876.

Pleurotoma sp. aff. Pl. alesidota (Dall) var. macilenta Toula, Jahr-
buch der K—K. Geol. Reichsanstalt Wien, vol. 61, p. 506, pl. 30,
fig..11, 1911. Not alesidota var. macilenta Dall 1889.

Drillia consors Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p.
345, IQII.

Drillia consors Cossmann, Journ. de Conchyliologie, vol. 61, pp. 20-22,
pl. 2. figs. 8-14, 1913.

This shell has a slight resemblance to D. mzlztaris Hinds
from Panama; but is very like D. alstdota macilenta Dall
dredged by the Blake off Barbados at 103 fathoms. This slen-
der deep sea shell is apparently the descendant of our fossil.

D. consors occurs at Bowden, Gatun, Mindi, and Martinique.
The type locality is Santo Domingo.

Locality. — (Exp’d’16) Zone A, Rio Gurabo at Los Que-
mados. (Rather common).

Drillia Henekent Sowerby
Plate 8, Figures 17, 18

Pleurotoma Hentkert Sowerby, Quart. Jour. Geol. Soc. London, vol.
6, p. 50, pl. 10, fig. 6, 1849.

Turris (Surcula) Henekeni Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
207, 1873. Exclude jaguensis from synonymy. ~

Pleurotoma henekeni Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p. 526, 1876. Exclude jaguensts.

Not Drillia henekeni Cossmann, Journ. de Conchyliologie, vol. 61, pl.
3, figs. 10, 11, 1913. (=D. _fustformis Gabb). -

Colonel Heneken’s name was erroneously thought to be
Henekeri when he sent his first collection to the Geological

54 BULLETIN 29 ars

Society. This large Drzldia named for him by Sowerby has also
been found at Bowden.

Localities. —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao.

Drillia squamosa Gabb
Plate 9, Figure I

Turris (Drillia) squamosa Gabb, Trans. Amer. Phil. Soc., vol. 15,

Pp. 208, 209, 1873.
Pleurotoma squamosa Guppy, Quart. Jour. Geol. Soc. London, vol.

22 Dei 527eple 2Orutl 20/715) LOO.

This striking Drillia is easily recognized by its bold, oblique,
sharp-edged ribs, and its squamose surface. We have meta-
types and some fine specimens of our own. The shell has not
been found outside of Santo Domingo.

Locality. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que-
mados.

Dritha riogurabonis, n. sp.

Plate 9, Figure 2

Shell with three smooth nuclear and five post-nuclear whorls,
ornamented with rather sharp longitudinal ribs of which there
are ten on the body whorl, the last rib being thickened, forming
a small varix; the ribs extend from suture to suture; spiral
sculpture of faint striz almost obsolete except on the anterior
part of the shell; margin of outer lip thin, the external varix ly-
ing a short distance back of the lip; posterior sinus deep, nar-
row, adjoining the suture; anterior canal bent slightly forward
as though deformed. Length of shell 9, greatest width 3.50
mm. Largest specimen measures 11 X 4.50 mm.

This species is the same general type as the recent, smaller
D. lissotropis Dall, dredged by the Blake among the Antilles in
127-248 fathoms.

Locality. —(Exp’d °16) Zone D, Rio Gurabo near Los
OQuemados.

219 Dominican Fossirs—MaurRy 5s

Drillia cf. magnoliana Olsson

We have a single worn shell from Zone I, Rio Cana, near
Caimito, which is of the same general type as D. magnoliana
Olsson, from the Late Miocene of the Natural Well, Duplin
County, North Carolina. Unfortunately, our shell it too eroded
for an exact comparison.

Drillia losquemadica, n. sp.
Plate 9, Figure 3

Shell of moderate size, with nine whorls, the last sometimes
bearing a varix; first two volutions smooth, convex, nuclear;
subsequent volutions separated by a distinct linear, wavy suture,
beneath which is a raised spiral thread bordering the posterior
edge of the sub-sutural fasciole; whorls sculptured below the fas-
ciole with straight, longitudinal ribs numbering fifteen on the
last whorl; the ribs do not cross the fasciole; spiral sculpture of
flattened threads (six on the penultimate and about twenty on
the ultimate whorl) crossing ribs and interspaces; posterior sinus
U-shaped, well-defined in adult shells; outer lip thin with about
half a dozen strong liree far within. Length of largest shell 19,
greatest width 6.50 mm.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo near Los
Quemados.

Drillia Donalbertonis, n. sp.
Plate 9, Figure 4

Shell rather small, solid, with two smooth, nuclear whorls;
post-nuclear volutions seven, boldly sculptured with strong,
rounded, straight, longitudinal ribs (fifteen on the last whorl)
cut short by the broad, conspicuous sub-sutural fasciole which
equals nearly one-half of the axial width of the whorls of the
spire; spiral sculpture of somewhat stronger threads alternating
with groups of finer lines; the spirals extend over the ribs, inter-
spaces and sub-sutural fasciole, the posterior edge of which is
bordered by aslightly stronger spiral; outer lip thin, with an external

56 BULLETIN 29 220

varix behind it; canal short, reflexed. Length of shell 13.5,
greatest width 5 mm.

Locality. — (Exp’d’16) Zone D, Rio Gurabo near Los Que-
mados.

Drillia maontsriparum, n. sp.
Plate 9, Figure 5

Shell with three nuclear whorls, the first two smooth, the
third ribbed; post-nuclear whorls five, separated by a linear su-
ture, beneath which is a prominent spiral ridge forming the up-
per border of the sub-sutural channel; the latter is marked by
arcuate growth-lines and several fine spiral threads; below the
sub-sutural channel the whorls are sculptured by about fifteen
tather sharp, straight, longitudinal ribs, several of which may be
replaced on the body whorl by a single rounded varix; in the
interspaces between the ribs are numerous spiral threads which
cross the varix but not the crests of the ribs; the spirals extend
to the base of the shell but the ribs terminate below the convex-.
ity of the body; outer lip sharp; posterior sinus deep, small, cir-
cular. Length 9.5, width 4 mm.

Localities. — (Exp'd ’16) Bluff 2 (rare), Bluff 3 (fairly com-
mon), Cercado de Mao.

Drillia hispantole, n. sp.

Plate 9, Figure 6

Shell small, slender, graceful, with eight whorls, the first
two smooth nuclear, post-nuclear whorls six, ornamented by
close, rounded, slightly arcuate, longitudinal ribs of which there
are twelve and a rounded varix on the last whorl; the ribs stop
short at the anterior edge of the narrow sub-sutural channel,
which is bordered on its posterior edge by an inconspicuous
spiral ridge; spiral sculpture of equal, equidistant threads which
cross the crests of the ribs as well as the interspaces and varix;
posterior sinus deep, narrow, U-shaped; outer lip sharp. Length
9.5, width 3.25 mm.

22h DOMINICAN Fossiirs-——-MauRY shy

This shell can be distinguished from D. maontsriparum by
its two-whorled protoconch, rounded ribs crossed by the spirals,
and U-shaped sinus.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Drillia islalinde, n. sp.
Plate 9, Figure 7

Shell with a single varix on the latter half of the body
whorl beyond which the sculpture changes from ribbed to sub-
cancellate; post-nuclear whorls with narrow, sharp, oblique ribs,
fourteen on the penultimate whorl, present on the first half of
the body whorl where extra ribs may be intercalated; spiral
sculpture of incised lines not crossing the ribs; sub-sutural fas-
ciole channeled on the last half of the body whorl and marked
by raised growth- lines; outer and inner lips smooth; sinus
deep, U-shaped. Length 15, width 5.5 mm.

Localities. — (Exp’d’16) Zone G, Rio Gurabo at Los Que-
mados; Zone I, Rio Cana at Caimito. Varietal form, Bluff 1,
Cercado de Mao.

Genus CLAvA Martyn
Clava plebeta Sowerby

Plate 9, Figure 8

Cerithium plebetum Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p- 51, 1849.

Cerithium plebeium Guppy, Quart. Jour., vol. 22, p. 290, pl. 16, fig. 9,
1866.

Cerithium plebeium Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238,
1873.

Cerithium plebetum Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519,
1876.

Clava plebeia Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 290, 1892.

The type of this species was collected by Heneken in Santo

Domingo and named by Sowerby. Later Guppy found it at
Bowden, Cumana and Anguilla.

538 BULLETIN 29 Z22

Localities. — (Exp’d’16) Zones B, D, E, F, G, Rio Gurabo
at Los Quemados. (Common).

Genus MANGILIA Risso

Mangilia maoica, n. sp.
Plate 9, Figure 9

Shell small, turreted, nuclear whorls four, glassy, the last
volution carinated and delicately longitudinally ribbed; post-nu-
clear whorls four, strongly carinated in young shells but in the
adult the last whorl becomes gently rounded, losing the carina;
in some specimens the entire surface is adorned with microscopic,
frosty, beaded spiral threads alternating with still finer granular
lines, in other shells the beaded spirals are inconspicuous over
the general surface, but become progressively stronger on ap-
proaching the suture, the one bordering the suture being the
strongest; whorls with ten undulating ribs, slightly tuberculate
at the carina, extending from suture to suture; outer lip thick-
ened in adult, sinus U-shaped, deep. Length 4, width 1.5 mm.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Mangilia Lalonis, n. sp.
Plate 9, Figure Io

Shell with seven strongly carinate whorls, the first two nu-
clear, the apical being invariably set at an angle to the main
axis of the shell, and the second strongly keeled and delicately
ribbed as in the preceding species; post-nuclear whoris five,
adorned with straight longitudinal ribs, extending from suture
to suture, and numbering nine on the last whorl; spiral sculpture
of frosty, beaded threads, with groups of two or three finer be-
tween the larger threads; in adult shells the posterior sinus is in-
conspicuous; outer lip not thickened. Length of shell 6, great-
est width 2.5 mm.

Closely related to 47. maotca, but in this shell the body
whorl is strongly carinate, the ribs straight, the sinus inconspic-

223 DOMINICAN FOssILS—MAURY 59

uous. Also like WZ. erttima Bush, living off Hatteras, but the
protoconchs are entirely different.

Localities. — (Exp’d ’16) Bluff 2 (rare), Bluff 3 (very com-
mon), Cercado de Mao.

Genus CyTHARA Schumacher

Cythara gibba Guppy

Plate 9, Figure 11

Cythara gibba Guppy, Proc. U. S. Nat. Mus., vol. 19, no. IIo, p. 306,

pl. 27, fig. 9, 1896.
Cythara gibba Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583,

1903.

Shell small, with six shouldered whorls, the first two smooth;
nuclear; post-nuclear whorls carinated, and with longitudinal
ribs (ten on the body whorl), and rather distant spiral threads;
posterior sinus very large and deep, U-shaped, lying close to the
suture; outer lip much thickened and bearing within near the
posterior sinus a single large denticle; anterior canal short.
Length of shell 3.9, greatest width 2 mm.

Locality. —(Exp’d ’16) Bluff 2, Cercado de Mao. (Very
rare).

Cythara elongata Gabb
Plate 9, Figure 12

Mangilia elongata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873;
Jour. Acad. Sci. Phila., vol. 8, p. 351, pl. 46, fig, 34.
Cythara elongata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583,

1903.

Shell small, slender, whorls eight, the first three smooth, nu-
clear; post-nuclear whorls ornamented by six narrow, longitudi-
nal ribs sub-continuous from whorl to whorl; interspaces broad,
shallow; the last rib forms the varix of the outer lip; spiral
sculpture absent; posterior sinus deep U-shaped ; aperture nar-
row; anterior canal short. Length of shell 6.50, greatest width
2mm.

60 BULLETIN 29 224

Type locality Santo Downe. Also found at Bowden.

Localities. —(Exp’d ’16) Bluffs 2 and 3, Cercado de Mao;
Zone H, Rio Cana. (Very rare except at Bluff 3).

Cythara polygona Gabb
Plate 9, Figure 13

Mangilia polygona Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873.

Shell small, gracefully fusiform, with seven whorls, the first
three smooth, nuclear; subsequent four whorls ornamented with
about seventeen delicate, slightly sinuous, longitudinal ribs with
shallow concave interspaces crossed by very many close, fine,
spiral threads; aperture long, rather narrow; inner lip smooth;
outer lip with a single ill-defined denticle near the posterior sinus,
which is rather shallowly U-shaped. Length of largest specimen
II, greatest width 4.5 mm.

Our shells appear to be Gabb’s unfigured C. polygona.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Very
abundant; about 200 shells were collected).

Cythara caimitica, n. sp.

Plate 9, Figure 14

Shell with seven whorls, the first three embryonic; post-nu-
clear whorls with narrow, sharp, longitudinal ribs (seventeen or
eighteen on the last whorl), the last rib is represented by the
varix bordering the outer lip; spiral sculpture of very faint,
rather distant, microscopic incised lines; aperture medium; in-
ner lip smooth; outer lip with a varix and a sharply defined 1n-
ternal longitudinal ridge which terminates in a denticle just an-
terior to the shallow posterior sinus. Length 10, width 5 mm.

This species resembles the shells referred to C. polygona, but
differs as follows: — (1) The spirals are incised lines; (2) the lip
has a varix externally and and a longitudinal ridge internally.

Locality. —(Exp’d ’16) Zone I, Rio Cana, near Caimito.

225 DOMINICAN Fossirs—MAURY 61

Cythara cercadica, n. sp.
Plate 9, Figure 15

Shell fusiform,with seven whorls, the first two nuclear; post-
nuclear whorls sculptured with narrow, sharp, nearly straight,
longitudinal ribs of which there are nine on each of the last two
whorls; interspaces wider, concave; entire surface marked by
weak, incised, microscopic spiral lines which cross both interspaces
and ribs, cutting the crests of the latter; outer lip broken
away; inner lip smooth. Length of shell 14.50, greatest width
5.25 mm.

This species is of the general type of Dr. Dall’s C. ¢e7-
minula from the Pliocene of Florida.

Gabb’s C. heptagona is characterized by its seven promi-
nent ribs.

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao.

Genus GryPpHostoma Gabb

Glyphostoma dentifera Gabb

Plate 9, Figure 16
Glyphostoma dentifera Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p.
270, pl. 11, fig. 4, 1872.
Glyphostoma dentifera Gabb. Trans. Amer. Phil. Soc., vol. 15, p. 210,
1873.
The shell figured is a metatype of Gabb’s. This species is
the genotype of Glyphostoma.

Glyphostoma golfoyaquensts, Ni. Sp.
Plate 9, Figure 17

Shell very slender and graceful; whorls ten, the first three
nuclear, of these the first two are smooth and convex, the third
very sharply carinate; post-nuclear whorls seven, the first two
carinate, the remainder gently convex; suture linear; sub-sutural
channel marked with extremely fine spiral strize and coarse, con-
spicuous, raised arcuate growth-lines; whorls below the sub-su-

62 BULLETIN 29 226

tural channel ornamented with rounded, longitudinal ribs with
narrower interspaces, the ribs number thirteen or fourteen on
the last two whorls; on the last whorl they tend to fade out and
end in a single strong varix behind the outer lip; but additional
ribs are intercalated, extending from the convexity of the body
down towards the canal; spiral sculpture of uniform threads (four
or five on the penultimate whorl) which cross ribs, interspaces,
and varix, and extend to the base of the canal, but are replaced
in the sub-sutural channel by the much finer striz; outer lip
with a thick external varix, margin thin, bearing within six min-
ute denticles and one large posterior denticle; inner lip with a
strong posterior denticle; columella with minute, sharp, trans-
verse plicee; sinus deep, narrow, sub-circular. Length 12, width
4.5 mm.
Locality. — (Exp’d ’16) Zone I, Rio Cana, near Caimito.

Genus CLATHURELLA Carpenter
Clathurella Vendryestana Dall
Plate 9, Figure 18

Shell very slenderly fusiform, whorls eight, the first two
smooth, the following slightly carinate, the third to the sixth
have longitudinal riblets, later whorls only finely cancellated;
lip thickened; sinus deep. Length 14, width 4.5 mm.

An exquisite shell described from Bowden and now found in
Santo Domingo.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Genus CANCELLARIA Lamarck
Cancellaria Barretti Guppy
Plate 10, Figure 1

Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 289, pl. 17, fig. 11, 1866.

Cancellaria reticulata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,
p. 236, 1873. Not C. reticulata Linné.

227 DOMINICAN FossILS—MAuURY 63

Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p. 520, 1876.

This is the preecursor of C. reticulata Linné, living in the
Antilles. Its fossil analogues are C. Conradiana Dall, Florida
Pliocene, and C. Dariena Toula, Gatun. Guppy’s type was a
Bowden shell.

Localities. — (Exp’d ’16) Bluffs 1, 2 and 3, Cercado de Mao.

Cancellaria Rowelli Dall

Plate 10, Figure 2
Cancellaria Rowelli Dall, Proc. U. S. Nat. Mus., vol. 19, no. IIIo, p.
307, pl. 20, fig. 1, 1896.
The type measured 25X13 mm. Its nearest ally is C. u-
ceolata Hinds, living on the west coast of Central America.
Collected by Rowell at Potrero, Rio Amina.

Cancellaria epistomifera Guppy
Plate 10, Figures 3, 4, 5

Cancellaria Mooret Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236,
1873. Not C. Mooret Guppy 1866.

Cancellaria epistomifera Guppy, Quart. Jour. Geol. Soc. London, vol.
32, p. 520, pl. 28, fig. 9, 1876.

Cf. Cancellaria dariena var. Toula, Jahrb. der K-K. Geol. Reichsans-
talt, Wien, vol. 58, p. 704, pl. 28, fig. I, 1908.

Cancellaria epistomifera Cossmann, Journ. de Conchyliologie, vol. 61,
PP- 53, 54, pl. 4, figs. 5, 6, 1913.

Our series is divisible into two sets: (1) Protoconch small,
first two whorls smooth, the third developing riblets slightly be-
fore or simultaneously with the spiral threads; post-nuclear spi-
tals strap-like; (2) Protoconch large, first two whorls smooth,
the third developing five to seven spiral threads, preceding the
riblets by a third of a volution; post-nuclear spirals sharp-edged.
Dr. Dall compared (1) with the type and pronounced it the true
epistomifera and suggested (2) might be a variety. Toula’s C.
dariena var. is very like C. epistomifera, but does not show the
characteristic spout of the outer lip. M.Cossmann reports a

64 BULLETIN 29 228

fragment of C. epistomifera from Martinique. The type locality
is Santo Domingo.

Localities. —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao;
Zone A, Rio Gurabo at Los Quemados.

Cancellavia levescens Guppy
Plate 10, Figure 6

Cancellaria levescens Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 289, pl. 17, fig. 12, 1866.
Cancellaria levescens Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239,
1873.
This species can be at once recognized by its characteristic
loss of cancellate sculpture on the body whorl. Our shells were
collected by Gabb in Santo Domingo.

Cancellaria Guppyt Gabb
Plate 10, Figures 7, 8

Cancellaria Guppyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236,
1873.

This species can be recognized: by its sub-globose form,
channeled suture, and fine cancellation. We have several of
Gabb’s metatypes with which our shell appears identical though
slightly larger and higher-spired.

Locality, — (Exp'd ’16) Biuff 1, Gores de Mao.

Cancellaria Hlarrisz, n. sp.
Plate 10, Figures 9, 10

Shell with eight whorls, the first two nuclear smooth, on
the third riblets and spirals appear; the latter increase from striz
to flat, narrow bands, on the last two whorls alternating with
finer secondary and sometimes tertiary spirals; on crossing the
ribs the spirals at the shoulder are nodulose and beautifully cor-
onate the whorls; the ribs number fourteen on the body whorl
but on earlier volutions are more numerous; columella tri-plicate,
the lowest fold bordering the anterior canal; outer lip fluted on

229 DOMINICAN FossILs-—-MAURY 65

the inner edge, lirate within. Length 30, of body whorl 22,
width £6 mm.

Our shells have a slight resemblance to the recent Oriental
C. laticosta Kuster.

This, the most beautiful of the Dominican Cancellarias, is
named in honor of Professor G. D. Harris.

Localities. — (Exp’d ’16) Zones H and I, Rio Cana at Cai-
mito.

Cancellaria ( Trigonostoma) gurabts, n. sp.
Plate 10, Figure 11

Cancellaria brevis Gabb, Trans. Amer. Phil. Soc., vol.15, p. 236, 1873.
Not C. brevis Sowerby, Proc. Zool. Soc., p. 52, 1832; Thesaurus
Conch is 215

Shell excavately shouldered, widely and deeply umbilicated;
whorls five, babylonic, the first two nuclear, smooth, glassy, the
apical small, the second enlarging rapidly; the three post-nuclear
whorls are cancellated by the intersection of numerous fine ribs
and rather strong spiral ridges usually alternating with thinner
spiral threads; in addition to the cancellate ornamentation, the
penultimate whorl bears three, and the ultimate four, narrow
varices somewhat more than twice as thick as the ribs; both
ribs, varices, and spirals extend over the strong shoulder carina
and across the excavated channel to the suture; they also extend
into the funnel-like umbilicus; aperture sub-triangular; outer lip
bordered externally by the fourth varix of the body whorl, the lip
shows within faint groovings corresponding to the external spiral
ridges; inner lip with two thread-like, distinct, rather distant
plications. Length 11, width 8 mm.

Locality. —(Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Cancellaria (Aphera) islacolonts, n. sp.

Plate 10, Figure 12, a, b

Cancellaria tessellata Gabb, Trans. Amer. Phil. Soc., vol. 15, p, 236,
1873. Not C. ¢essellata Sowerby, Proc. Zool. Soc., p. 51, 1832.

66 BULLETIN 29 230

Shell resembling the recent West Coast C. ¢essellata Sowerby;
whorls six, the first two small, smooth, nuclear; post-nuclear
whorls elegantly cancellated by the intersection of equal longitu-
dinal riblets and revolving ridges; outer lip crenate on the mar-
gin, with about fourteen strong liree within; entire inner lip over-
spread with a broad, margined callous plate; columella strongly
biplicate, the folds often grooved, callus more or less wrinkled.
Measurements: 14X7, 19X10 mm.

An exquisite and striking shell, abundant in the blue clays.

Localities. — (Exp’d ’16) Blufis 2 and 3 (abundant), Cer-
cado de Mao; Zone G, Rio Gurabo at Los Quemados; Zone I,
Rio Cana at Caimito.

Cancellaria (Narona) losquemadica, n. sp.
Plate 10, Figure 13

Shell with seven whorls, the first two smooth, glassy, nu-
clear, the apical small, the second swollen; five post-nuclear
whorls gently convex, abruptly truncate and squarely shouldered
posteriorly; longitudinal ornamentation of narrow, varix-like
ribs (eleven on each or the iast two whorls) extending from su-
ture to suture and intensifying the angulation of the whorls;
both the ribs and their interspaces are crossed by spiral threads,
ten on the penultimate and twenty on the ultimate whori; aper-
ture sub-ovate, rounded posteriorly, produced anteriorly into a
short canal which is continuous with the inner lip; the latter has
a thin callus through which the spirals of the body are seen;
columella with three plications, the two anterior proximate,
parallel, the posterior more remote, sub-parallel, weaker; umbil-
icus represented by a mere chink. Length 13, width 7 mm.

This shell has a slight resemblance to the Gatun C. decaptyx
Brown and Pilsbry, but is much more squarely shouldered, with
more numerous ribs, and a triplicate columella.

Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que-
mados.

231 DOMINICAN FOSSILS—MAURY 67

(B.) SUPER-FAMILY RHACHIGLOSSA

Genus OLIvA Bruguiére

Oliva cylindrica Sowerby
Plate 10, Figures 14, 14a

Oliva cylindrica Sowerby, Quart. Jour. Geol. Soc., vol. 6, p. 45, 1849.
Oliva reticularis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288, 1866,
Not reticularis Lamarck.
Oliva cylindrica Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873.
Oliva cylindrica Guppy, Quart. Jour. Geol. Joc., vol. 32, p. 526, 1876.
Oliva cylindrica Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1583, 1903.
Oliva cylindrica Cossmann, Journ. de Conchyliologie, vol. 61, p. 57,
pl. 5, figs. 2, 3, 1913.
A comparison of specimens shows our fossils to be very close
to the recent O. reticularis and O. litterata, but rather heavier,

larger and broader.

Guppy reported O. cylindrica from the Isthmus, Cumana,
Barbuda, Trinidad (Caroni Series); and Dall and Cossmann
from Bowden. The type was collected by Heneken in Santo
Domingo.

Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone G,
Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at
Caimito.

Oliva Cristobalcolont, n. sp.
Plate 10, Figure 15

Shell very slender, spire high, suture channeled; whorls
eight, the first three nuclear, the initial extremely small, the second
slightly larger, the third increasing suddenly; subsequent whorls
sloping evenly to the tapering body; inner lip with many short,
transverse, posterior plications and five or six longer anterior
folds. Length 32, width 11.5 mm.

This species is distinguished from our other Olives by its
very slender form, high spire, and extremely sloping shoulder.
It is much narrower and more tapering than young shells of O.
cylindrica, reticularis, or litterata.

68 BULLETIN 29 232

Localities. —(Exp’d ’16) Zones H and I, Rio Cana at
Caimito.
Oliva brevispira Gabb
Plate 10, Figures 16, 17
Oliva brevispira Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873.
Oliva Gtraudt Cossmann, Journ. de Conchyliologie, vol. 61, p. 56, pl.
5, figs. 4-8, 1913. Exclude synonymy.

We have a large series agreeing with our metatype of Gabb’s
O. brevispira and with Cossmann’s figures of O. Gzraudz from
Martinique. The latter only appears a trifle broader shouldered
than the Dominican shells.

O. brevispiva has a characteristic short spire; round, glassy,
button-like protoconch; and inner lip with fifteen to sixteen
plications.

Localities. —(Exp’d ’16) Bluffs 2 and 3, Cercado de Mao
(very abundant); Zone G, Rio Gurabo at Los Quemados; Zones
H and I, Rio Cana at Caimito (abundant).

Genus OLIVELLA Swainson
Olivella muticoides Gabb

Plate 11, Figure 1

Oliva muticoides Gabb, Trans. Amer. Phil. Soc., vol. 315, p. 215, 1873.
Olivella nutica variety muticoides Dall, Trans. Wagner Inst. Sci., vol.

3, pt. I, p. 45, 1890.

This species is closely akin to the Miocene—Recent O. mu-
tica Say, which is living on the Monte Cristi beach. It is also
near to O. Boussaci Cossmann, from Martinique. Gabb’s spe-
cies has never been figured, but we have metatypes for compari-
son. The shell has not been found outside of Santo Domingo.

Localities. — (Exp’d ’16) Zone G, Rio Gurabo at Los Que-
mados; Zone H, Rio Cana at Caimito.

Olivella muticotdes variety canaliculata Gabb
Plate 11, Figure 2
Oliva canaliculata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873.

233 DOMINICAN FossILS—MAuRy 69

This shell intergrades with O. muticozdes, but our seven meta-
types from Gabb show it is typically slightly broader, with a
lower, more deeply channeled spire. It measures about 167
mm. O. canaliculata has never been figured heretofore. It has
not been reported except from Santo Domingo.

Locality. — (EHxp’d ’16) Bluff 2, Cercado de Mao.

Olivella indivisa Guppy
Plate 11, Figure 3

Oliva oryza Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873. Not

oryza Lamarck.

Olivella indivisa Guppy, Proc. U. .S. Nat. Museum, No. I1I0, vol. 19,

p- 308, pl. 30, fig. 10, 1896.

Our Dominican shells appear slightly more convex than
Guppy’s Bowden type, but otherwise coincide with his figure of
O. tndivisa. This shell is the preecursor of the recent O. oryza
(=nxzvea Gmelin).

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Ex-
tremely abundant).

Olivella Sanctt-Dominici, n. sp.

Plate 11, Figure 4

Shell elongate-ovate, highly polished, spire short, blunt;
whorls about four, the apical button-like, the second nearly cov-
ered by the third; last whorl very cylindrical; columellar callus,
thin, anterior plications two, distinct, followed by a number of
delicate transverse strie. Length 12, width 5 mm.

This species appears to be the ancestor of O.7aspidea Gmelin,
now living on the Monte Cristi beach, but the spire is higher
and the body more ventricose in the recent shell.

Dall cites a Bowden Odivella near jaspidea, possibly like
ours.

Locality. —(Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados.

70 BULLETIN 29 234

Genus MARGINELLA Lamarck

Marginella contformis Sowerby,
Plate 11, Figures 5, 5a

Margtinella contformis Sowerby, Quart. Jour. Geol. Soc. London, vot.
6, p. 44, 1849.

Marginella contformis Guppy, Quart, Jour. Geol. Soc., vol. 22, p. 288,
pl. 17, fig. 2, 1866.

Marginella contformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 221,
1873.

Marginella contformts Guppy, Quart. Jour. Geol. Soc. vol. 32, p. 528,
1876.

Vee contformis Guppy and Dall, Proc. U. S. Nat. Mus., vol.
19, NO. IIIO, p. 309, 1896.

? Marginella contformis Brown and Pilsbry, Proc. Acad. Nat. Sci.
Phila., p. 348, pl. 24, fig. 12, 1911.

This is the commonest Dominican Warginella. Large shells
measure 25 X13.5 mm. Guppy’s Cumana specimen is 7. cincta
Kiener, and that from the Caroni series, Trinidad, is Persicula
near obesa. It does, however, occur at Bowden and Gatun; but
Brown and Pilsbry’s figure of a variety also from Gatun is re-
markably unlike Guppy’s illustration of JZ. conzformzs.

The Dominican fossil is undoubtedly the ancestor of the
shorter and more cylindrical 47. guttata Dillwyn, living in the
West Indies.

Localities. —(Exp'd ’16) Bluff 1, Cercado de Mao; Zones
D and E, Rio Gurabo at Los Quemados.

Marginella Christineladde, n. sp,
Plate 11, Figure 6

Shell slender, elongate, four-whorled, smooth and _ polished,
spire very low; aperture nearly as long as the shell, narrow;
margin of outer lip thickened, smooth within; inner lip of adult
shells with a thin callus extending to the tip of the spire, colum-
ella with four plications, the three anterior oblique, the posterior
transverse, lying at the center of the inner lip. Length of largest
shell 19, width 9 mm.

235 DOMINICAN Fossirs—Maury 71

The nearest fossil ally is the larger, Pliocene, 17. limonensts
Dall, from Costa Rica. The recent analogue and probable de-
scendant is 47. oblonga Swainson, living off the Bahamas.

This species is named in honor of Mrs. Christine-Ladd
Franklin of New York City, Chairman of the Sarah Berliner Fel-
lowship Committee. It is a slight token of appreciation of her
confidence from the beginning in the writer, and in the success
of the Santo Domingo Expedition.

Locality. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que-
mados.

Marginella maoensis, n. sp.
Plate 11, Figure 7

Shell oblong-ovate, resembling J7. aficina Menke in form,
but about half as large, with a slightly more prominent spire,
and with the body-whorl convex, not medially contracted as in
apicina. Whorls four, suture obscure; aperture narrow, widen-
ing anteriorly and somewhat abruptly expanding posteriorly;
outer lip heavily thickened except anteriorly, closely and finely
crenulate within; columella with four plications, the two anter-
ior stronger, longer, oblique, the two posterior weaker, nearly
transverse. Color pattern consisting of two narrow, well-de-
fined dark-gray bands, one almost central, the other anterior,
thus dividing the body whorl into three subequal zones; no spots
are present. Length 10, width 6 mm.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Abun-
dant).

Marginella Sowerbyt Gabb

Marginella Sowerbyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 221,
1873.
Marginella Sowerbyt Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p. 528, pl. 28, fig. 1, 1876.
Characterized by a high spire and grooved columellar folds.
The shell measures 15 X11.50. Collected by Gabb in Santo Do-
mingo.

72 BULLETIN 29 236

Marginella hispaniolana, n. sp.

Plate 11, Figure 8

Shell small, short-biconic, smooth and polished, with four
whorls; suture indistinct, spire enameled; outer lip bordered by
a narrow, thick band, sharply lined off from the body whorl;
this band continues around the base of the shell, bordering and
reinforcing the canal; margin of outer lip strongly crenulate,
bearing about fifteen denticles; inner lip with four sharp, prom-
-inent folds, the two anterior being stronger, longer, and more
oblique, the two posterior shorter, nearly transverse. Length of
shell 8, aperture 6, greatest width 5 m. m.

This species is smaller and more squarely shouldered than
M. Sowerbyi. It recalls M. Newmanit Dall from the Tampa si-
lex bed.

Locality. —(Exp’d ’16) Zone G, Rio Gurabo at Los Que-
mados.

Marginella latissima Dall
Marginella lattsstma Dall, Proc. U. S. Nat. Mus., vol. 19, no. 1110,
Ppp. 308, 309, pl. 29, fig. 11, 1896.
Found by Gabb in the Costa Rica Pliocene and collected by
Bland in Santo Domingo.

Marginella amina Dall

. Marginella amina Dall, Proc. U. S. Nat. Mus., vol. 19, no. IrI0, p.
309, pl. 29, fig. 15, 1896.
Collected by Bland at Potrero, Rio Amina.

Marginella domingoensts Dall

Marginella domingoenses Dall, Proc. U. S. Nat. Mus., vol. 19, no.
IIIO, p. 310, 1896.
Collected on an island in Lake Henriquillo, southern Santo
Domingo, and also by Bland at Potrero, Rio Amina.

237 DoMINICAN FossiLs-—-MAuRY

“I
Ww

Marginella (Persicula) cercadensis, n. sp.
Plate 11, Figure 9

Shell small, ovate, Bulliform, spire depressed, enameled;
margin of outer lip thickened, sharply lined off from the body
whorl by a narrow sulcus; base of shell keeled, the keel being
continuous with the thickened margin of the outer lip, which is
minutely crenulate within; inner lip with three more prominent,
anterior plications and five weaker posterior to these, eight in
all, becoming obsolete posteriorly; the second , anterior pli-
cation is very strong, grooved on top, appearing double. The
body whorl is delicately and elegantly ornamented with fourteen
regular, revolving, chestnut-brown lines, not visible except with
alens. Length 6.5, width 4.25 mm.

This species is about the size and form of P. catenata Mont.
living at Monte Cristi, but the color markings are different and
the margin of the lip in that species is not so thickened nor has
the base the strong keel. The markings of our fossils are some-
what like those of P. multilincata and interrupta-lineata, but
both these are much larger. J/. odesa is still larger and more
convex, while chrysomelina is spotted, not lined nor keeled.

Locality. — (Exp’d’16) Bluff 3, Cercado de Mao. (Abun-
dant),

Genus Lyria Gray

Lyria pulchella Sowerby
Plate 11, Figures 10, loa

Voluta pulchella Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
46, pl. 9, fig. 4, 1849.

Voluta soror Sowerby,./d. p. 46.

Lyria pulchella Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873.

Voluta pulchella Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
528, 1876.

Lyria pulchella Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 84, pl.
4, fig. 3. 1890.

Lyria pulchella Dall, Bull. 90, U. S. Nat. Museum, p. 58, pl. 10, fig. rr.
IQI5.

74 BULLETIN 29 238

After examining the types, Guppy stated that Sowerby’s V.
sorory was undoubtedly synonymous with lV. pulchella.

We have a fine series of this handsome and abundant shell.
A single specimen has been found by Dall in the Tampa silex
beds.

Localities. —(Exp’d ’19) Bluff 1 (Abundant), Bluff 3, Cerca-
do de Mao; Zones A, B, D, E, F, Rio Gurabo at Los Quema-
dos; Rio Amina between Potrero and Hato Viejo.

Genus Mirra Lamarck

Mitra Henekent Sowerby
Plate 12, Figures 5, 5a

Mitra Henekeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
46, pl. 9, fig. 5, 1849.

Mitra Henekeni Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873.

Mitra Flenekent Guppy (in part), Quart. Jour. Geol. Soc. London, vol.
32, p. 528, 1876.

Sowerby’s type was immature and decollate. The adult
shell has ten whorls and measures 5615.5 mm. A character-
istic is the slight truncation of the whorls at the suture, The
young resemble 7. filosa.

We have a large series of this fine (/z¢va, which also occurs
in the Caroni Series, Trinidad, and at Bowden.

Localities. — (Exp’d ’16) Zones A, B, E, F, Rio Gurabo at
Los Quemados; Zones H and I, Rio Cana at Caimito; Bluff 1,
Cercado de Mao.

Mitra longa Gabb

Plate 11, Figures 11, Ila

Mitra longa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873.
Mitra longa Brown and Pilsbry, .Proc. Acad. Nat. Sci. Phila., p. 346,
jolls Aak, see, aie ey),
This shell is easily differentiated from M/. Henekent by its
slenderer form, greater number of columellar plications, and the
more reticulated aspect of the surface between the main revolv-

239 DOMINICAN FossILs—MAURY 75

ing ridges. A decollate shell measures 6313 mm. We have
metatypes from Gabb for comparison with our own specimens.
The species has been also found at Gatun.

Localities. —(Exp’d ’16) Bluff 1, Cercado de Mao; Zone I,
Rio Cana at Caimito.

Mitra quemadica, n. sp.

Plate 11, Figure 12

Shell fusiform, biconic, suture indistinctly bordered by a
sub-nodulose band; entire surface ornamented with revolving
cords, five on the penultimate, and fifteen on the ultimate
whorl; these cords are equidistant except just below the suture,
where the interspace is double the normal; they are crossed by
much weaker longitudinal growth-lines; aperture elliptical; col-
umella with three strong posterior folds and one faint anterior
one; margin of outer lip serrate. Length 28, width 11 mm.

In some respects this shell agrees with Gabb’s description of
his unfigured 7. rudis, but our shell is narrower and has many
instead of a few revolving spirals.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Quemados
(Rare).

Mitra titan Gabb

Plate 11, Figures 14, I4a

Mitra titan Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 220, 1873.
Mitra titan Dall, Trans. Wagner Inst. Sc., vol. 3, pt. I, p. 94, 1890;
pt. 2, p. 229, 1892.

This shell is strikingly like the Jacksonian Eocene 7. M/illing-
tont, but the latter is slenderer with a more elongate last whorl.
Doubtless the Dominican shell is the descendant of the earlier
species which lived in the Mississippi embayment. We have a
metatype of W/. tztan. The type measured 15245 mm. Gabb’s
M. symmetricus may be the young of ¢ztan.

76 BULLETIN 29 240

Mitra tortuosa Gabb
Plate 11, Figure 13

Mitra tortuosa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 220, 1873.

Shell with about twelve whorls, the first two nuclear; later
whorls sculptured by a dozen sharp ribs extending from suture
to suture, with concave interspaces marked by spiral incised
lines. The shell measures 28X10mm. We have several meta-
types for comparison.

Locality. —(Exp’d’16) Zone E, Rio Gurabo at Los Que-
mados.

Mitra Berlineri, n. sp.

Piate 11, Figures 15, 15a

Shell large, solid, typically mitriform, spire elevated; slightly
less in length than the aperture; whorls seven and a half, the
first two smooth, the third and all the subsequent volutions
sculptured by many sub-equal, sub-equidistant, somewhat wavy
and irregular alternating furrows and ridges; and by unequal,
irregular, broad, more or less obsolete, longitudinal plications
which extend from the suture to the base of the whorls; suture
distinct with a rather ill-defined sub-sutural band; aperture large,
not contracted anteriorly. Columella encrusted with a thick
callus, and bearing four strong plications; canal nearly straight.
Length of shell 83, width 24 mm.

This large Mitra rivals MW. titan in size, but is unlike any
recent or fossil species from the southeastern coast of America or
from the Antilles.

I take the greatest pleasure in naming this splendid Mztra
in honor of Mr. Emile Berliner, of Washington. D. C., asa
slight token of appreciation of his generous gift of the Sarah
Berliner Foundation, which has made this work possible.

Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao,

Mitra (Strigatella?) perturbatrix, n. sp.
Plate 14, Figures 1, 2
Shell slender, somewhat Columbelliform, spire a trifle shorter

241 DoMINICAN Fossits—MAuURY 7

than the aperture; suture distinct; whorls eight, the first two
smooth, nuclear; post-nuclear whorls slightly convex, ornament-
ed with weak, equidistant longitudinal plications, about twenty
on each of the last two whorls; the plications are strongest over
the convex portion of the volutions and fade out near the su-
tures; aperture narrowly elliptical, inner lip with a callus; colum-
ella with three sharp anterior and two weaker posterior plications;
outer lip thickened with a stout, marginated external band,
marked by an internal posterior Strombinoid notch and showing
traces of obsolescent crenulations within, not lirate. Length of
shell 20, greatest width 8.5 mm.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Genus PLocHELZA Gabb
Plochelea crasstlabra Gabb
Plate 14, Figure 3

Plochele@a crassilabra Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p.
PAp/e Ol, wae, sober, Ky, ksh.

Plochel@a crassilabrum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 216,
1873.

Shell Oliva-form, tapering anteriorly, spire low, suture ob-
solete, whorls about eight; aperture narrow; inner lip crossed by
about six slightly oblique, weak, linear plications; outer lip
much thickened at its center; columella recurved, sinus deep,
oblique. Length of shell 35, greatest width 17 mm.

The above description is of a metatype from Santo Domin-
go. This species is the genotype of Plochelea.

Genus TURRICULA Klein
Turricula (Costellaria) Bullennewtont, n. sp.
Plate 12, Figures 6, 6a

Shell elongate, turreted, coronated; whorls eight, each or-
namented by nine sharp-edged, longitudinal riblets, terminating
at the shoulder in spinose tubercles, not extending to the suture,

78 BULLETIN 29 242

coronating the shoulder; surface covered with close, coarse, even
spiral threads; aperture narrow, outer lip sharp, lirate far within;
inner lip with a light callus, columella with two distinct, slightly
oblique plications. Length of shell 13, greatest width 5.25 mm.

This interesting shell is apparently nearest akin to such
forms as C. cadaverosa Reeve and C. exasperata Gmelin, living
in the Polynesian and Red Sea regions. The whole genus now
is characteristically Polynesian; but our shells so resemble spe-
cimens of C. cadaverosa from the Philippines that there can be
no doubt of their belonging to the same genus.

An allied genus is Lapparia Conrad, represented by L. du-
mosa in the Jacksonian Eocene of Mississippi.

I take great pleasure in naming this species in honor of Dr.
R. Bullen Newton of the British Museum.

Localities. —(Exp’d ’16) Zones D and E, Rio Gurabo at
Los Quemados.

Genus Fusus Lamarck

Fusus Henekeni Sowerby
Plate 12, Figure 1

Fusus Henekeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
49, 1849.

Fusus Henekenit Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 204, 1873.

Fusus Henekeni Guppy, Geol. Mag. London. p. 439, 1874; Quart. Jour.
Geol. Soc. London, vol. 32, p. 524, pl. 28, fig. 6 (type), fig. 2 (var-
iety Hattensts), 1876.

Fusus Henekeri Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584,
1903.

Fusus Henekenit Grabau, Smithsonian Misc. Coll., vol. 44, no. 1417, p.
19, T904.

This fine species is characterized by its convex whorls with
rounded ribs (nine on the body whorl), and primary, secondary
and tertiary spirals. Our largest shell measures 90X24 mm.
Guppy has given an excellent figure of Sowerby’s type, collected
by Heneken. The species also occurs at Bowden.

Professor Grabau has noted the strong resemblance of /.

243 DOMINICAN Fossirs—MaAurRy 79

Henekent to F. eucosmium Dall, living in the Antilles. Doubt-
less our fossil is the ancestor of this more slender, recent shell.

Localities. — (Exp’d’16) Bluffs 1 and 3, Cercado de Mao;
Zones A and B, Rio Gurabo at Los Quemados; Zone H, Rio
Cana at Caimito.

Fusus Henekeni variety hattensis Sowerby
Plate 12, Figure 2

Fusus Haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.

49, 1849.
Fusus HHaitensis (2?) Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 204,

1873.

Fusus eee Guppy, Geol. Mag. London, p. 439, 1874.

Fusus Henekeni variety haitenses Guppy, Quart. Jour. Geol. Soc. Lon-
don, vol. 32, p. 524, pl. 28, fig. 2, 1876.

Fusus hattensts Grabau, Smithsonian Misc. Coll., vol. 44, no. 1417, p.
20, 1904.

Shell resembling /. Henekent and grading into that species,
but differing as follows: —(1) The whorls are angulated, cari-
nated, and flattened posteriorly; (2) the ribs do not continue to
the suture; (3) the spirals are more distant, not crowded; (4)
the ribs often become obsolete on the later whorls. This accel-
erated gerontism appears to be an individual characteristic.

Localities. — (Exp’d’16) Zones A, B, D, Rio Gurabo at
Los Quemados; Bluff 3, Cereado de Mao; Zone I, Rio Cana at
Caimito.

Fusus Hlenekent variety Veatcht, n. var.

Plate 12, Figure 3

Shell resembling 7. Henekenz, but differing in the following
respects: — (1) The structure of the shell is much lighter so that
a specimen of equal size is much less ponderous and thinner; (2)
the spirals are less crowded and less sharply ridged; (3) the ear-
lier whorls have about eight rounded, longitudinal ribs to a volu-
tion, but they begin to fade out on the third whorl from the
last; (4) the last two whorls are without ribs, are ventricose, not

Printed March 19, 1917

80 BULLETIN 29 244

carinated, slightly channeled beneath the suture; (5) inner lip
with a mere wash of callus, not rugose except posteriorly,,where
the spirals of the body whorl show through the Maa callus.
Length 88, width 24 mm.

In general aspect /. Henekeni Veatchi recalls 7. longicau-
datus Bory, now living off Ceylon.

In F. Henekent the ribs persist, in Henekent hattenszs they
tend to become obsolete, in --. Henekent Veatcht this gerontic
character is greatly intensified.

This fine Fusus is named in honor of Mr. Arthur C. Veatch
of London, England, as a token of friendship, and appreciation
of his great assistance in this work.

Locality. — (Exp’d ’16) Zone H, Rio Cana at Caimito.

Genus FAscroLARIA Lamarck

Fasciolaria semtstriaia Sowerby

Plate 13, Figure 1

Fasciolaria semtstriata Sowerby, Quart. Jour. Geol. Soc. London, vol.
6, p. 49, 1849.

Fasciolaria intermedia Sowerby, /d. vol. 6, p. 49. 1849.

Fasciolaria semtstriata Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288,
pl. 16, fig. 12, 1866.

Fasciolaria semisiriata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 216,
1873.

Fasciolaria semistriata Guppy, Geol. Mag. London, p. 438, 1874.

Fasciolaria intermedia Guppy, Quart Jour Geol. Soc., vol. 32, p. 523,
1876.

Fasctolaria semtstriata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I-
pp. IOI, 102, 1890; pt. 6, p. 1583, 1903.

Sowerby compared this species to the recent Australian /.

Justformis Valenciennes, which it resembles in general form; but
its real affinities are with the West Indian /. fu/ifa Linné.
There seems no doubt that Guppy was correct in regarding
Sowerby’s /. intermedia as synonymous with F. semistriata.
Sowerby described /. ztermedia as six-whorled, the first smooth,

245 DomINIcAN FossiLs--MAuRY 81

papilliform, the second, third and fourth tuberculate, the rest
ventricose, smooth. This would apply to specimens of semzstrzata
but not to the zzzermedia of Gabb and others.

F. semistriata has also been reported from Bowden and
Auguilla.

Localities. — (Exp’d ’16) Bluff 1, Cereadode Mao (Abun-
dant); Zone G, Rio Gurabo at Los Quemados.

Fasciolavia Kempt Maury
Plate 12, lars 4

Fasciolaria intermedia Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 217,
1873. Not Fasciolaria intermedia Sowerby, Quart. Jour. Geol.
Soc. London, vol. 6, p. 49, 1849 (= F. semistriata Sowerby.)

Siphonalia Kempi Maury, Bull 21. Amer. Paleont., vol. 4, p. 138, pl. 5,

fig. 5, I910.

Fasciolaria intermedia Brown and Pilsbry, Proc. Acad. Nat. Sci.

Phila., p. 506, 1912. Not of Sowerby.

This species was incorrectly identified by Gabb as Sowerby’s
intermedia. Thetrue /. tntermedia has the whorls (after the
fourth ) smooth, while those of Gabb’s shell, as shown by our
figure, are tuderculate.

By accident a fragmentary shell was mixed with Chipola
material and erroneously described by the writer as a Szphonalia.

Fasciolaria Kempt is a small member of the /. gzgantea stock-
Its Gatun analogue is /. Gorgasiana Brown and Pilsbry. Our
specimens were collected by Gabb in Santo Domingo, and the
species is also found at Bowden.

Fasciolaria carminamaris, n. sp.
Plate 13, Figure 2

Shell large, very handsome, whorls convex, not carinate,
concavely flattened posteriorly; ornamented with thirteen
rounded tubercles on the shoulder, cut by an ill-defined revolving
sulcus so as to appear double. The center of the sulcus is
occupied by a granular thread; in addition there is a second,
anterior row of smaller rounded nodules lying close to the suture
of the following volution, and on the body whorl along the
continuation of the sutural line; the penultimate whorl bears

ce
iS)

BULLETIN 29 246

nineteen and the last whori twenty of these nodules; an ill-defined
third row of still smaller nodules borders the convex portion of the
body whorl. The entire shell is sculptured with numerous rather
irregular, interrupted, very granulose threads and ridges, more
or less alternating with weaker spirals; aperture medium; outer
lip strongly lirate within, the lire being linear not granulose;
inner lip with a callus thickest anteriorly; columella with one
very strong anterior plication, a weaker median, and a sugges-
tion of a third faint, posterior plication; canal rather long, nearly
straight. Length 93, width 40 mm.

Locaiviv, — (bh xpid) 16) — lui nr Cencadodey Wiaoy iiGx

single shell. )
Genus Latirus Montfort
Latirus infundibulum Gmelin
Plate 13, Figure 3 x
Latirus infundibulum Gmelin, Lamarck, Anim. sans Vert. (ed.
Desh.) vol. 9, p. 386: Reeve Conch. Icon., Turbinella, No. 3.
Latirus infundibulum Guppy, Quart. Jour. Geol. Soc. London, vol.
22, p. 288, 1866; Geol. Mag. London, p. 438, 1874.
Latirus infundibulum Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
DG, WIR:
Turbinellus (Latirus) infundibulum Guppy, Quart. Jour. Geol. Soc.
London, vol. 32, p. 523, 1876.
Latirus infundibulum Dall. Bull. 37, U. S. Nat. Mus., p. 112, 1889;
Trans. Wagner Inst. Sci. vol. 3, pt. 6, p. 1584, 1903.

A recent shell has but ten primary spirals on the convex
part of the body whorl while the fossil has sixteen; the ribs are
equal in number. The fossil measures 55x18. The recent
57X19 mm.

A larger series might show that the ancestral form should
have a distinctive name, varietal or specific. If so, guvabensis
would be appropriate.

This species occurs at Bowden, and in the Caroni Series,
Trinidad. The recent form is living in rather deep water from
the Tortugas to Santa Lucia.

Localities.—(Exp’d ’16)—Zones A, B, E, Rio Gurabo at
Los Quemados.

247 DOMINICAN FossILsS—Maury 83

Latirus fusiformts Gabb
Plate 13, Figure 4
Latirus fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
DiGi, Isy/er,
We have a number of specimens of a Latirus agreeing with
Gabb’s description of this unfigured species.
Localities —(Exp’d ’16) Zone D, Rio Gurabo at Los
Quemados; Bluff 2, Cercado de Mao.
Latirus extlis Gabb
Plate 14, Figure 4
Latirus exilis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 217, 1873.
Our shell corresponds exactly with Gabb’s description of
this striking species, marked by the small aperture and canal
twisting to the right upon the pillar.
ME Ocaliny ex UC Nao) Zone B, Rio Gurabo at Los
Quemados.

Genus Xancus Bolten
Xancus validus Sowerby
Plate 13, Figure 5 2
Turbinellus validus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
Pp. 50, 1849.
Turbinella valida Gabb, Trans. Amer. Phil. Soc. 15, p. 218, 1873.
Turbinellus validus Guppy, Geol. Mag. London, p. 438, 1874; Quart.
Jour. Geol. Soc. London, vol. 32, p. 523, 1876.
Turbinella scolymus Tryon (in part) Manual Conch, vol. 4. p. 70,
1882. Not the recent shell.
Turbinella validus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p.

99, I8go.
Turbinella scolymus Dall(in part) Trans. Wagner, Inst. Sci., vol. 3,

Dies IL [Do Oyy Utsie(on

The smoother species X. Wilsonz, from the Vicksburg is the
ancestor of X. validus, while the recent X. scolymus is its
descendant. We have fine shells of validus that Gabb collected
in Santo Domingo. Guppy reported it from the Caroni Series,
Trinidad.

Xancus procvoideus, n. sp.
Plate 14, Figure 18
Turbinella ovoidea Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218

84 BULLETIN 29 248

1873. Not 7. ovoidea Kiener, Reeve Icon., fig. 23.

Turbinellus ovoideus Guppy, Geol. Mag., p. 438, 1874 (in part;) Quart.
Jour. Geol. Soc. London, vol. 32, p. 523, 1876.

Turbinella ovoidea Tryon (in part,) Man. Conch. vol. 4, p. 70, 1882.
Not the recent shell.

Our recent shells of X. ovotdea collected by the Hartt expe-
dition at Bahia, Brazil, show the spire is spirally striate, zof
costate. In the fossils the spire is strongly tuberculately costate for
about five whorls,and the three columellar plications are decidedly
heavier. Length 178, width 71 mm.

We collected a number of specimens and have also some
very fine ones sent by Gabb.

Localities. —(Exp’d ’16)—Blufis 1 and 3, Cercado de Mao.

Genus Vasum Bolten

Vasum hattense Sowerby
Plate 13, Figure 6
Turbinellus Haitensis Sowerby, Quart. Jour. Geol. Soc. London. vol.
6, p. 50, 1849.
Vasum Haitensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218, 1873.
Turbinellus Haitensis Guppy, Geol. Mag. London, p. 438, 1874.
Turbinelius Haitensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32,

[De Gag) jolly Aro), ies, 3, ISO,
Vasum haitense Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 100,
1890.

Specimens of Vasum engonatum Dall from the Chipola
River, Florida are very close to Guppy’s figure of Sowerby’s
type of V. haitense and to our Santo Domingo specimens. The
most striking differences are (1) the very squamose surface and
(2) the greater flatness of the later whorls in V. haztense.

Localities. — (Exp’d’16) Zones A, B, E, Rio Gurabo at
Los Quemados.

Vasum dominicense Gabb, variety gurabicum, n. var.
Plate 13, Figure 7
Vasum Dominicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218,
1873.

We have a number of specimens resembling V. dominicense
Gabb but with only three instead of four plications on the
columella. Dr. Dall kindly examined one and notes that it is

2490 DOMINICAN FosstLs—MAuURY 85

not represented in the National Museum, but is like Gabb’s
species except for the number of folds. Length of decollate shell

38, greatest width 24 mm.
Locality.—Zone D, Rio Gurabo at Los Quemados.

Genus MELONGENA Schumacher
Melongena consors Sowerby
Plate 14, Figure 5
Pyrula consors Sowerby, Quart. Jour. Geol. Soc., London, vol. 6, p. 49,

1849.
Melongena melongena Gabb (in part,) Trans. Amer. Phil. Soc., vol. 15,

p- 205, 1873. Not JZ. melongena Liuné, nor MW. patula Brod.

and Sby.

Pyrula melongena Guppy (in part) Geological Mag. London, p.
438, 1874.

Pyrula melongena Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
Pp. 523, 1876.

Melongena consors Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 121,
1890; pt. 6, p. 1584, 1903.

This is the higher spired, ancestral form of 7. melongena
which abounds on the Monte Cristi beach. The fossil shell is
also abundant. Our largest specimen measures 12585 mm.
It occurs also at Cumana, and Bowden.

Locality. —(Exp’d’16) Bluff 3, Cercado de Mao; Zone I,
Rio Cana at Caimito.

Genus MetuLta H. and A. Adams

Metula cancellata Gabb
Plate 14, Figure 19

Metula cancellata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 205, 1873.

Metula cancellata Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1584, 1903.

Closest akin to this shell is the Isthmian species 17. Gabdz
Brown and Pilsbry from the Gatun beds (Proc. Acad. Nat, Sci.
Phila) pe a5 re lea Sno An Oa TOT T.)

Dr. Dall reports Wetula cancellata from the Bowden beds,
Jamaica.

Wocaliy | xpd ito) blithe, Cercado de Macon ai CA
single specimen only of this exquisite shell.)

86 BULLETIN 29 250

Genus PHos Montfort
Phos Gabbit Dall
Plate 14, Figure 6
fhos Veraguensts Gabb (in part,) Trans, Amer. Phil. Soc., vol, 15, p-
212, 1873. Not FP. veraguensis Hinds.
Phos Gabbii Dall, Proc. U. S. Nat. Museum, vol. 19, No. 1110, pp.
310, 311, pl. 20, fig. 4, 1896.

Shell with twenty ribs on the ‘last whorl crossed by spiral
bands. Length 22, width 11 mm.

Dr. Dall has kindly compared our shells with his type which
Bland collected at Potrero, Rio Amina. The shell also is found
at Bowden.

Localities. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao.

Phos Moorei Guppy
Plate 14, Figures 7, 8
Phos Veraguensis Moore, Quart. Jour. Geol. Soc. London, vol. 6, p.
4oand 43, 1849.
Phos Mooret Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 290,
pl. 16. fig. 11, 1866.
Phos Veraguensis Gabb (in part) Trans. Amer. Phil. Soc., vol, 15, p.
212, 1873. Not P. veragwensis Hinds nor elegans Guppy.
Phos erectus Guppy, Geol. Mag., vol. 11, p. 410, pl. 16 fig. 1, 1874.
Phos Moorez Dall, Proc. U. S. Nat. Museum, vol. 19, No. IIIo, pp.
3210, 311, 1896.

This species is closely related to the recent West coast Phos
veraguensis as a comparison with specimens from Veragua proves.
P. gatunensis Toula appears to be the Isthmian analogue.

We are indebted to Dr. Dall for comparing our shells with
Guppy’s Bowden type of P. Mooret.

Localities. —(Exp’d ’16) Zones E and F, ( Conan Rio
Gurabo at Los Quemados. A shell from Bluff 1, Cercado de Mao
was identified by Dr. Dall as a mutation of this species.

Phos elegans Guppy
Plate 14, Figure Io
Phos elegans Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 290,
pl. 16, fig. 13, 1866.
Phos Veraguensis Gabb (in part) Trans. Amer. Phil. Soc., vol. 15, p’

251 DOMINICAN FossILts—MauRy 87

212. Not P. veraguensis Hinds.
Phos elegans Guppy, Quart. Jour. Geol. Soc. London, vol. 32. p. 524
1876. Exclude synonymy.

Dr. Dall most kindly compared our Dominican shells with
Guppy’s Bowden type, and pronounced them identical. Ours
appear slightly more shouldered, with a less convex body whorl,
and usually show a number of varix-like thickenings which
Guppy does not mention in his description. The shell was also
found by Guppy at Cumana.

Localities. — (Exp’d ’16) Zones D and E, Rio Gurabo at
Los Quemados (Common); Trail Hato Viejo to Potrero, Rio
Amina.

Phos Guppyi Gabb

Plate 14, Figure 9

Phos Guppyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873.

Phos Guppyi Guppy, Quart. Jour. Geol. Soc., London, vol. 32, p.
524, 1876.

Strongylocera Guppyi Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1584, 1903.

This shell is particularly interesting because of the changes
in sculpture it assumes at different stages of its early life. The
recent P. Beauzi Fischer, from Guadaloupe has some resem-
blance to our fossils, but the spiral sculpture is mtich weaker.

P. Guppyt is also found at Bowden.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los
Quemados (Rare).

Phos semtcostatus Gabb
Plate 14, Figures 11, 12
Phos semicostatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873.
P. semtcostatus has never heretofore been figured, but we
have a number of metatypes sent by Gabb which he collected in

Santo Domingo in the early Seventies.
The Isthmian analogue is the much larger shell, P. swbsemz-
costatus Brown and Pilsbry.

88 BULLETIN 29 252

Phos costatus Gabb.

Plate 14, Figures 13, 14
Phos costatus Gabb, Trans. Amer. Phil. Soc., vol. 15, pp. 212, 213, 1873.

We have a number of Gabb’s metatypes which have been
very helpful for comparison in identifying this unfigured species.
It belongs to the section Strongylocera Morch.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Phos fasciolatus Dall
Plate 14, Figures 15, 16

Phos (Strongylocera) fasciolatus Dall, Proc. U. S. Nat. Museum, vol.
NO}, INO) TI), JO, Aree, jolly iS}, rower, A, WeKaVy,

This species is extremely close to Phos costatus. The latter
is somewhat more robust; with fewer longitudinal ribs (9 against
Ii—14); with the spirals tending to become obsolete in the
interspaces; and with a smaller protoconch, the spirals not
appearing until after the fourth riblet.

The type of P. fasciolatus was collected by Bland at Potrero
Rio Amina.

Localities. — (Exp’d °16) Zones H. and I, Rio Cana at
Caimito (Abundant); Bluff 3, Cercado de Mao.

Phos metuloides Dall

Plate 14, Figure 17
Phos metuloides Dall, Proc, U.S! Nat. Mus:,) vol. 19; No: Tino, p- 310;
pl. 28, fig. 15, 1896.

The type was collected by Bland at Ponton, Santo Domingo.
The shell has also been found at Monkey Hill, Isthmus
of Panama.

Genus NASSARINA Dall
Nassarina Olssoni, n. sp.
Plate 21, Figure 2

Shell small, spindle-shaped, protoconch of only about one
whorl, smooth; post-embryonic whorls five, channeled anter-
iorly, the suture lying in the deep channel; sculpture of slightly
oblique, strong, longitudinal ribs and fainter spirals; a faint
spiral lies just anterior to the suture, then a band, and two

253 DoMINICAN Fossiis-—MAuRY 89

spirals follow on the whorls of the spire, but additional spirals
appear on the last whorl making about twelve in all; the ribs
extend from suture to suture but are deeply cut by the channel,
they number about eleven on the last whorl; aperture rather
narrow; outer lip somewhat thickened, with four internal denti-
cles, the posterior being the strongest; inner lip with a callus
and denticulate. Length 4.5, width 1.60 mm.

This species has the form of the recent VV. e/ypia but differs
strikingly in the deeply excavated suture, single embryonic volu-
tion, and adult sculpture.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Genus METULELLA Gabb

Metulella venusta Sowerby
Plate 15, Figures 26, 27

Columbella venusta Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
PP, 46, 47, pl. 9, fig. 6, 1849.
Metulella venusta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 206, 1873.
Columbella venusta Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
Pp. 526, 1876.
We have a number of Gabb’s specimens to compare with
ours. J. venusta has not been found outside of Santo Domingo.
Localities.—(Exp’d ’16) Bluff 1, CEES de Mao; Zone G,
Rio Gurabo at Los Quemados.

Metulella fusiformis Gabb
Plate 15, Figure 28

Metulella fusiformis Gabb, Proc. Acad. Nat. Sci. Phila., p. 270, pl.
Il, fig. 3, 1872.

Metulella fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
206, 1873.

We have a metatype from Santo Domingo sent by Gabb of
this rare shell. Itis the genotype of Metulella. Gabb thought

the affinities of the genus were with the Fusinae, Fischer with
Mangilia, and Dall with Nassarina.

go BULLETIN 29 254

Metulella Williamgabbi, n. sp.
Plate 15, Figure 29

Shell slenderly fusiform, whorls nine, the first two smooth,
nuclear, subsequent volutions ornamented by uniform, narrow,
longitudinal riblets of which there are twenty-five on the last
whorl; spiral striae faint, obsolescent; whorls flattened on the
sides; narrowly channelled above the suture; aperture elliptical;
inner lip with a callus bearing six transverse denticles; outer lip
with six distinct lirae and a seventh weaker one within the
aperture. Length of shell 17, of aperture 7, of spire 10; greatest
width 6 mm.

This species is very closely related to 17. fustformis, but can
be easily differentiated by its laterally flattened whorls, higher
spire, and obsolescent spirals. The surface is not regularly can-
cellate, nor are the whorls evenly and convexly rounded as in
M. fusiformis.

This interesting shell is named in honor of Professor Gabb
by whom it was collected in Santo Domingo over forty years
ago. It is the third species of his Dominican genus J/etulella.

Genus ALECTRION Montfort
Alectrion cercadensts, N. sp.
Plate 15, Figures 19, 20

Shell small, acute, with two and a half nuclear, and four and
a half post-nuclear whorls; longitudinal sculpture of small,
rounded, oblique ribs, twelve on the last whorl; the ribs often
become obsolete on the body whorl, spiral sculpture of raised
threads, nodular on crossing the ribs, four to six on each volu-
tion of the spire; on the body below the four spirals is an anter-
ior set of ten finer spirals; where the ribs become fainter, equal-
ling the spirals, a subcancellate ornamentation results, very char-
acteristic of this species; anterior sulcus deep; beak sculptured
by six spirals; outer lip with a stout external varix, denticulate
within and with long lire. Length 7.5, greatest width 5.25 mm.
A cancellate specimen with obsolete ribs on the last whorl meas-

255 DOMINICAN FOssILS—MAURY gI

ures 7.5X5 mm.

Gabb does not mention any Dominican Nassas. Guppy
identified those in Heneken’s collection with the European JV.
zncrassata,

Locality. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao.

Alectrion gurabensts, n. sp.
Plate 15, Figure 21

Nassa incrassaia Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
524, 1876. Not NV. zucrassata Muller,

Shell larger and stouter than the other two species, with
three smooth nuclear and six sculptured post-nuclear whorls,
convex, angulated and shouldered; suture wavy; longitudinal
sculpture of narrow, rounded ribs, eleven on the body whorl, al-
ternating with wider interspaces; spiral sculpture of three strong-
er, more widely spaced threads revolving about the middle of
each whorl of the spire with, on the penultimate volution, three
additional weaker threads on either side; on the last whorl there
are three or four threads posterior to the three primaries and
twelve anterior; anterior sulcus well defined; beak with eight
spirals; aperture round; outer lip with eight liree within; inner
lip with a posterior denticle; collumella rugose. Length 11,
6 mm.

This species resembles the recent A. zzcrassata Muller, rang-
ing from Iceland to the Mediterranean, but that has convex, not
angulated whorls, sixteen ribs, a larger callus, and thicker outer
lip. Our fossil also recalls 4. consensa Ravenel and possibly is
the same as the Bowden shell listed by Dall as Massa near
CONSENS.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Alectrion losquemadica, n. sp.
Plate 15, Figures 22, 23

Nassa ambigua Dall (in part), Trans. Wagner Inst. Sci., vol. 3, pt. 6,
p- 1584, 1903. Not JV. ambigua Montagu.

92 BULLETIN 29 ; 256

Shell closely resembling the recent A. ambigua, which
abounds on the beach at Monte Cristi; but differing in the fol-
lowing respects: — (1) The perfect fossil shells have an elevated,
conical protoconch of three to three and one-half smooth whorls,
the apical very small, the others gradually increasing; while the
recent shells all have a broad protoconch formed of one and one-
half to two smooth, flattened, and noticeably swollen whorls; (2)
the fossil shells have fourteen ribs on the last whorl, the recent
only twelve; (3) the fossil shells are smaller, our largest recent
shell measures 12 <7, but the largest fossil is only 8X5 mm.

I would think the fossil shell a dwarfed form of the recent
were it not for the striking difference in the protoconchs, sug-
gesting that they were derived from diverse ancestral stocks.

Dr. Dall listed 4. ambigua from Bowden, Jamaica, and from
Santo Domingo. Probably the Dominican, and perhaps the
Bowden forms are the same as ours.

The Gatun species 4. przambigua Brown and Pilsbry differs
from our shell widely in its spiral sculpture, the spirals being
spaced instead of closely crowded as in the Dominican shell,
which has twenty as against eight on the last whorl above the
sulcus, and seven against three on the penultimate whorl. The
Gatun species also has fewer nuclear volutions.

Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los
Quemados.

Genus Trrt1A Risso
Tritia golfoyaquensis, N. Sp.
Plate 15, Figures 24, 25

Shell with an elevated acute spire, suture distinct; whorls
seven, convex, surface ornamented with very regular, flat spiral
ridges (eight on the penultimate whorl) sub-cancellated by much
feebler longitudinal growth-lines; aperture wide, oval; anterior
sinus deep; outer lip sharply striate internally; inner lip with a
posterior callus; canal twisted. Length 17, width 9 mm.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

257 | DOMINICAN FossILs—MAuRY ” O%

Genus ECTRACHELIzZA Gabb
Ectracheliza truncata Gabb
Plate 15, Figures 1, 2
Ectracheliza truncata Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p.

271, pl. 9, fig. 2, 1872; Trans. Amer. Phil. Soc., vol. 15, p. 214,
1873.
Clea truncata Guppy, Quart. Jour. Geol. Soc. Loc. London, vol. 32, p.
524, pl. 29, fig. 6, 1876.
Lctracheliza trnncata Fischer, Man. de Conchyliologie, p. 637, 1887.
We have several metatypes collected by Gabb in Santo Do-
mingo. The apex is always eroded. Guppy erroneously referred
this species to the fluviatile, Malayan genus Clea H. and A.
Adams. J. truncata is the genotype and sole species of Gabb’s
E:ctracheliza.

Genus COLUMBELLA Lamarck

Subgenus JZeta Reeve
Meta islahispaniole, n. sp.
Plate 15, Figure 3

Shell small, coniform, spire very acute, suture distinct,
whorls eight, the first two smooth, nuclear, horn-colored or
glassy; first three post-nuclear whorls ornamented with longitu-
dinal riblets, eight or ten to each volution, giving them a coro-
nate aspect; these riblets then entirely fade out, so that the last
three whorls of the spire are smooth except for arcuate growth-
lines, and are channeled; body-whorl with a shoulder carina and
marked anteriorly by a varying number of incised lines, there
being on one shell only six near the base, but on the other
about twenty, extending almost to the center of the whorl; aper-
ture very narrow; inner lip with a thickening at the center;
outer lip thickened externally, the thickening slightly plicated
at the base, margin of lip thin, bearing within about fifteen
short liree; anterior sinus rounded, posterior U-shaped, situated
above the shoulder carina. Length 11, width 6 mm.

This rare shell appears to be referable to the genus Meza.

94 BULLETIN 29 258 -

Locality. — (Exp’d ’16)—Bluffi 3, Cercado de Mao.

Meta perplexabilis, n. sp.
Plate 15, Figures 4, 5

Shell with a slight general resemblance to 17. ehamella Du-
clos; entirely smooth except for faint growth striz and a vary-
ing number of incised lines and corresponding ridges on the an-
terior part of the body whorl; nuclear whorls two, swollen, glassy;
post-nuclear whorls five, slightly truncated at their posterior
margin, and so coiled as to project a trifle above the suture,
rendering it sub-canaliculate; over the last half of the body
whorl the suture droops then suddenly rises abruptly near the
aperture; inner lip of adult shells with a thin callus through
which the spiral threads of the body appear as rugosities; outer
lip with a slight external thickening, a thin margin and with about
sixteen liree within; but immature shells have a smooth
outer lip. Length of shell 13, greatest width 6 mm.

This perplexing shell seems nearest to the genus J/e/a. It
resembles a young Stvombus in general form.

Locality. — (Exp’d ’16)—Bluff 3, Cercado de Mao.

Subgenus Stvombina Moerch

Strombina hattensts Sowerby

Plate 15, Figure 18

Columbella haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p- 46, 1849.

Not Strombina Haitensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
221, 1873.

Columbella haitensis Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 526,
1876.

Anachts haitensis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584,
1903.

We are greatly indebted to Dr. R. Bullen Newton of the
British Museum for his kindness in sending us photographs of
this perplexing, unfigured species. Dr. Newton writes, ‘‘I have
critically examined Sowerby’s Columbella haztensis consisting of

259 DOMINICAN Fossits—MaAurRy 95

6 specimens and they all appeal to me as representing the genus
Strombina. To make this decision, however, more emphatic I
have had the group of shells photographed both natural size
and an enlargement of 4 diameters. * * *. These I think wili
fully convince you that Gabb was correct in referring the species
to Strombina.’’

But the Strombina referred by Gabb to haztenszs is ribbed
only on the spire, zever on the body (except when young) and
the shell is more ventricose and larger than the true haztensts.
I have called it pseadohattensts.

Our shell nearest hazfenszs is Strombina Bassi. This is of
the same ribbed type, but very much larger, measuring 11.50 X
5, against 7X 3.50 mm.

Anachis exilis Gabb, with which S. haztenszs has been con-
fused, is a true Azachis and entirely distinct.

Strombina pseudohattensts, n. sp.
Plate 15, Figures 12, 13

Strombina Hatitensits Gabb, Trans. Amer. Phil. Soc., vol. 15, p 221,
Not Columbella Haztensis Sowerby, 1849.
Flanaxsts crasstlabrum Guppy, Geol. Mag. London, p. 411, pl. 18, fig.
13, 1874. (Young specimen).

This differs from the true S. hazfenszs in the absence of rib-
bing from the body whorl of adult shells. The ribs become ob-
solete on the sixth or seventh and are never present on the eighth
whorl. A large shell measures 9X5 mm. We have specimens
from Gabb and many hundreds of our own of all ages.

Localities.—(Exp’d ’16)—Bluffs 3, Cercado de Mao. (Ex-
tremely abundant).

Strombina pseudohaitensis variety gurabensts, n. var.
Plate 15, Figure 14
Shell oblong-ovate, slender, high-spired, whorls eight, the
first three smooth, nuclear; riblets on the fourth oblique, on the

fifth vertical, on the sixth obsolete, the seventh and eighth are
smooth except for spiral impressed lines at the anterior third of

96 BULLETIN 29 260

the eighth; outer lip internally notched, with a thickened ridge,
but not yet denticulate. Length 8, width 4 mm.

This shell differs in its slenderer form from S. pseudo-
hattensts.

Locality.—Zone G, Rio Gurabo at Los Quemados. (Rare).

Strombina Basst, n. sp.
Plate 15, Figure 17

Shell with eight whorls, the first two nuclear, smooth, sub-
sequent whorls ornamented with close-set riblets, twenty-one on
the penultimate whorl, but only ten on the last whorl, since they
become obsolete on the latter half of that volution; spiral sculp-
ture of impressed revolving lines on the anterior half of the last
whorl; a stout varix lies just behind the outer lip and beside it
are two longitudinal wrinkles representing the obsolete riblets;
outer lip with a couple of denticles posterior to the notch and
about nine anterior; inner lip encrusted with callus; columella
rugose, with seven irregular, transverse plications; canal very
short, reflexed. Length 9, width 5 mm.

S. caribea has no riblets, S. pseudohattensis has riblets only

on the spire, S. Basst has riblets continuing until the last half of
the last whorl.

This species is named in honor of Mr. Albert M. Bass, Con-
suelo Estate, Macoris, Santo Domingo.

Localities. —(Exp’d’16) Zones D and E, Rio Gurabo at Los
Quemados.

Strombina Nanniebelle, n. sp.
Plate 15, Figures 15, 16

Shell ovate, spire acute, last volution inflated, suture dis-
tinct, whorls nine, the first three smooth, nuclear, the fourth
and fifth with fine, microscopic, close, longitudinal riblets, the
sixth, seventh and eighth entirely smooth, the ninth has about
a dozen spiral grooves anteriorly and one sub-sutural groove and
corresponding ridge; outer lip with a varix-like thickening, en-

DomINIcAN FossiILs-—MAURY 97

tirely smooth within; inner lip with a posterior dentate callosity,
and a thin plate of callus on the columella through which the
spiral striations are seen; aperture wide, elliptical. Length 13,
width 7 mm.

This species is named in honor of Miss Nannie Belle Maury
of Washington, D. C.

Localities.—(Exp’d ’16) Sandy clays, Zones H and I, Rio
Cano at Caimito. (Abundant and characteristic.)

Strvombina cyphonotus Pilsbry and Johnson

Plate 15, Figures 7, 8

Strombina gradata Gabb (in part), Trans. Amer. Phil. Soc,. vol. 15,
p. 221, 1873. Not Columbella gradata Guppy, Quart. Jour.
Geol. Soc. London, vol 22, p. 288, pl. 16, fig. 10, 1866.

Strombina Gabbiana Newcomb, Manuscript. Specimens Cornell Uni-
versity Museum, No. 19750 Newcomb Collection.

Strombina cyphonotus Pilsbry and Johnson, Proc. Acad. Nat. Sci.
Phila, py 353 pl 25; tgs) 6,.7, 19LT-

Nearly half a century ago Dr. Newcomb noted that this
species was not identical with Guppy’s Jamaican S. gvadata,
and gave the manuscript name S. Gabdiana (Newcomb Collec-
tion No. 19750). In late years Johnson and Pilsbry named the
Dominican shell S. cyphonotus.

Strombina prisma Pilsbry and Johnson
Plate 15, Figures 9, Io

Strombina gradata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,
p. 221, 1843. Not Columbella gradata Guppy, Quart. Jour.
Geol. Soc. London, vol. 22, p. 288, pl. 16, fig. 10, 1866.

Strombina prisma Pilsbry and Johnson. Proc. Acad. Nat. Sci. Phila.,
PP- 352, 353, pl. 15, figs. 9, Io, Tort.

The closest allies of S. prisma are S. cyphonotus and the
Gatun analogue, S. Lessepsiana Brown and Pilsbry. S. cancel-
fata Sowerby, living at Panama, has the same triangular last
whorl, and an extremely prominent dorsal hump, but the whorls
are carinated and coronated.

98 BULLETIN 29 262

Strombina caribea Gabb
Plate 15, Figure 6
Strombina carib@a Gabb, Trans. Amer. Phil. Soc. vol. 15, p. 221, 1873.
Astyris cartb@a Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6, p. 1584,
1903.

We have a metatype of this unfigured, greatly thickened
species, distinguished from the other Dominican Strombinas of
similar size by the single hump, the Ranella—tlike flattening, and
the entire absence of longitudinal ribs. The shell occurs also at
Bowden.

Strombina Neustrasenore, n. sp.

Plate 15, Figure 11

Shell with seven whorls, the first two smooth, nuclear, the
third with minute oblique riblets, the fourth and fifth with verti-
cal riblets, sixth and seventh volutions smooth; on the last
whorl behind the varix of the lip is an oblique hump and on the
left side of the body, opposite to the outer lip, are two longitud-
inal wrinkles; at the base of the shell are a number of impressed
spiral lines; outer lip with a conspicuous, thickened margin as-
cending to the suture, and with six internal denticles; inner
lip encrusted with callus; collumella rugose with six short, trans-
verse plications; canal short, sharply reflexed. Length 8, width
4.50 mm.

This pretty species is characterized by its curious thickened,
ascending outer lip.

Locality—(Exp'’d ’16) Zone G, Rio Gurabo at Los Quema-
dos. (Rare).

Strombina divilitus Harris and Maury, n. sp.
Plate 21, Figure 12
Strombina extlis Gabb, Jour. Acad. Nat. Sci. Phila., vol. 8, new ser. p.
356, pl. 46, fig. 41, 1874—1881. Not Strombina extl1s Gabb,
Trans. Amer. Phil. Soc. vol. 15, p. 222, 1873.

As noted under Anachis extlis Gabb, two very different
shells were named by Gabb Strombina exilis. The Santo Do-
mingo shell retains this name and the Pliocene species from Costa
Rico we have renamed divzlztus.

263 DOMINICAN Fossi1s—MAuRY “99

Subgenus NITIDELLA Swainson
Nitidella cibaotca, n. sp.
Plate 21, Figures 3, 4

Shell polished and shining, somewhat Strombiform, smooth
except for growth lines and for faint, obsolete longitudinal rib-
lets on the first two post-nuclear whorls; spire elevated, acute,
suture distinct, linear; nuclear whorls two, post nuclear six,
gently convex; apeture acute posteriorly, widening and truncate
anteriorly; inner lip with two small plications; outer lip much

-.thickened, its margin slightly inflected, bearing within about
ten denticles. Length 15, width 8 mm.

This apecies appears somewhat intermediate between JV.
nitida Lamarck and WV. laevigata Linné, both now living in the
West Indies.

Apparently this is the first \Vztzdella to be found inthe blue
clays of Santo Domingo. :

Localities —(Exp’d ’16) Sandy clays of Rio Cana at Cai-
mito; Zone D, Rio Gurabo at Los Quemados.

Subgenus ANacuis H. and A. Adams

Anachis extlis Gabb
Plate 21, Figure 5

Strombina extilis Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 222, 1873.

Not Strombina exilis Gabb. Jour. Acad. Nat. Sci. Phila., New Ser.,
vol. 8, p. 356, pl. 46, fig. 41, 1874—1881. — (.S. dztvilitus Harris and
Maury.)

Columbella exilis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
526, 1876. :

Anachis exilis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 135,
1890.

Anachts hattensis Dall, /d, pt. 6, p. 1584, 1903. Not haitensis Sow-
erby.

We have metatypes from Gabb and at least a thousand spec-
mens of our own of this pretty shell. It has been confused
with Strombina hattensis, but is perfectly valid and distinct. It

TOO BULLETIN 29 264

does not attain a length exceeding 5 mm.

This Anachis also occurs at Bowden.

Locality.—(Exp’d ’16).—Bluff 3, Cercado de Mao. (Ex-
tremely abundant.)

Subgenus Astyris H. and A. Adams

Astyris Debooyi, n. sp.
Plate 21, Figure 6

Shell with six whorls, the first two glassy, nuclear; the four
following porcellanous, entirely smooth except for six revolving,
impressed lines at the anterior part of the last whorl; collumella
with a thin callus through which the six striz encifcling the
base of the shell are visible; outer lip with six minute, micro-
scopic denticles, of which the two posterior are much the
stronger. Lengthof shell 5, of aperture 2, greatest width 2 mm.

This species has an extra whorl and slenderer form than
Say’s A. lunata. It is very close to acanthodes Dall, from the
Tampa silex beds, Florida.

This is the first true Astyris reported from the Santo Do-
mingo Tertiaries. It is dedicated to Mr. Theodoor de Booy, of
New York City, who is carrying on extensive researches in the
archeology of Santo Domingo.

Locality.—(Exp’d ’16)—Bluff 3, Cercado de Mao. (Rather
rare. )

Genus StroMBINELLA Dall

Strombinella acuformis Dall
Plate 21, Figure 7
Strombinella acuformts Dall, Proc. U. S. National Museum, vol. Io,
no. IIIO, p. 312, pl. 29, fig. 6, 1896.

There are but three specimens known of this rare and grace-
ful shell. We possess one that Gabb collected, and the other
two are in the National Museum. The type locality is Potrero,
Rio Amina.

Genus Typuis Montfort
Typhis alatus Sowerby
Typhis alatus Sowerby, Quart . Jour. Geol. Soc. London, vol. 6, p. 48,

265 DOMINICAN Fossiis—MAuRY IOI

pl. to, fig. 4, 1849.
Typhis alatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 203, 1873.
Typhis alatus Guppy, dem, vol. 32, p. 522, 1876.
This rare shell is characterized by the very thin, greatly ex-
panded, wing-like varix.
The type was collected by Heneken in Santo Domingo and
Guppy identified the shell from Bowden.

Typhis cercadicus, n. sp.
Plate 16, Figure 12

Shell small, each whorl with four varices and four tubes, the
tubes arising slightly behind the varices; on the last whorl are
faint indications of about six raised spiral lines; the whorls are
shouldered and the varices end at the shoulder; canal wide, cov-
ered, former position of canal indicated by a tubular process be-
side the canal. Length of shell 7, width 4.25 mm.

Locality.—Bluff 1, Cercado de Mao. (Very rare)

Genus Murex Linné

Murex messorius Sowerby
Plate 16, Figures 1, 2

M. messorius Sowerby, P. Z.S., p. 137, 1840.

MM. messorius Reeve, Conch, Icon. Murex fig. 90, 1845.

MM. recurvtrostris Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 201,

1873. Not W. recurvirostris Broderip.
M. messorius Dall. Trans. Wagner, Inst. Sci., vol. 3, pt. 1, p. 139,
1890.

WM. messorius, Dalland Simpson, U. S. Fish Comm. Bull. for 1goo,

vol. I, p. 407, I9ol.

M. messorius Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p.353,

IQIT.

This ancient static species is still living on the Monte Cristi
beach and has undergone no change since the deposition of the
blue clays. It is also found at Gatun.

Localities.— (Exp’d ’16) — Bluff 3, Cercado de Mao (very

abundant); Zone D, Rio Gurabo at Los Quemados.
Murex domingensis Sowerby

Plate 16, Figures 3, 4, 5, 6
Murex Domingensis Sowerby, Quart. Jour. Geol. Soc., vol. 6, p. 49,

TO) BULLETIN 29 266

pl. 10, fig. 5, 1849.

M. Domingensis Guppy, Quart. Jour., vol. 22, p. 288, 1866.

MM. Domingensits Gabb. Trans. Amer. Phil. Soc., vol. 15, p. 201,
1873.

iM. domingensis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.

1584, 1903.
M. vecurvirostris domingensis Brown and Pilsbry, Proc. Acad. Nat.

Sci. Phila., pp. 353—354, IQII.

Closely allied to this species is J7. yaguensis (antillarum
Gabb, name preoccupied). That typically is high spired, slender,
fusiform, while 47. domingensis has a broad ovate form, a low
spire, and three, instead of four or five intervarical ribs. But-we
have specimens of domingensts with the ribbing of yaguenszs.

M. domingensis is apparently the ancestor of the recent JZ.
antillarum Hinds (nodatus Reeve) which Tryon, I think erron-
eously, united with 7. recurivostris Broderip. M. anidllarum
Hinds is living on the beach at Monte Cristi. It has the form of
M. domingensis but the canal is longer and the spines much more
developed.

M. domingensis has been found at Bowden, Cumana, and the
Caroni Series of Trinidad (Guppy).

Localities—(Exp’d ’16) Large, typical shells with three in-
tervarical ribs, on the Guayabin to Mao road, Rio Cana; the mu-
tation, with four or five intervarical ribs, approaching 17. yaquen-
sts, Bluff 1, Cercado de Mao, and Zone F, Rio Gurabo. An ex-
traordinarily large specimen (Fig. 6), 74X42 mm, apparently
referable to 17. domingenis, Bluff 1, Cercado de Mao.

Murex yaquensis, n. sp.
Plate 16, Figure 7

M. antillarum Gabb, Trans. Amer. Phil. Soc.,vol. 15, p. 202, 1873.

Not WW. antillarum Winds, Proc. Zool. Soc. p. 126, 1843.

M. antillarum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.

FD TOT se :

As Gabb’s name is preoccupied by Hinds, the fossil requires
a new name and yaguensis seems appropriate.

This species intergrades with 17. domingensits. I have spec-
imens with the form of the latter and the ribbing of the former
species. Our typical shell is a metatype of Gabb’s antillarum.

- ee

267 DoMINICAN FossiIts—MaAuRy 103

Murex compactus Gabb
Plate 16, Figure 8
Murex ( Pteronotus) compactus Gabb, Trans. Amer. Phil. Soc., vol. 15,
p. 202, 1873.

MM. compactus Dall, Trans. Wagner, Inst., vol. 3, pt. 1. p.142. Not

textilis Gabb.

M. compactus has much the general aspect of M/. znucisus
Broderip living on the west coast, but the varices of the fossil
species are moreornate. Our shellis a metatype sent by Profes-
sor Gabb from Santo Domingo.

Murex (Phyllonotus) cornurectus Guppy
Plate 16, Figures 9, Io
MM. (Chicoreus) megacerus Gabb, Trans. Amer. Phil. Soc., vol, I5,
p. 202, 1873. Not W7. megacerus Sowerby.
IM. cornurectus Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 521,
pl. 28, fig. 4, 1876.

Our fossils fall into two groups:—(1) larger shells, identical
with those sent by Gabb as 17. megacerus, and exactly like speci-
mens from the Monte Cristi beach; (2) smaller shells identical
with Guppy’s 7. cornurectus, but also apparently the same as the
larger shells. Dr. Dall on being asked whether both should be re-
ferred to brevifrons, replied that it wouid be better to call them
cornurectus since, ‘‘the question of what brevifrons really is, needs
study. I feel there may be more than one species In the series
called brevifrons.’’

Localities. — (Exp’d ’16) Bluffs 1, 2, 3, Cercado de Mao
(abundant in 3); Zones D and F, Rio Gurabo at Los Quemados;
Zones H and I, Rio Cana at Caimito; Cerro Gordo to Mao road,
and Guayubin to Mao road.

Murex (Phyllonotus) prepauxillus, n. sp.
Plate 16, Figure 11
Shell with seven whorls, the first two smooth, nuclear, later
whorls with low crenate varices, six to a whorl, and three main,
crenate ridges revolving around the periphery. The uppermost
spiral of each trio carinates the whorl, and on crossing the vari-
ces forms short, hollow spines; aperture narrowly elliptical; canal

(ora)
Co

104 BULLETIN 29 2

open, somewhat reflexed; outer lip edged by the final fimbriated
varix and bearing within five well-marked denticles. Length 16,
width 7 mm.

This species is named fromits resemblance to 7. pauxillus
A. Adams, living on the northwest coast of Mexico at Mazatlan.
The fossil appears to be the ancestor of this shell.

Locality.— (Exp’d’16.) Zone D, Rio Gurabo at Los Que-
mados.

Genus AsPELLA Moerch _
Aspella scalariotdes Blainville
Plate 17, Figure 11
Murex scalarioides Blainville, Faune Frangaise, p. 131, pl. 5, figs.5,6,
1826.
Aspella ? scalarioides Dall, Bull. Mus. Comp. Zool. Harv. Coll., vol.
18, p. 208, 1889.
Aspella scalarioides Dall and Simpson, Bull. U.S. Fish Comm., vol-
20, pt. I, p. 410. I1g00.

Dr. Dall very kindly examined our specimen and decided
it was identical with the recent species living in the Antilles and
the Mediterranean.

Locality,—(Exp’d ’16) Zone D, Gurabo at Los Quemados.

Genus CymiAa Moerch
Cymia Flenekent, n. sp.
Plate 17, Figure I

Cuma tectum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 214, 1873. Not

of Kiener, Chemnitz, or Reeve.
Cuma tectum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 524,
1876.

Cymia Woodi Dall (in part) Trans. Wagner Inst. Sci., vol. 3, pt, 1,
Pp. 155, 1890.

Purpura (Cuma) Woodit Guppy, Trans, Canadian Inst., p. 390, 1909:

Cymia Woodit Maury, Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 15, p.
82, pl. 11, figs. 9, Io, 1912.

We have a number of specimens from Santo Domingo sent
by Professor Gabb as Cuma tectum. A comparison of these
with shells of the recent C. zectum collected by Dr. Newcomb on
the coast of Ecuador, leads one to the conclusion that the fossil
and recent shells are not identical. The fossils resemble those we

289 DoMINICAN FossILs--MAURY 105

obtained some years ago ina deposit of asphaltum in Trinidad.
At that time I followed Dr. Dall in identifying them with Gabb’s
C. Wood from the Shiloh marls, New Jersey. But the typical
shells are very different and it seems best to designate the Do-
minican and Trinidadian form by a distinctive name. For this
flenekent would seem appropriate, since Colonel Heneken first
collected fossil shells in Santo Domingo.
Genus CORALLIOPHILA Adams
Coralliophila mtocenica Guppy

Plate 18, Figure 6
Purpura miocenica Guppy, Geol. Mag. London, p. 4Io, pl. 16, fig. 9,

1874.
Coralliophila miocenica Dall, Trans. Wagner, Inst., vol. 3, pt. 6, p.

1584, 1903.

Cael e es tocenica has not been reported before outside of
Jamaica. Our Dominican shells resemble Guppy’s figure, but
the canalis somewhat shorter. Possibly they represent a variety
of the Jamaican species.

Localities. — (Exp’d ’16) Zone D, Rio Gurabo at Los
Quemados.

GUS OPER AMIE Vi wii NTOGLOS SA
Genus StmpuLum Klein
Simpulum pileare Lamarck
Triton pileare Lamarck, An, sans Vert., 7, p. 82, 1822.
Triton pileare Kiener, Icon. Coq., Viv. p. 15,pl. 7, fig. I.
Tritonium lineatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211,
1873.

Pinion pileare Dall, Trans. Wagner Inst., vol. 3, pt. I, page 161,
1890.

ee pilearis Dall and Simpson, Bull. U. S. Fish Comm., vol.
20, pt. I, p. 417, for 1900 (1902).

A fragment fromthe Rio Gurabo bluffs agrees in form and
sculpture with shells of S. pz/eave from the Monte Cristi beach,
but the fossil has dorsal humps recalling those of S. chlorostomum.
In the Newcomb collection, however, there are specimens of
pileare from the Philippines with similar humps. Gabb referred
his specimen to the related, perhaps identical shell, S. Aineatum

106 BULLETIN 29 270

from the Gallopagos Islands. .
Locality,— (Exp’d’16) Zone B, Rio Gurabo at Los Que-
mados.

Simpulum antillarum variety cercadicum, n. var.
Plate 17, Figure 2
Cf. Triton antillarum d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla
de Cuba, vol. 5, p. 248, 1845; Atlas pl. 23, fig. 20, 1855.

_ Shell intermediate between d’Orbigny’s two recent species,
S. antillarum and S. americanum, resembling the first in form
and the second in the callus and wrinkles of the inner lip.
Length 45, width 24mm. Tryon places axztllarum in the syn-
onymy of tuberosum Lamarck, of which we have specimens from
the Monte Cristi beach. It is quite a different shell with the por-
cellanous callus of a true Gutturnium, while our fossil shells are
referable to Szmpulum.

Locality.— (Exp’d’16) Bluff 3, Cercado de Mao.

Genus Lotorium Montfort

Lotorium praefemorale, n. sp.

Plate 17, Figure 3
Tritonium (Cymatium) femorale Gabb, Trans. Amer. Phil. Soc., vol.
15, p. 211, 1873. Not Zriton .femoralts Linné. .
Triton femoralis Guppy, Geol. Mag. London, p. 438, 1874. Not of
Linné.

Triton femoralis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.

522, 1866. Not of Linné.

Shell resembling the recent Z. femorate Linné, but differing in
the following respects:—(1) the spire is fusiform in the early stages,
the whorls not carinate, nor coronate. In femorale the spire is
fulguriform, coronated by a single row of tubercles; (2)the ape-
ture is ovate in the fossil, biangulate in the recent.

Our party collected the recent shell on the beach at Monte
Cristi. It is the descendant of the ancestral species fossilized in
the river bluffs.

Locality.—(Exp’d ’16) Zone F, Rio Gurabo at Los Quem-
ados.

—

27% DOMINICAN FossILsS—MAURY 107

Genus GuTtuRNIUM Adams

Gutturnium gracile variety gurabonicum, n. var.

Plate 17, Figure 10
Cf. Triton gracilis Reeve, Conch. Icon., fig. 58 a, b.

Shell resembling specimens of G. gracilis Reeve, living in
the Antilles, but with more prominent dorsal humps, shorter
canal, and surface much more finely reticulated. Length of de-
collate shell 23, width 12 mm.

This shell has some resemblance to Gabb’s Triton domin-
gensis (See Guppy’s figure, Quart. Jour. Geol. Soc., vol. 32, pl.
209, fig. 2) but that species has an elongate aperture and nearly
straight canal while ours has a round aperture and sharply twis-
ted canal.

Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema-
dos.

Genus DistorTRIX Link

Distortrix simillima Sowerby.

Plate 17, Figures 4, 5

Triton simillimus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p- 48, 1849.
Persona simillima Guppy, Quart. Jour. Geol. Soc. vol. 22, p. 288, pl.
0G), 10K) TAI. 1Ws\ole)
Distortia simillimus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212,
1873.
Persona simillima Guppy, Geol. Mag. London, p. 439, 1874: Quart.
Jour. Geol. Soc., vol. 32, p. 522, 1876.
Distortrix simillima Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1584, 1903.

Distorsio (Distortrix, Persona) gatunensis Toula, Jahrb. der K.—K.
Geol. Reichsanstalt Wien, vol. 58, p. 700, pl. 25, fig. 10, 1908.
Distorsio ga‘unensts Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila.,

Pp. 356, pl. 26, fig. 8, r9r1.

Toula’s type of D. gatunensis was an immature shell. Brown
and Pilsbry have figured a larger specimen which is so like some
of our Dominican shells that they seem entirely identical. The
more so, since a very fine shell we collected has the embryonic

108 BULLETIN 29 272

whorls perfectly preserved and they correspond to Brown’s and
Pilbry’s description of the protoconch of D. gatunensis.

Gabb notes the resemblance of the Dominican fossil Dzstor-
trix to the West Coast 2. constricta; but it is much more like
specimens from St. Thomas, W. I., labelled by Dr. Newcomb
videns Reeve.

Localities — (Exp’d ’16) Zones A, B, D, E, Rio Gurabo at
Los Quemados; Bluff 1, Cercado de Mao. (Very large and abun-
dant).

Genus Bursa Bolten

Bursa crassa Dillwyn
Plate 17, Figure 6, 7
Ranella crassa Dillwyn, Reeve, Icon., fig. 18, b.
Ranella crassa Guppy, Quart. Jour. Geol. Soc., London, vol. 22, p. 288,
pl. 18, fig. 9, 1866.
Bursa crassa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873.
Ranella crassa Guppy, Geol. Mag. London, p. 438, 1874; Quart. Jour.
Geol. Soc., vol. 32, p. 522, 1876.
Gyrineum crassum Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1584, 1903.
This species is still living on unchanged in the Antilles. It
occurs as a fossil at Bowden and in Santo Domingo.
Localities—(Exp’d ’16) Rio Cana, Guayubin to Mao road,
and Cerro Gordo to Mao road.

Bursa bufoniopsis, n. sp.
Plate 17, Figure 8

Shell somewhat flattened dorso-ventrally, whorls seven, the
first two nuclear, subsequent volutions with two lateral varices
each; varices rounded, their sculpture corresponding to the spiral
ornamentation of the shell but rather more pronounced; intervari-
cal tubercles three, often with a fourth, weaker tubercle on the
dorsal side of the last two whorls; body whorl on the dorsal sur-
face showing about nine spirals of which the uppermost is nodu-
lar, the second, third, fifth, seventh and ninth are single, beaded,
the fourth, sixth and eighth are paired, beaded. Aperture oval,
outer lip slightly reflexed, fluted, bearing nine interrupted denti-

273 DoMINICAN FossILsS—MAuRY 109

cles on its margin and far within, beyond the groove correspond-
ing to the varix, another row of seven smaller denticles. Inner
lip strongly and closely wrinkled its entire length, upper (poster-
ior) canal produced into a spout-like gutter, those of the last
three whorls persisting on opposite sides of the varices; lower
canal short, reflexed. Length 37, width 24 mm.

This shell resembles the recent, larger Oriental B. bujfonza
Lamarck in the characters of the aperture; abrupt reflexion of the
anterior canal and spout-like extension of the posterior canal. The
latter feature separates it from 2. 7home d’Orbigny.

Locality.— (Exp’d ’16) Zones B and D, Rio Gurabo at Los
Quemados.

Bursa Amphitrites, n. sp,
Plate 17, Figure 9

Shell with two varices to each whorl, the varices markedly
discontinuous, 77zton-like, resembling those of B. scrobiculator,
rounded, their sculpture conforming to the spiral structure of the
whorls; intervarical tubercles seven to nine, small, rounded;
whorls seven and a half convex, not flattened dorso - ventrally as
in B. bufontopsis, the first two and a half volutions are smooth,
nuclear, the third is decorated with two rows of minute tubercles
after which the beaded spiral threads appear. The spiral sculp-
ture of the last whorl consists of a row of bead-like nodules be-
neath the suture followed by a very fine beaded spiral thread, a
row of smaller nodules, a fine beaded thread, a row of nine rather
small, rounded, intervarical tubercles, followed by five nodular
spirals each alternating with a fine beaded thread. Aperture
oval; outer lip fluted, reflexed anteriorly, bearing within about
ten strong lirze some of which are double; inner lip extremely ru-
gose, wrinkled its entire length; upper (posterior) canal U-shaped,
apparently not much produced; anterior canal slightly reflexed.
Length 46, greatest width 27 mm.

This handsome species resembles the recent B. affinzs Brod-
erip, but-differsin the discontinuous varices; the nearly straight
columella; and more numerous intervarical tubercles.

IIO BULLETIN 29 274

Localities.—(Exp’d’16) Rio Amina, between Hato Viejo and
Potrero; Bluff 3, Cercado de Mao.

Genus Cassis Lamarck

Cassis sulcifera Sowerby
Plate 18, Figures I, 2, 3
Cassis sulcifera Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
47, pl. 10, fig. 1, 1849.
Cassis sulcifera Guppy, Quart. Jour., Geol. Soc., vol. 22, p. 286, 1866.
Cassis sulcifera Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 222, 1873.
Cassis sulcifera Guppy, Geol. Mag. London, p. 439, 1874; Quart. Jour.
Geol. Soc. London, vol. 32, p. 525, 1876.

Cassis sulcifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584,
1903; Proc. U.S. Nat. Mus., vol. 51, No. 21€2, p. 508, pl. 86, fig. 4,
1916.

This fine shell exhibitssuch diverse aspects in youth and in
old age as to appear, without a connecting series, two different
species. The descendant is C. fudbevosa Linné which we col-
lected on the Monte Cristi beach.

C. sulcifera has been found at Bowden and in the Flint River
Oligocene, Georgia. It is abundant in Santo Domingo.

Localities.— (Exp’d’16) Bluffs 1, 2, 3, Cercado de Mao;

Zones C, B, E, D, F, Rio Gurabo, at Los Quemados; Zones H
and I, Rio Cana at Caimito.

Subgenus PHALIUM Link

Phalium moniliferum Guppy
Plate 18, Figures 4, 5; Plate 19, Figure 1
Cassis montilifera Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 287, pl. 17, fig. 8, 1866.
Cassidea granulosa Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 222, 1873.
Not C. granulosa Bruguiére. Exclude synonymy.
Cassis reclusa Guppy, Geol. Mag. London, pp. 434, 439, 1874; Quart.
Jour. Geol. Soc., London, vol. 32, p. 525, 1876.
Cassis monilifera Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 525, 1876.
Cassis veclusa Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6. p. 1584,
1903.
There is no constant point of difference between C. monzli-
fera and C. reclusa and intermediate forms connect the two, but

275 DOMINICAN Foss11sS—MAURY mon

the extremes are unlike in aspect. I have designated our shells
which resemble the latteras P. monzliferum reclusum Guppy.
B oth forms occur at Bowden.

Localities —(Exp’d ’16) P. moniliferum, Zones H and I,
Rio Cana at Caimito; Zone G, Rio Gurabo at Los Quemados;
Bluff 3, Cerado de Mao; P. moniliferum reclusum, Bluff 3, Cer-
cado de Mao.

Subgenus Cypraicassis Stutchbury
Cyprecassis testiculus Linné
Cyprecassts testiculus Linné fide Gabb, Trans. Amer. Phil. Soe., vol.
i Dy AA e/a
‘We have a specimen from Gabb of this shell. The recent
range is from the Antilles to Hatteras.

Genus SconsiIa Gray
Sconsia levigata Sowerby

Plate 19, Figure 2
Cassidaria levigata Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,

P, 47; pl. 10, fig. 2, 1849.
Cassidaria sublevigaia Guppy, /dem, vol. 22, p. 287, pl, 27, fig. 9, 1866.
Cassidaria levigata Guppy, Geol. Mag. London, p. 439, 1874; Quart.
Jour. Geol. Soc., London, vol. 32, p. 525, 1876.
Sconsia levigata Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p.

356, I9QII.

We have alarge series of all ages and sizes of this fine
species, exhibiting all gradations from smooth to striate. Among
them are specimens exactly like Sowerby’s /evigata and Guppy’s
Jamaican sublevigata. Ihave vainly attempted to satisfactorily
separate out the latter as a variety.

Only three living species are known. Of these, S. barbu-
densis Higgins and Maratt, dredged off Barbuda, seems the near-
est to the fossil, and its possible descendant.

S. levigata occurs also at Gatun.

Localities. — (Exp’d ’16) Zones A, B,D, E, F, Rio Gura-
bo at Los Quemados; Bluff 1, Cercado de Mao. (Abundant.)

I12 BULLETIN 29 276

Genus Morum Bolten
Morum domingense Sowerby
Plate 18, Figures 7, 8

Oniscia Domingensis Sowerby, Quart. Jour. Geol. Soc. London, vol.
6, p. 47, pl. 10, fig. 3, 1849.

Cf, Ontscia harpula Conrad, Proc. Acad. Nat, Sci. Phila., p. 288, 1847,
Jour eps LION plsore thio nos

Morum Domingense Gabb, Trans. Amer. Phil. Soc., vol. 15,p. 223,

1873.
Oniscia domingensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32,

Pp. 525, 1876.
Lambidium domingense Dall, Trans. Wagner Inst., vol. 3, pt. 6, p.
1567, 1903.
Mortum domingense Dall, Bull. 90, U. S. Nat. Museum, p. 85, pl. 12.
fig. 28, 1915.

Conrad considered this species identical with his Ovzscza
harpula from the Vicksburg Oligocene; but.Gabb pronounced the
Santo Domingo species ‘‘very different.’’ We have no specimen
of the Vicksburg shell, but the description and figure are remark-
ably like the Dominician shells. The fossil seriesis 17. harpula,
chipolanum and domingense. The living representative is JZ.
Dennisoni Reeve, of the Lesser Antilles. AZ. domingenseis one
of the few species common to the Tampa silex beds and the
Santo Domingo blue clays.

Localities.—(Exp’d ’16)Bluff 1, Cercado de Mao; Zones D,
E, F, Rio Gurabo at Los Quemados.

Genus Dotium Lamarck

Subgenus MALEA Valenciennes
Malea camura Guppy
Plate 19, Figure 3

Malea camura Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.

287, pl. 17, fig. 9, 1866.
Malea ringens Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15,

P1223, 91873:
Maleacamura Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 525, 1876.
Malea camura Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584,

1903.

277 DoMINICAN Fossiis-—MAuRY 113

Malea camura Brown and Pilsbry. Proc. Acad. Nat. Sci. Phila., p.
356, IQII.

We have a large series, some of the younger shells being
very like Guppy’s immature, Jamaican type. The nearest living
ally and descendant is the West Coast M7. ringens Swainson.
Some of our shells with fewer spiral bands look like 7. promum,
but the characters of the aperture are more those of vimgens. A
mutation from Zone F, Rio Gurabo has closer ribs, about 20.

M. camura occurs at Bowden and is doubtfully reported
from Gatun.

Localities.—Zones F,G, Rio Gurabo at Los Quemados;
Bluffs 2 and 3 (Very abundant, all sizes), Cercado de Mao.

Malea, species indet.

A very large species, 110 mm. in diameter, nearly twice
as large as 17. camura, was found in Zone I, Rio Cana at Cai-
mito, but is too imperfect to describe.

Genus Pyruta Lamarck
Pyrula Pilsbryt Smith
Pyrula pilsbryt Smith, Proc. Acad. Nat. Sci. Phila., p. 213, fig., I 1907.

In this species the surface between the primary spirals is
flat, not concave asin P. carbasea Guppy from the Caroni Series,
Trinidad. The type locality of P. Pilsbryz is Bowden.

Locality.—(Exp’d ’16). Zone I, Rio Cana at Caimito.

Genus OvuLA Bruguiére
Ovula (Neostmnia) Wise-Woode, n. sp.
Plate 22, Figure 17

Shell resembling O. sfelta in outline, smooth except for fine,
wavy spirals near the extremities and delicate longitudinal
growth-lines; outer lip markedly arcuate, bordered by a callus
band; dorsal surface convex, with a slight but obvious hump
most apparent on the latter half of the body whorl; columella
with one very strong posterior plication; posterior canal sharply

TOA Ke! BULLETIN 29 278

reflexed. Length 14, width 6 mm.

This is the first Ovz/a ever found in the Dominican blue
clays.

Guppy’s Bowden O. zmmunitais slenderer and longer, the
lip rectilinear and no hump is mentioned. The recent O. wnzplr-
cata ismuch more delicate and slender but of the same group.

This rare and pretty shell is named in honor of Mrs. Henry
A. Wise-Wood of New York City.

Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (A single
shell).

Genus CyprR#A Linné
Cyprea FHenekent Sowerby
Plate 19, Figure 4
Cyprea Henikeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 45, pl. 9, fig. 3, 1849.
Cyprea Henekent Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873.
Cyprea Henekenit Guppy, Geol. Mag. London, p. 440, 1874; Quart.
Jour. Geol. Soc., vol. 32, p. 528, 1876.
Cyprea Henekeni Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 165,
1890.
Cyprea Henekeni Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., p.
356, IQII.

C. Hfenekeni appears to be the forerunner of C. mus now
living in the Atlantic Ocean and Mediterranien Sea. Typical
specimens are especially like the variety bzcornzs Sowerby in form.
The color marking of Henekenz, however, is different. Itcon-
sists of large light spots in a dark network, forming an open ret-
iculated design.

A variety of C. Henekenz occurs at Gatun.

Localities.—(Exp’ ’16) Bluff 1, Cercado de Mao; Zones E,
G, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at
Caimito.

Cyprea Nouelt, n. sp.
Plate 19, Figure 5

Shell large, exceedingly globose, showing the apex of the
spire, aperture somewhat curved; inner lip with about sixteen

279 DOMINICAN FossILs—MAURY II5

rather weak teeth, the strongest anterior; outer lip with about
twenty teeth, also strongest anteriorly and fading out posterior-
ly; upper margin of outer lip projecting; surface of shell entirely
smooth, with traces on the back of a color pattern of white spots
of varying size on a dark ground. Length of shell 60, width 44,
thickness 39 mm.

This splendid cowry is about the size of C. Henekenz, but
more globose and with no traces of dorsal tubercles, nor lateral
corrugations, with a different color pattern, and with the apex of
the spire visible.

I take the liberty of naming this species in honor of Arch-
bishop Nouel of Santo Domingo, whom I had the honor of meeting
in his beautiful and historic Cathedral.

Locality.— (Exp’d’16) Bluff 1, Cercado de Mao.

Cyprea spurca Linné

Plate 19, Figure 6

Cyprea spurca Linné, Syst. Nat., ed. 10, page 724, 1758.

Cyprea spurca Reeve, Conch. Icon., 3, pl. 14, fig. 68, 1845.

Cyprea spurca Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873.

Cyprea spurca Dall and Simpson, Bull. U. S. Fish Comm., vol. 20, pt.

I, page 420, 1900.

I can find no points of difference between the fossils and re-
cent specimens from the Antilles of C. spurca.

Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone
I, Rio Cana at Caimito. (Rare).

Cyprea spurcoides Gabb
Plate 19, Figures 7, 8,9

Cyprea spurcoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873.

Gabb remarks that the cremulations are more numerous on
the inner than the outer lip of sfurcozdes, but his metatypes show
the reverse. This unfigured species has not been reported out-
side of Santo Domingo.

Localities—(Exp’d ’16) Bluff 1, Cerado de Mao; Zone D,
Rio Gurabo at Los Quemados.

116 BULLETIN 29 280

Cyprea patrespatrig, n. sp.
Plate 19, Figure 10

Cyprea Isabella Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 235, 1873.

Not Cyprea Isabella Vinné, Syst. Nat., p. 1177, 1767.

We havea specimen of Gabb’s labelled by him C. J/sabella
Linné, from Santo Domingo. But on comparing it with a shell
of that species from Ceylon the resemblance is only one of general
type. The fossil is sub-cylindrical; aperture nearly straight,
very narrow; teeth numerous, fine, thirty-three on the outer lip.
Length 28, width 14, thickness 11 mm.

We collected some shells resembling Gabb’s. The specific
name proposed is in honor of the three liberators of the Domini-
can Republic.

Locality.—(Exp'd’ ’16) Bluff 1, Cercado de Mao.

Cyprea dominicensis ? Gabb
Plate 19, Figure 11
Cyprea Dominicensts Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236,
1873.

Judging from Gabb’s brief description our specimens are his
unfigured C. dominicensis.

Locality.— (Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Cyprea (Pustularia) Gabbiana Guppy
Plate 19, Figure 12

Pustularia nucleus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873.
Not of Linné. .

Cyprea pustulata Guppy, Geol. Mag. London, p. 440, 1874. Not of
Lamarck.

Cyprea Gabbiana Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
528-529, pl. 29, fig. 10, 1876.

Cyprea Gabbiana Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 1. p. 165,

1890.
This beautiful little Cyprve@a resembles the recent Oriental
C. nucleus. Itis very rare in Santo Domingo and has not been —

found elsewhere.
Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema-
dos.

281 DOMINICAN Fosstrs—MAuRY a9)

Genus Trivia Gray

Trivia globosa Gray
Plate I9, Figure 13,
Trivia globosa Gray, Sowerby’s Thesaurus, Cypreea, figs. 429, 431.
Trivia globosa Dall, Bull. 37 U. S. Nat. Mus., p 136, 1889; Trans. Wag-
ner Inst. Sci., vol. 3. pt. I, p. 168, 1890; Jd. pt. 6, p. 1584, 1903.

We have several specimens agreeing in form and size with
recent shells of 7: ¢/obosa but the furrow is not quite so deep
and the ribs are worn so as to appear double. This species is
living in the Antilles and is found as a fossil at Bowden.

Localities— (Exp’d ’16) Zone I, Rio Cana at Caimito.
(Rare).

Trivia tslahtspantoleg, n. sp.
Plate 19, Figure 14

Shell sub-pisiform, very ventricose, slightly produced and
notched anteriorly and with the lips, especially the outer, flaring
a trifle posteriorly, sharply sculptured with well defined ribs of
which there are about twenty-three on the outer and twenty on
the inner lip; dorsal surface evenly convex with only the faintest
suggestion of a sulcus over which the ribs continue without any
interruption, aperture narrow. Length of shell 7, breadth 5, alti-
tude 5 mrn.

This shell resembes 7. globosa but that species is smaller
and the dorsal furrow is sharply cut, extending almost to the ex-
tremities.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Very
rare. )
Trivia suffusa variety Sancti-Dominict, n; sp.
Plate 19, Figure 15,

Shell resembling 7. suffusa but more convex, slightly pro-
duced and truncate anteriorly; outer lip somewhat elevated above
the last whorl and sub-angulate posteriorly; ribs fine, 35 on the
outer margin of the outer lip and 25 on the inner lip; dorsal fur-
row very straight and sharp on one shell, less sharply defined on

Printed Mar. 31, 1917

118 BULLETIN 29 282

the other; aperture narrow widening very slightiy anteriorly.
Length 8, width 5.50, altitude 5 mm.

The fossils differ from 7. suffusa, now living in the Antilles
and fossil at Bowden, in their more convex form and narrower
and straighter aperture.

Our three species of 7vivia are the first ever found in the
Santo Domingo blue clays.

Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (Rare).

Genus ERATO Risso
Erato Maugerie variety domingensts, n. var.

Plate 21, Figure 8

Shell minutely ficiform, whorls three, suture indistinct, spire
very short, obtuse, last whorl very globose posteriorly, contracted
and slightly produced anteriorly; aperture linear, nearly as long
as the shell, margin of outer lip much thickened, minutely crenu-
lated within; inner lip perfectly smooth except for a longitudinal
ridge. Length4, width 3.25 mm. The species differs from £.
Maugeria, which we collected on the Monte Cristi beach and is
found as a fossil at Bowden, in the following respects:—it is
smaller, more contracted and produced anteriorly, the inner lip is
smooth and has the longitudinal ridge, while the inner lip of the
recent shell has no ridge but a dozen sharp denticles extending its
entire length.

Locality.

(Exp’d ’16,) Bluff 3, Cereado de Mao.

Genus StRomBus Linné
Strombus hattensts Sowerby
Plate 20, Figure 1

Stroinbus hattensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 48, pl. 9, fig. 7, 1849.

Strombus bituberculatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 233
1873. Not dituberculatws Lamarck.

Strombus haitensis Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521
1876.

This species differs from .S. détuberculatus, of which we found

beautiful shells on the Monte Cristi beach, in the following re-

233 DoMINICAN FossILS—MAURY

-
bs
Ne)

spects:—the recent has the lobe of the outer lip more produced,
the second row of spines much smaller and a third row is intro-
duced at the base. Evidently it isthe direct descendant of the
fossil. The latter also occurs at Bowden.

Localities —(Exp’d’16) Bluff 1, Cercado de Mao; Zones A,
HK, G, F, Rio Gurabo at Los Quemados.

Strombus bifrons, Sowerby
Plate 20, Figures 2, 3
Strombus bifrons Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 48, pl. 9, fig. 9, 1849.
Strombus bifrons Guppy, Quart. Jour., vol. 32, p. 287, 1866.
Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15,
Pp. 233, 1873. Not pugzlis Linné.
Strombus bifrons Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521, 1876.
Strombus bifrons Dall, Trans. Wagner Inst., vol. 3, pt. I, p. 176, 177,
1890; 7d. part 6, p. 1584, 1903.

Sowerby distinguished his unfigured S. ambiguus from bifrons
by the absence of rugations on the posterior part of the inner lip
of dzfrons. But this is not a constant character. Some of our
shells have five, three, none, yet evidently are the same species,
and closely resemble Sowerby’s figure of dz/rons.

This graceful shell is like the recent Oriental S. columba. It
has a slight resemblance to Toula’s S. gatunensis, but in that
species the spines on the shoulder are obsolete. Of Floridian fos-
sil species it seems nearest S. Aldricht Dall. Our fossil is also
found at Bowden.

Localities.—(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao;
Zones A, E, F, Rio Gurabo at Los Quemados; Zone H, Rio Cana
at Caimito.

Strombus proximus Sowerby
Plate 20, Figures 4, 5

Strombus proximus Sowerby, Quart. Jour. Geol. Soc. London, vol.

6, p- 48, pl. 9, fig. 8, 1849.
Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15, p.

233, 1873. Not pugzlis Linné. Exclude other synonyms.

Strombus proximus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521,

1876.

120 BULLETIN 29 284

Strombus pugilis Dall, (in part) Trans. Wagner Inst. Sci., vol. 3, pt. 1,
Pp. 177, 1890. Not pugzlis Linné

This shell has a general resemblance to S. gvacilior Sower-
by, living off Panama. The spirals may, asin the type, cover
the entire surface or be obsolete except on the spire. The last
whorl may be deeply sculptured with grooves and cords or al-
most smooth. The characters of the spire are the most contant
feature.

Localities —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao;
Zone EH, Rio Gurabo at Los Quemados; Zone I, Rio Cana at
Caimito.

Strombus pugiloides Guppy -
Plate 20, Figure 6

Strombus pugilis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 287, 1866.
Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol., 15, p.

233, 1873.
Strombus pugiloides Guppy, Geol. Mag. New. Ser. Decade 2, vol. 1,
P. 433, 1874.
Strombus pugilis Dall, (in part) Trans. Wagner Inst. Sci., vol. 3, pt. 1,
Pp. 177, 1890.

Shell resembling S. pugziis Linné, abundant on the Monte
Cristi beach, but the fossil is devoid of spines and smaller, meas
uring 60 X 36 against 83x52mm. The recent is the descendant
of S. pugzloides just as bttuberculatus is of hattensts.

_ Locality.—(Exp’d’16) Rio Cana on the Guayabin to Mao
road.

Strombus maoensis, n. sp.
Plate 21, Figure 1

Shell rather large, remaining whorls eight, the last five ail
tuberculate. On earlier whorls the tubercles aresmall, close-set
and over-run by spiral threads; they gradually increase in size
and diminish in number so that on the dorsal side of the last
whorl there are but three or four very strong, conspicuous spines,
and on the oral surface of the last whorl the spines are entirely
obsolete. The spiral sculpture on the body whorl consists -of

235 DoMINICAN FossiLs-—MAURY 121

more or less obsolete, wavy ridges tending to alternate with spiral
threads. Columella with a thick wash of callus, canal strongly
reflexed. Length 94, width 55 mm.

Our fossil resembles the recent S. (Monodactylus) gallus
Linné. But on comparing it with specimens of gad/us from Tor-
tola, the latter is seen to have a much narrower spire, with tuber-
cles absent from the two whorls preceding the last then reappear-
ing, and the body is strongly spirally sculptured.

Locality.—(Exp’d ’16) Bluff 1, Cercado de Mao.

Genus ORTHAULAX Gabb ©
Orthaulax itnornatus Gabb
Plate 21, Figure 11
Oy naulee inornalus Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p.
272, pl. 9, figs. 3, 4, 1872; Trans. Amer. Phil. Soc., vol. 15, p. 235,
1873.

Orthaulax tnornatus Guppy, Quart. Jour. Geol. Soc., London, vol. 32,
Pp. 520, 1876.

Orthaulax tnornatus Dall, Trans. Wagner Inst. Sci., vol 3, pt. I, p. 169,
1890: Bull. 90, U. S. Nat. Mus., p. 86, pl. 11, fig. 4, 1915.

The genus Orvthaulax occurs in Santo Domingo, Cuba, An-
tigua, Tampa silex beds, Bainbridge (Georgia), lower bed of
Alum Bluff, and the Chipola marls, Florida. It has not been
found in the Bowden beds.

Gabb’s species, O. zzornatus is the genotype described from

Santo Domingo. Dr. Dall has found it in the White Beach
limestone and the Tampa silex bed, Florida.

Genus CREPITACELLA Guppy

Crepitacella cepula Guppy

Plate 21, Figure 9

Melanopsis cepula Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.
580, pl. 26, fig. 14, 1866.

Crepitacella cepula Guppy, Geol. Mag. London, vol. 4, p. 500, 1867.

Dolophanes melanoides Gabb, Proc. Acad. Nat. Sci, Phila., vol. 24, p.
272 Pleo init 7) LO 2

122 BULLETIN 29 286

Dolophanes melanioides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235,
1873.

Crepitacella cepula Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
524, 1876.

Crepitacella cepula Guppy and Dall, Proc. U.S. Nat. Mus., vol. 19,
no. ILIO, p.-328, 1896.

Crepitacella cepula Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1585, 1903.

For this interesting shell Gabb created in 1873 the genus
Dolophanes. But Guppy in 1866 had described a similar shell
from Cumana as MWelanopsis cepula, for which the following year
he founded the genus Crepitacella. Guppy and Dall found the
Cumana and Dominican species identical.

The probable descendant is the deep sea C. Gabdz Dall,
which unlike its tropical ancestor lives in nearly freezing water
at a depth of 785 fathoms in sand and ooze.

Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone B,
Rio Gurabo at Los Quemados. (Rare).

Crepitacella cepula variety sptralistriata, n. var,
Plate 21, Figure Io

Shell resembling C. cepula Gabb, but with stronger sculp-
ture, longitudinal riblets closer, higher, more conspicuously coro-
nated on the shoulder angle; surface ornamented with fine, close
spiral threads. Length 15, width 6 mm.

Gabb found similar spirally striate specimens.

Locality. —(Exp’d’16) Zone B, Rio Gurabo at Los Que-
mados. (Rare).

Genus TRIFORIS Deshayes
Triforis Calypsonis, n. sp.
Plate 21, Figure 13

Shell of medium size with slightly curving sides; suture
deep; protoconch of about two whorls, each with two strong ad-
jacent spirals, crossed by many oblique riblets; post-nuclear

287 DOMINICAN FosstLs—MAuRY 123

whorls thirteen, the first five with two strong spirals cut into
coarse granules by the longitudinal ribs, on the following whorls
a third spiral appears between the twoand on the later whorls
becomes equally strong; the last volution has a peripheral spiral
and two less strongly beaded basal spirals; ribs straight, twenty-
one on the last whorl extending from the umbilical region across
the spirals to the suture, forming square pits between the spi-
rals and ribs; aperture large, round; outer lip thin, flaring,
with a trace of a posterior sinus; anterior canal tubular, closed.
Length 9.5, width 2.25 mm.

Genus CERITHIUM Adanson
Cerithium microlineatum Gabb
Plate 22, Figure 1

Cerithium microlineatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
236, 1873.
This unfigured species has heretofore only been recorded by
Gabb.
Localities. — (Exp’d ’16) Zone D (Abundant), Zone EH
(Rare), Rio Gurabo near Los Quemados.

Cerithium Russell, n. sp.

Plate 22, Figures 2, 3

Shell with many whorls carinated by a row of tubercles be-
neath the sub-sutural sulcus; upper whorls with two narrow,
well-defined varices, obsolete on the penultimate but represented
on the ultimate whorl by one large, irregularly rounded varix;
the first five whorls following the protoconch are ribbed, the
riblets then break up into a larger and a smaller row of tubercles
separated by the sub-sutural sulcus; entire surface of the shell
sculptured with narrow, spiral cords; inner lip with a thick cal-
lus and one posterior, elongated tooth; outer lip smooth within.
Length of decollate shell 44, width 16 mm.

This species is like C. microlineatum in size but distinguished
by its broader form and convex whorls carinated by the main

124 BULLETIN 29 288

row of tubercles. It has somewhat the aspect of C. atratum liv-
ing on the Monte Cristi beach.
Our shell is named in honor of Hon. W. W. Russell, M. P.>
BE. E., American Ambassador at Santo Domingo City, as a slight
recognition of his very kind interest in our expedition.
Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema-
dos.

Cerithium unisertale Sowerby
Plate 21, Figures 14, 15

Cerithium unisertale Sowerby, Quart. Jour, Geol. Soc. London, vol. 6,

p. 51, 1849.
Cerithium obesum Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,

Pees 7els7e:

Not Cerithium untiseriale Gabb, Jd. p. 237. 1873.

Cerithium uniseriale Guppy, Quart. Jour. Geol. Soc, London, vol. 32,
p. 519, pl. 20, fig. 4, 1876. (Figure of Sowerby’s type).

The true C. uniseriale Sowerby, based on Guppy’s figure of
the type, can always be recognized by its short, broad form,
sudden ascent of the body whorl near the aperture, and tubercu-
lated whorls. It has also been found at Cumana.

Localities. —(Exp’d’16) Zones B and D, Rio Gurabo at
Los Quemados; Bluff 2, Cercado de Mao.

Cerithium obesum Guppy
‘Plate 21, Figure 16

Cerithium obesum Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.

237, 1873.
Cerithium obesum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.

519, pl. 29, fig. 9, 1876.
Gabb’s C. obesum included C. uniseriale Sowerby (not Gabb)
and obesum Gabb. The species is here limited to Guppy’s re-
stricted sense.

Cerithium gurabense, n. sp.

Plate 22, Figures 4, 5
Cerithium unisertale Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 237,

1873.

289 DOMINICAN FossiL.s—MAuRY 125

Not Cerithium uniseriale Sowerby, Quart. Jour. Geol. Soc., vol. 6, p.
51, 1849.

Shell slender, high-spired; whorls ten, the first two smooth,
nuclear, following whorls with fine, granular, somewhat inter-
rupted spirals, and a row, sometimes doubled, of small pustules
beneath the suture; aperture narrowly ovate; inner lip with a
thick callus terminating in an elongated, posterior tooth. Length
18, width 7 mm.

Locality- —(Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados.

Certthium turriculum? Gabb

Plate 22, Figure 6
Cerithium terriculum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238,
1873.

We have an unlabelled specimen sent by Gabb which judg-
ing from his description is the unfigured C. turriculum.

Cerithium domtnicense Gabb
Plate 22, Figure 7

Cerithium dominicense Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238,
1873.

Our shells appear to be Gabb’s unfigured C. domzintcense.

Locality.— (Exp’d ’16) Zone D (Abundant), Rio Gurabo
at Los Quemados.

Genus Birrium (Leach) Gray
Bittium asperoides Gabb
Plate 21, Figure 17

Bittium asperoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239,
1873.

We have a number of Gabb’s metatypes of this unfigured

126 BULLETIN 29 290

species and collected ourselves approximately eleven hundred
shells of all sizesranging from 1.5 to 5.5mm. The smaller agree
with the metatypes, which are 2-3 mm. long.

I have vainly tried to separate out the larger which inter-
grade and show no constant differences. They often have var-
ices. The Floridian analogue is B. bozplex Dall, and the related
Gatun shell is B. Scotti B. and Pils. The Dominican species has
not been found elsewhere.

Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (Ex-
tremely abundant).

Bitittum canaliculatun Gabb
Plate 21, Figure 18

Bittium canaliculatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239,
1873:

Our metatypes from Gabb show considerable variation, but
one is obviously identical with our specimens. This species has
not heretofore been figured. We found it a comparatively rare
shell.

Locality.— (Exp’d’16) Bluff 3, Cercado de Mao.

Genus PoTaAMIDES Brongniart
Potamides dentilabrum Gabb

Certthium dentilabrum Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 237,
EO73..

We have an imperfect metatype from Gabb of this interest-
ing, unfigured shell. The biplicate columella and dentate outer
lip seem to place it in the sub-genus 7erebralia Swainson, now
found in Borneo.

Potamides Ormeét, n. sp.

Plate 22, Figure 8

Shell rather large, solid; whorls flattened, coarsely cancel-
lated by the intersection of many close-set, longitudinal ribs,

2Qz DOMINICAN FossILsS—MAuRy 127

crossed by three thick, flat, spiral cords and cut by the three
grooves alternating with the cords, thus forming a tripartite
series of quadrangular beads to each whorl; the uppermost cord
and groove are the strongest and deepest; columella not plicate,
body whorl ascending slightly and much thickened near the aper-
ture. Lengte of imperfect specimen 30, greatest width 15 mm.
Collected by Gabb in Santo Domingo.

This species is named in honor of Mr. and Mrs. Norman
Orme, La Receptoria, Puerto Plata.

Genus SERPULORBIS Sassi

Serpulorbis granifera Say
Plate 22, Figure 9

Serpula granifera Say, Jour. Acad. Nat. Sci. Phila., ist ser. vol. 4, p.
154, pl. 8, fig. 4, 1824. Reprint Bull. Amer. Paleont. No. 5, 1896.

Vermetus decussatus Gabb, Trans. Amer. Phil. Soc,, vol. 15, p. 240,
1873. Not V. decussatus Gmelin.

Serpulorbts granifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2,
Pp. 303, 1892.

Anguinella virginiana Whitfield, Mon. 24 U. S. Geol. Survey, p. 132,
pl. 24, figs. 1-5, 1894.

Vermetus graniferus Martin, Maryland Gecl. Survey, Miocene, p. 232,
pl. 54, figs. 14, 15, 1904.

Our Dominican specimens are very like S. granzfera tenera

Dall from the Upper Miocene of North Carolina. They are not
identical with the recent Antillean species, S. decussatws Gmelin.

Localities.—(Exp’ ’16) Rio Cana, Guayubin to Mao road;
Zone B, Rio Garabo at Los Quemados.

Serpulorbis papulosa Guppy

Plate 22, Figure Io

Vermetus papulosus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 292, pl.
17, fig. 3, 1866.

Petaloconchus sculpturatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
241, 1873.

Vermetus papulosus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519,
1876.

128 BULLETIN 29 262

Serpulorbis papulosus Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1585,
1903.

Guppy described a slender tip from Bowden. His figure is
very ‘misleading, but he describes the characteristic rows of tu-
bercles interlined with crenate strie. Our party found this spe-
cies in place up to eighteen inches in length but too fragile to se-
cure entire.

Localities. — (Exp’d ’16) Rio Cana, Guayubin to Mao
road (very fine); Zone F, Rio Gurabo at Los Quemados.

Genus PETALOCONCHUS Lea

Petaloconchus domingensis Sowerby
Plate 22, Figure 11,

Petaloconchus domingensis Sowerby, Quart. Jour. Geol. Soc. London,
vol. 6, p. 51, pl. 10, fig. 8, a, b, c, 1849.

Petaloconchus sculpturatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
240, 1873. Not sculpturatus Lea.

Fetaloconchus sculpturatus Guppy, Quart. Jour. Geol. Soc., vol. 32, p.
519, 1876.

Vermetus ( Petaloconchus) scuipturatus Dall (in part), Trans. Wagner
Inst., vol. 3, pt. 2, pp. 305, 306, 1892.

Petaloconchus domingensis Brown and Pilsbry, Proc. Acad. Nat. Sci:
Phila., p. 359, I9II.

Petaloconchus domingensis typically coils in a widening cy-
linder, with whorls much flattened on the sides and angulate at
the base. P. sculpturatus coils.in a tapering cone, with whorls
less flattened and more convex at the base. P. domingensis oc-
curs at Bowden; Trinidad (Caroni Series); and Gatun.

Localities. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que-
mados; Bluff 1, Cercado de Mao. :

Petaloconchus Laddfrankline, n. sp.
Plate 22, Figure 12
Shell delicate, slender, gracefully spirally undulating. Sur-

face regularly and elegantly ornamented with many close, equi-
distant, longitudinal beaded cords which conform to the spira

293 DOMINICAN FossILs-—-MAURY 129

undulations of the tube. The intervals between the cords are
about equal in width to the cords and are smooth except for
very fine transverse stric. At one end two septa are visible
within the tube, which indicates that the shell belongs to Lea’s
Petaloconchus. Diameter of tube 2, length 30 mm.

Named in honor of Mrs. Christine Ladd-Franklin.

Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que-
mados. (Rare).

Genus SILIQUARIA Lamarck
Siliquaria gurabensis, n. sp.
Plate 22, Figure 13

Shell small, irregularly spirally convoluted. Apex blunt,
convex; whorls nearly smooth, marked only by microscopic
transverse growth-lines and by a few, faint, nearly obsolete lon-
gitudinal striations. Fissure narrow, in the early whorls repre-
sented by a series of minute perforations, in the later whorls
these pores are entirely closed over, the margin of the slit being
irregularly crenulate. Greatest diameter of tube 2.5 mm.

This genus has never before been reported from Santo Do-
mingo. It is very rare in the American Tertiaries.

Locality. — (Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados.

Genus TURRITELLA Lamarck
Plate 22, Figure 14

Turritella planigyrata Guppy, Proc. Scient. Assoc. Trinidad, p. 169,
1867.

Turritella planigyrata Guppy, Geol. Mag. London, p. 408, pl. 18, fig.
5, 1874. (Very poor figure).

Turritella planigyrata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240,
1873.

Turritella planigyrata Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519,
1876.

Our shells seem identical with Guppy’s type from the Caroni
Series, Trinidad. The Gatun analogue is 7. gatunenszs Conrad,

130 BULLETIN 29 294

which has much more deeply excavated whorls.
Locality. — (Exp’d ’16) Bluff 2, Cercado de Mao.

Turritella tornata Guppy
Plate 22, Figure 15

Turritella tornata Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.
580, pl. 26, fig. 12, 1866.

Turritella tornata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240. 1873.

Turritella tornata Dall, Trans. Wagner Inst., vol. 3, pt. 2, p. 312 ,1892;
Id. pt. 6, p. 1585, 1903.

Turritella tornata Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila.,
Pp. 359, IOII.

The beads on our specimens are not so large as on the type
from Cumana; but the description otherwise fits exactly. 7.
tornata is of the same group as Conrad’s 7. altilirva from Gatun
and Heilprin’s 7. perattenuata from the Florida Pliocene, but
both these species are very much larger with coarser, bolder
sculpture.

Localities. — (Exp’d’16) Zones D and E, Rio Gurabo at
Los Quemados.

Turritella submortont, n. sp.
Plate 22, Figure 16

Shell turreted, the whorls increasing rapidly, excavated above
the suture and sharply carinated at their anterior fourth by a
ridged spiral thread, posterior to this carina are five or six less
prominent spirals and anterior to it are two, making about eight
in all. Some or all of the spirals are microscopically beaded.
Length of incomplete shell 25, greatest width 9 mm.

Some of the later Lignitic and early Claiborne specimens of
T. Mortont resemble this species. One set collected by Professor
Harris in Newcastle, Virginia, are strikingly like in surface mark-
ings and general aspect.

The Gatun analogue of the Dominican species is 7. mzmetes
Brown and Pilsbry.

Localities. —(Exp’d ’16) Zones D add E, Rio Gurabo at
Los Quemados.

495 DOMINICAN FossILs—MAuRY 131

Genus SOLARIUM Lamarck

Solarium quadriseriatum Sowerby

Plate 23, Figures I, 2

Solarium quadriseriatum Sowerby, Quart. Jour. Geol. Soc. London,
vol. 6, p. 51, pl. 10, fig 8 a, b, c, 1849.

Solarium quadriseriatum Guppy, Quart. Jour. Geol. Soc., vol. 22, p.
291, 1866.

Architectonica quadriseriata Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
228, 1873.

Solarium quadriseriatum Guppy, Geol. Mag. London. p. 438, 1874.

Solarium granulatum Dall (in part) Trans. Wagner Inst. Sci., vol. 3,
pt. 2, p. 392, 1892. Not S. granulatum Lamarck.

Solarium quadriseriatum Dall, Trans. Wagner Inst., vol. 3, pt. 6, p.

1585, 1903.

This pretty species is not uncommon in Santo Domingo
and occurs at Bowden, Anguilla and the Caroni series of Trini-
dad. f

Localities—(Exp’d’16) Bluffs 1 and 3, Cercado de Mao;
Zone A and B, Rio Gurabo at Los Quemados.

Solarium granulatum Lamarck
Plate 23, Figure 3,

Solarium granulatum Wamarck, An. sans Vert., vol. 7, p. 3, 1822;
Ency. Method, pl. 446, fig. 5 a-b, 1792.

Architectonica perspectiva Tuomey and Holmes, Pleioc. Foss. S. Car.,
p. 120, pl. 26, fig. 6, 1857. Not. S. perspectiva Linné nor Lamarck. |

Solarium granulatum Dall (in part) Trans. Wagner Inst. Sci., vol. 3,

Pp. 2, p. 329, 1892.
Solarium gatunensis Toula, Jahrb. der K.—K. Geol. Reichsanst. Wien,

vol. 58, p. 693, pl. 15, fig. 3, 1908.

Our shell almost exactly matches a specimen of S. gvanzu-
latum from Alum Bluff, Florida, and is so like Toula’s S. gatu-
nensis that it seems also identical with the Gatun form. S. granu-
latum ranges from the Oligocene to the recent. It is living in
the Antilles.

Locality.—(Exp’d 16) Zone I, Rio Cana at Caimito.

132 BULLETIN 29 296

Solarium Stonemaneé
Plate 23, Figures 4, 5

Shell conic, depressed, whorls six, handsomely ornamented
with oblique, radiating plications often divaricating, cut just
above the suture by a single impressed spiral line, thus forming
a revolving row of fine beads beneath which, on the periphery
of the last whorl, are three more beaded spirals, progressively
finer, all three extending into the aperture; perpihery rounded;
under surface sculptured with radiating, divaricating plications
similar to those on the upper surface; the shell is so deeply per-
forated that one can look through to the apical volution; margin-
al teeth small, numerous. Greatest diameter 15, height 9 mm.
This species has a slight general resemblance to Conrad’s S.
trilineatum.

This rare and exquisite shell is named in honor of Dr. Ber-
tha Stoneman, Huguenot College, University of the Cape of Good
Hope.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao.

Genus Rissoina d’Orbigny
Rissoina crasstlabris Gabb
Plate 21, Figure 19

Eulima crassilabris Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227,
1873.
Cf. Hulima crassilabyis Gabb, Jour. Acad. Nat. Sci. Phila., vol. 8, sec.
ser., p. 358, pl. 46, fig. 43, 1874—1881. (Pliocene Moen shell).
The thickened outer lip seems so characteristic of Rzssoina
that the species is here referred to that genus.
Localities —(Exp’d ’16) Bluff 3, (Abundant), Bluff 2,
(Rare), Cercado de Mao.

Rissoina Sagraiana d’Orbigny

Plate 21, Figure 20
kissoina Sagraiana d’Orbigny, Hist. Nat. y Pol. Isla de Cuba, vol. 5,
Pp, 162, 1845; A. Sagra in Atlas 8, Mollusca, pl. 12, figs. 4, 5, 1855.
Rissotna Sagraiana Dall, Bull. 37 U. S. Nat. Mus., p. 150, 1889.

297 DOMINICAN FossiLts—MAuRY 133

Rissoina Sagraiana Guppy and Dall, Proc. U. S. Nat. Mus. No. 1110,
vol. 19, p. 322, 1896.

Rissoina Sagraiana Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1585, 1903.

This species is referable to the section Phostnella Moerch.
The shell was first described from the recent fauna of Cuba. It
has been found at Bowden, but not heretofore in the Dominican
blue clays.

It may here be noted that Gabb’s genus /ofszs was founded
according to Guppy and Dall ona young /7ssozma and is inval-
id. Gabb’s unfigured Cevithidea minuta seems to be also a Res-
soina.

Locality —(Exp’d’16) Bluff 3, Cercado de Mao. (About
50 specimens). Bluff 2 (Comparatively rare.)

Genus Cruc1BULUM Schumacher

Crucibulum (Dispotea) cf. prleolum
Plate 23, Figure 6

We collected twenty-five specimens of a Crucibulum appar-
ently closer to the young of C. pzleolum than to any other species.
Our shells are usually entirely smooth, but a few show the irreg-
lar undulations characteristic of the adult pzleolum. They are
not C. spinosum with which Gabb identified his Dominican spec-
imens. They may be a new species.

Localities. —(Exp’d’16) Bluffs 2 and 3, Cercado de Mao.

Genus XENOPHORA Fischer de Waldheim
Xenophora conchyliophora Born

Trochus conchyliophorus Born, Mus. Cees. Ind., p. 333, 1778.

Trochus agglutinans Lamarck, Anim. sans Vert. 7, 14.

Phorus agglutinans Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 241,
1873.

Xenophora conchyliophora Dall, Trans. Wagner Inst. Sci., vol. 3, pt.
2, pp. 360-362, 1892: Bull. 90, U. S. Nat. Mus., p. 105, pl. 15, figs.
Hy anion ES,

We secured a quantity of these shells on the beach at Monte
Cristi identical with the fossils from the blue clays.

134 BULLETIN 29 298

Localities.— (Exp’d ’16) Zone E and F, Rio Gurabo at
Los Quemados.

‘enophora delecta, Guppy

Plate 23, Figures 8, 9

Fhorus delectus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 529, 1876.
Xenophora dilecta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1585.

This shell is easily distinguished from X. conchyliophora by
its strikingly ridged upper surface and rows of granules on the

under surface. Guppy’s type was one of Heneken’s Dominican
shells, but it also occurs at Bowden.

Localities. —(Exp’d’16) Bluff 1, Cercado de Mao; Zone F,
Rio Gurabo.

Xenophora (Turgurium) imperforata Gabb
Onustus tmperforatus Gabb, Trans, Amer. Phil. Soc,, vol. 15, p. 241,
1873.

This shell can be immediately recognized by the prolonga-
tion of the periphery into the blade-like flange characteristic of
Turgurium. On comparing it with the recent Antillean 7. cari-
be Petit, of which we have a metatype from Petit, the fossil is
seen to be broader, flatter and more coarsely striate.

Locality.—(Exp’d’16) Zone F, Rio Gurabo at Los Que-
mados.

Genus NaTIca Scopoli
Natica canrena (Linné) Moerch
| Plate 23, Figure ro
Nertia canrena (Vinné in part) Auct., Morch, Malak. Blatt. 24, p. 62,
1877.

Natica canrena Gabb, Trans. Amer, Phil. Soc., vol. 15, p. 223, 1873.

Natica canrena Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 518, 1876.

Naticacanrena Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 364-365,

1892.
Natica pe Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p.
508, 1912.

Shell easily distinguished by the characteristic tangential
plicee adjoining the suture. It is a widespread and ancient
species, ranging from the Oligocene to the recent, found in Flori-
da, North Carolina, Costa Rica, Trinidad and at Gatun. It is

299 DOMINICAN FossIrts—MAuURY 126

living in the Antilles and south to Pernambuco.
Localities.— (Exp’d ’16) Bluff 1, Cercado de Mao; Zone
I, Rio Cana; Sandy clays, Rio Cana.

Natica Young? n. sp.
Plate 23, Figures II, 12

Shell subglobular, with five rounded whorls; suture well-de-
fined; surface smooth except for growth-lines; aperture semi-
lunar; posterior callus of inner lip thickest at the angle of the
aperture; umbilical callus coiled on the umbilical wall near the
base, leaving the upper partof the umbilicus entirely open. Var-
ious specimens give the following heights and widths: 23 X 22,
D7 xeOs 22952 le TIM

This species resembles the Jacksonian Hocene, JV. permunda
Conrad, and to a less degree, the Chipolan Oligocene JV. alfical-
fosa Dall. But the former has the callus coiled on the middle of
the wall, and the iatter at the upper end, while our shell has it
coiled near the base. Doubtless V. permunda is the precursor
of the Dominican shell.

This species is named in honor of Professor Young, South
African College, Cape Town.

Localities—(Exp’d ’16) Zones A, B, E, F, G, Rio Gura-
bo at Los Quemados; Bluffs 1, 2, Cercado de Rio Mao; Zone I,
Rio Cana at Caimito.

Natica (Stigmaulax) sulcata Born

Plate 23, Figure 13
Natica sulcata Born, Mus. Czes. Vindobonensis, pl. 17, figs. 5, 6.
Natica sulcate Guppy, Quart. Jour. Geol. Soc. London,vol. 22, p. 290,
pl. 18, figs. 14, 15, 1866.
Natica sulcata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 233, 1873.
Natica sulcata Guppy, Geol. Mag. Lendon, p. 437, 1874; Quart. Jour.
Geol. Soc., vol, 32, p. 518, 1876.
Natica (Stigmaulax) sulcata Dall, Trans. Wagner Inst. Sci., vol. 3,
pt. 2, p. 366, 1892; /d. pt. 6, p. 1585, 1903.
This handsome grooved species attained a large size and is
abundant in the blue clays. It has been found at Bowden and
Cumana and is still living in the Antilles.

136 BULLETIN 29 300

Localities—(Exp’d ’16) Bluffs 2, 3, (Very abundant) Cer-
cado de Mao; Rio Cana, Gravels; Rio Cana, Sandy clays; Zones
H and I, Rio Cano at Caimito; Zones E and G, Rio Gurabo at
Los Quemados.

Genus Poxtinices Montfort

Polinices subclausa Sowerby
Plate 23, Figure 14

Natica subclausa Sowerby, Quart. Jour, Geol. Soc. London, vol. 6, p.
51, 1849.

Natica subclausa Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 290, pl.
18, fig. 8, 1866.

Mammilla mamillaris Gabb (in part), Trans. Amer. Phil. Soc., vol.
15, p. 223, 1873. Not P. mammuillaris Lamarck.

Natica subclausa Guppy, Geol. Mag. London, p. 437, 1874; Quart.
Jour. Geol. Soc., vol. 32, p. 519, 1876.

Polyntces subclausa Dall, Trans. Wagner Inst. Sci., vol 3, pt. 6, p. 1585,
1903.

Polinices subclausa Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p
360, I9QIl.

We collected shells of P. mammillaris Lamarck on the Monte
Cristi beach. They are much larger than the fossils and light
orange brown, not striped. Some of the fossils retain their color
pattern of gray stripes on a white background. These differences
indicate that Sowerby’s species is distinct from the recent ana-
logue.

P. suclausa has been found at Bowden and Gatun and is
abundant in Santo Domingo.

Localities.—(Exp’d’16) Zones H and I, Rio Cana at Cai-
mito; Gravels and sandy clays of Rio Cana; Bluffs 2 and 3, Cer-
cado de Mao; Zones D and E, Rio Gurabo at Los Quemados.

Polinices Stantslas-Meunieri
Plate 23, Figures 15, 16
Shell ovate, with five and a half rounded whorls; spire conic;
entire surface smooth except for growth-lines; body whorl very
slightly concave in front of the suture, elsewhere evenly rounded,
aperture semi-circular; inner lip with a thick posterior callus ex-

(ea

ies)
es)

DOMINICAN Fossits-—MAuRY Wa)

tending without interruption half of the distance from the angle
of the aperture to the base, and concealing the upper part of the
perforation; the callus is then reduced to half its width by a rect-
angular truncation. Altitude 36, width 28 mm.

It is with the greatest pleasure that Iname this shell in honor
of Monsieur Stanislans-Meunier of Paris, as a token of highest
esteem and friendship, and a souvenir of his charming expédztzons
glologiques.

Locality.—(Exp’d ’16) Rio Cana, Cerro Gordo to Mao
road (Guayubin to Mao telephone line).

Subgenus NeverIvTA Risso

Neverita nereidis, n. sp.
Plate 23, Figures 17, 18
Shell greatly flattened, smooth except for fine arcuate
growth-lines which are strongest on the under surface; whorls five,
the first two minute, conical, subsequent volutions flattened
above, concavely excavated beneath; umbilicus partly overhung
by atongue-like callus capping the pillar-like umbilical callus
which enters and stops up the perforation; aperture large; outer
ip slightly sinuous beneath the periphery; the under surface and
interior of some specimens show traces of an original chestnut
color. Diameter of largest shell 36, altitude 12 mm.
The nearest ally of this fine shell is Humboldt’s larger
species, JV. glauca, living from Acapulco to Panama.
Localities. — (Exp’d’16) Zones H and I, Rio Cana at
Caimito (The most characteristic fossil of the upper Cana).

Genus AMAuROopPSIS Moerch

Amauropsis Guppyt Gabb

Plate 23, Figure 19
Natica phastanelloides Guppy, Quart. Jour. Geol. Soc. London, vol.
22, p.17, fig. 1, 1866. Not V. Phasitanelloides d’Orbigny, De la
Sagra, Hist. Pol.y Nat. Isla de Cuba, Atlas 8, Palzeont, Tab. 1,
iW Fe
Amaura Guppyt Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 224, 1873.
Natica phasianelloides Guppy, Quart. Jour. Geol. Soc., London, vol.

138 BULLETIN 29 302

32, p. 519, 1876.
Ampullina Guppyt Dall, Trans. Wagner Inst., Sci., vol. 3, pt. 6, p
1585, 1903.

Closely allied to the Eocene A. jacksonensis Harris and to
the Gatun Lupia perovata Conrad. A. Guppyi occurs in Anguilla,
the San Fernando beds of Trinidad, and those of Bowden. The
genus is now limited to the Arctic seas. ‘

Localities.—(Exp’d ’16) Bluffs 1 and 2, Cercado de Mao;
Zones H and I, Rio Cana at Caimito; Rio Cana gravels; Zone G,
Rio Gurabo at Los Quemados.

Amauropsis Guppyt variety gurabensts, n. vat.
Plate 23, Figure 20

Shell imperforate, with a short, sharp spire and ventricose
body whorl; suture impressed; whorls eight, very markedly flat-
tened in front of the suture giving a decidedly shouldered aspect;
aperture very large. Length 35.5, of spire 11.5, of aperture
24 mm. Extreme forms are very unlike typical shells of 4.
Guppyt but intergrade. The nearest ally is the smaller 4. flovi-
dana Dall from the Tampa silex bed.

Locality.—(Exp’d ’16) Zone G, Rio Gurabo at Los Que-
rmados.

Genus Sinum Bolten

Sinum gatunense Toula
Plate 24, Figure 2
Sigaretus (Lupita Conrad) gatunensis ‘Toula, Jahrb. der K—K Geol:
Reichsanstalt Wien, vol. 58, p. 697, pl. 28, fig. 3, 1908.

Our shells agree so well with Toula’s figure and description
of S. gatunense that they seem identical. | They are also closely
related to the recent S. perspectivum. Guppy’s excentricum seems
about intermediate between this and the following species and
differs from both in ornamentation.

Localities —(Exp’d’16) Zone G, Rio Gurabo at Los Que-
mados; Bluff 3, Cercado de Mao.

303 DOMINICAN Foss1rs—MAuURY 139

Sinum Nolan, n. sp.
Plate 24, Figure 1

Shell convex, almost imperforate, translucent yet fairly sub-
stantial; spire low, whorls four, the earlier smooth, later volu-
tions so very faintly striated asin some lights to appear smooth,
but under a lens their surface is seen to be covered with exces-
sively fine, wavy, spiral threads; aperture large, the spreading
outer lip joining the body above the periphery of the preceding
whorl; inner lip somewhat thickened; there is a mere chink or
suggestion of aperforation. Greatest diameter 19, of aperture
Hele TTT.

In general outline, convexity and appearance of the spire
this shell resembles the larger, recent Oriental species, S. /evz-
gatum Recluz, but our fossil is even less faintly striated than that
shell. The Floridian fossil analogue is S. chipolanum Dall. S.
Gabbi Pilsbry and Brown seems to be a pigmy relative, but the
perforation is relatively much larger.

I take great pleasure in naming this rare shell in honor of Dr.
Edward J. Nolan, of the Academy of Natural Science, Philadel-
phia.

Loeality.—(Exp’d’16) Zone E, Rio Gurabo.

D. SUPER-FAMILY PTENOGLOSSA

Genus EPitromMiumM Bolten
Epitomium minutissimum Gabb
Plate 24, Figure 3
Scalaria minutissima Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 224,
1873.
Distinguished by its slender form and blade-like lamellce
toothed at the shoulders of the whorls. Our shells answer well to

Gabb’s description of this unfigured species.
Localities —(Exp’d’16) Bluff 3, Cercado de Mao (Rare).

Epitomium riparum, n. sp.
Plate 24, Figure 4

Shell with convex whorls, adorned by many low lamelle,

140 BULLETIN 29 304

their edges curled laterally so as to appear from above rounded
and slightly flattened, lamellee numbering about nineteen on the
last whorl; under the microscope the spirals in the interspaces
appear as raised flat threads, a little stronger than in Z. mznutzs-
simum, each whorl usually also has a single heavy, rounded
opaque white varix which on the body whorl marks the termina-
. tion of the outer lip, but one shell has two additional varices on
the last whorl, all three being on the latter third of the volution;
all the sculpture extends to the base of the shell, aperture round,
lip thickened, continuous. An incomplete shell of six whorls
measures 7X3mm. The style of sculpture resembles that of the
recent £. gracilentum Gould. Our shell can be recognized by its
many low lamelle, fine spirals and rounded white varices.
Locality.—(Exp’d’16) Bluff 3, Cercado de Mao.

Epitomium cercadicum, n. sp.
Plate 24, Figure 5

Shell rather broadly conic; apex lost, remaining whorls six,
convex, adorned with blade-like lamelle, thirteen on the last
whorl, which are not denticulate at the shoulder nor hooked at
the suture, but simple and continuous or subcontinuous, from
whorl to whorl; the lamellze appear to be made up of a single
sheet each; spirals nearly obsolete, exceedingly faint even under
strong magnification; the interspaces shining and polished; suture
deep; aperture rounded; lip thickened, the thickening interrupted
at its contact with the body whorl. Length of decollate shell
6.25, greatest width 3 mm.

The broader basal whorl, more rapidly tapering spire, and
blade-like, subcontinuous, simple, not toothed lamellee differenti-
ate this species.

Locality —(Exp’d’16) Bluff 3, Cercado de Mao. (Rare).

Epitomium textuvestitum, n. sp.
Plate 24, Figure 6

hell extremely long and slender; suture constricted, some-

305 DoMINICAN Foss11s—MAuRY 141

what obscure; whorls twelve to thirteen, the first three ‘smooth,
nuclear; post-nuclear whorls convex, ornamented with many,
close-set, undulating, longitudinal ribs (fourteen on the last
whorl) which on thelater volutions usually either do not quite
extend to the upper (posterior) suture, or else are suddenly bent
to the left and diminished on approaching it; the entire surface
of the shell, excepting only the protoconch, exhibits under the
lens a most curious texture which might be likened toa woven
cloth in which the woof (representing the spirals) is some-
what coarser than the warp; there is one heavy, rounded
varix to each volution, that of the last whorl bordering the lip,
but those of the preceding whorls forming a more or less continu-
ous line ascending obliquely up the shell; aperture small, ovate;
lip bordered by a very thick, minutely crenulated, platform-like
varix sunken a trifle below the level of the lip. Length 16,
width 4.75 mm.

This curious species is characterized by its singular texture
and extraordinary lip recalling that of Czvsotrema Moerch, but
the shell is not cancellate as in that section. A species slightly
resembling our fossil was dredged by the Blake in 100 fms. off
Barbados and described by Dallas Scala hellentca var. Moerch-
Zana,

Locality. —(Exp’d’16) Zone E, Rio Gurabo, at Los Que-
mados (Rare).

Genus Ac is Lovén

Acts acuminatotdes, n. sp.
Plate 24, Figure 7

Shell minute, polished and shining, apex broken, remaining
whorls seven and a half, slightly convex especially anteriorly, en-
tirely smooth and without ornament; suture distinct, linear, not
channeled. Length of shell 3.6, greatest diameter .75 mm.

This species is named from its resemblance to the Jamaican
Aclis acuminata Guppy but that is characterized by its over-
hanging whorls, while ours only widen very slightly anteriorly,
are more closely coied, flatter, and not so constricted at the

142 BULLETIN 29 306

suture. Evidently our shell is distinct from the unfigured A.
politz since Gabb emphasizes its channeled suture not present in
ours.

Locality. —(Exp’'d’16) Bluff 3, Cercado de Mao.

DO SORER FAVILSG GYTINOGEOSSA
Genus MELANELLA Bowdich

Melanella (Eulima) cercadica, n. sp

Plate 25, Figure 1,
Eulima acicularis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227,
1873.
Not “ulima acicularis A. Adams, Aun. and Mag. Nat. Hist., p. 125,
1861.

As Gabb’s name was preoccupied by Adams, a new name is
needed and cervcadica seems appropriate. Gabb’s species robusta
was also preoccupied by Adams in 1861.

M. cercadica resembles the recent dzfasciata d’Orb. (acuta
Sowerby) but the latter is not constricted at the suture, is small-
er, and has a spiral line of color, whereas our shells show traces
of a band of fulvous yellow in the constricting zones.

Locality—(Exp’d ’16) Bluff 3, Cercado de Mao.

Melanella (Eulima) maoica, n. sp.
Plate 25, Figure 2

Shell small, moderately slender, solid, polished; whorls elev-
en, the apical large, knobbed, the second convex, projecting; sub-
sequent whorls straight, their width two and a third times their
axial height; suture distinct, slightly overhanging the following
whorl; aperture small, outer lip thin, a little inflated, oblique, ar-
cuate, slightly produced anteriorly. Length of shell 4.10, of
body whorl 1.50, of aperture .g0, greatest diameter 1.10 mm.
The most characteristic feature of this species is its large knobbed
nucleus.

Locality—(Exp’d ’16) Bluff 3, Cercado de Mao.

307 DOMINICAN FossILS—MAvuRY 143

Melanella (Eulima) jacululum, n. sp.
Plate 25, Figure 3

Shell small, slender, solid, porcellanous; whorls about twelve,
their width nearly twice their height, their sides flattened, some-
what overhanging the following volutions; suture distinct, trans-
verse; base of body whorl rounded; aperture small; outer lip
thin, arcuate, slightly produced anteriorly; the shell shows traces
of arosy band near the suture. Length of shell 4.25, of body
whorl 1.50, of aperture .70; greatest width 1.25 mm. This
species is characterized by its overhanging whorls.

Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao.

Melanella (Eulima) Tethyos, n. sp.
Plate 25, Figure 4

Shell small, slender, surface entirely smooth, whorls about
twelve, their sides straight, their axial height being equal to one-
half their width; suture distinct, transverse; base of body-whorl
rounded; aperture small; outer lip simple, slightly oblique, arcu-
ate, hardly produced anteriorly; inner lip with a small callus,
wider on the columella. Length of shell 6.60, of body whorl
1.25, of aperture 2.25; diameter 1.85 mm.

Locality.— (Exp’d ’16) Bluff 3, Cercado de Mao.

Genus Niso Risso
Niso grandis Gabb
Plate 24, Figure 8

Niso grandis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227, 1873.

Niso grandis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903.

Gabb’s shell was unusually large with a diameter of 13 mm.
As none of ours attained this size I felt some doubt of their iden-
tity with Gabb’s and asked Dr. Dall’s opinion. He pronounced
our shell V. gvandis.

Localities —(Exp’d ’16) Zone I, Rio Cana at Caimito;
Bluff 3, Cercado de Mao;

144 BULLETIN 29 208

Genus PyRAMIDELLA Lamarck
Pyramidella canaliculata Gabb

Plate 25, Figure 5
Obeliscus canaliculatus Gabb, (in part) Trans. Amer. Phil. Soc.,’ vol.

15, Pp. 225, 1873.
Obeliscus canaliculatus Dall, Trans. Wagner Inst. Sci., vol 3, pt. 2, p.

247, 1892.

Gabb’s description of O. canaliculatus comprises a number of
different forms, some of which we also collected. Dr. Dall’s re-
mark concerning the type corresponds. He says, (Trans. Wag-
ner Inst Scie) voll 3. pt.) 2.) p. 247) 1692). baeisipposed ites
at Philadelphia comprise three or four species belonging to several
distinct genera, all loose in one tray together.’’ I have here re-
stricted the species canaliculata to the following form, chosen
from its possessing the more striking of the characters enumer-
ated by Gabb.

Shell elongate-conic, slender, nuclear whorls two, subsequent
whorls thirteen, flattened, shouldered at the summit which is
minutely crenulated; suture deeply channeled, the center of the
channel being occupied by a fine sutural thread; periphery of last
whorl sulcate; base rounded; perforation minute, surrounded by
a stout fasciole; aperture oval; columella slender, with one trans-
verse, lamellar, posterior plication and two oblique folds below,
the anterior of which borders the canal; outer lip thin, with two
or three denticles, a varying distance within. Length 11, diam-
eter 4mm. This species somewhat resembles the recent P. pana-
mensis Bartsch, dredged off Panama.

Sowerby described as canaliculatus an entirely different
species from the Sandwich Islands (Proc. Zool. Soc., London,
for 1873) but apparently this was not published until early in
1874, so that Gabb’s name has priority.

Locality.—(Exp'’d ’16) Bluff 3, Cercado de Mao.

Pyramidella semicanaliculatas, n. sp,
Plate 25, Figure 6

Shell resembling P. canaliculata but differing markedly in

309 DOMINICAN FossILs-——-MAuRY T45

the character of the suture. In P. canaliculata the whorls are ex-
cavated both above and below the sutural thread thus forming a
double channel in the center of which the sutural thread lies. In
this shell the whorls are excavated only de/ow the sutural thread
so that the channel is single and the sutural thread lies just pos-
terior to it; whorls thirteen; columella tri-plicate; outer lip with
several denticles; shell minutely perforate, the perforation bor-
dered by a fasciole. Length 9.5, diameter 3 mm.

This species resembles P. forulata Guppy from Bowden; but
our fossil is nearly twice as long, and with a much higher spire.

Locality.k—(Exp’d’16) Bluff 3, Cercado de Mao.

Pyramidella diademata, n. sp.
Plate 25, Figure 7

Shell siender, sub-perforate, resembling P. seimzcanaliculata
but the sutural channel is deeper and the summit of the whorls
is strongly crenulated, and even the peripheral sulcus on the last
whorl is distinctly crenulated on its anterior border; whorls eleven
exclusive of the small, helicoid protoconch of about two addition-
al volutions; columella with three folds, the posterior nearly trans-
verse, the two anterior oblique and proximate; outer lip typically
with four strong denticles. Length of shell 9.25, greatest diam-
Guse 2 saakaal,

The distinguishing feature in this pretty species is its
strongly crenulate subsutural border.

Locality —(Exp’d’16) Bluff 3, Cercado de Mao.

Pyramidella Olssonz, n. sp.
Plate 25, Figure 8

Shell elongate-conic, slender, with fourteen whorls, proto-
conch helicoid, its axis lying at an angle to the main axis of the
shell; post-nuclear whorls flattened, slightly shouldered, very
weakly and minutely crenulated at the summit; suture narrowly
but rather deeply channeled; periphery of last whorl marked by a
fine, distinct revolving rib; base rounded; aperture narrowly oval;
columella tri-plicate, the two anterior folds oblique, parallel, the

146 BULLETIN 29 310

posterior slightly oblique; outer lip typically with three denticles
within, the stronger posterior; basal fasciole present; shell scarce-
ly, if at all, perforate.. Length 10, diameter 3 mm.

_ This species is distinguishable by the presence of the fine re-
volving rib.on the periphery of the last fwhorl, which takes the
place of the sulcus in P. canaliculata and semicanaliculata.

a shell is dedicated to Mr. Axel Olsson by whom it was
ound.

Locality.— (Exp'd °16) Bluff 3, Cercado de Mao.

Pyramidella (Callolongcheus) cercadensis, n. sp.
Plate 25, Figure 9

Shell related to P. jamaicensis Dall, but slenderer and more
rudely sculptured; protoconch small and immersed; post-nuclear
whorls eight, convex, not flattened as in jamaicensis; periphery
of last whorl marked by an incised spiral line or narrow sulcus;
the preceding whorls are wound at a distance equal to one-third
of the whorl in front of the peripheral sulcus; suture channeled
and the anterior border is very minutely crenulated; columella
with a large posterior, horizontal fold and two oblique anterior
folds, the most anterior being very weak, scarcely discernible;
base of body whorl rounded; outer lip with two denticles, the
posterior much the larger; surface of shell polished, marked by
growth-lines and by very faint spiral strize. Length of shell 4.25,
width 1.40 mm.

Locality. —(Exp’d’16) Bluff 3, Cercado de Mao (Rare).

Pyramidella (Orinella) Arionis
Plate 25, Figure 10

Shell small, slender, short, smooth and porcellanous; suture
distinct, whorls seven plus the rather large protoconch; the latter
is helicoid and consists of about one and a quarter visible whorls,
half immersed; post-nuclear whorls with their sides flattened,
somewhat turreted, axial height of each whorl equal to about
half its width; aperture small, columella with one large, promi-
nent plication. Length of shell 3.25, of body whorl 1.15, of

3iI DOMINICAN FossiLS—MAURY 147

aperture .50, greatest diameter .75 mm.
Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Genus TURBONILLA Risso
Turbonilla (Chemnitzia) Ogilvtee, n. sp.
Plate 25, Figure 11

Shell very slender and delicate, whorls twelve to thirteen in
addition to the small helicoid protoconch, volutions nearly flat
to slightly rounded, ornamented with heavy, nearly straight ribs,
slightly curved near the upper suture, and ending very abruptly
at the periphery of the body whorl number of ribs on the last three
whorls seventeen each; interspaces smooth and polished; suture
distinct, bordered posteriorly by a smooth, narrow band; base of
shell smooth; columellar fold inconspicuous. Length 6.5, diam-
eter I mm.

This little shell belongs to the subgenus Chemmnztzza d’Or-
bigny. It is named in honor of Professor Ida H. Ogilvie of Bar-
nard College.

Gabb’s unfigured 7. augusta appears to have been a Chem-
nitzia but is invalid, as Carpenter had used the name nine years
before.

Locality —(Exp’d’16) Bluff 3, Cercado de Mao.

Turbonilla (Chemnitzia) yaqguensis, n. sp.
Plate 25, Figure 12

Shell very small and slender, with ten slightly convex
whorls ornamented with narrow oblique ribs which extend to the
posterior suture and end abruptly at the periphery of the last
whorl; interspaces considerably wider than the ribs, smooth and
porcellanous; the last three whorls each have about thirteen ribs;
suture distinct; columellar fold inconspicuous. Length 3.60, di-
ameter .65 mm.

This shell is distinguished by its small size, slightly convex
whorls, and oblique ribs, much narrower than their interspaces.

148 BULLETIN 29 3i2

Locality.—(Exp'd ’16) Bluff 3, Cercado de Mao.

Turbonilla ( Chemnttzta) cercadensts, n. sp.

Plate 25, Figure 13

Shell very minute, resembling in form and in the number of
whorls Guppy’s 7. plaséica, but his shell is described as having
spiral strize and is therefore a Pyrgiscus; whorls six (in addition
to the large helicoid nucleus, flattened on the sides and a trifle
narrower below than above, giving a turriculate appearance to
the whole shell; ribs straight, seemingly ending at the periphery
of the last whorl but actually extending feebly beyond it; ribs
broad, those ornamenting the last whorl eighteen, and about the
same number are on the two whorls preceding the last; inter-
spaces between the ribs narrower than the ribs, smooth and pol-
ished; base of shell smooth. Length 2.5, diameter .60 mm.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao;

LTurbonilla (Strioturbonilla) dominicensis Gabb

Plate 25, Figure 14

Turbonilla Dominicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
225, 1873.

Shell small, long and very slender, whorls eleven, very
slightly convex, flattened at their centers; suture deep, with the
ends of the ribs somewhat projecting, giving the whorls a finely
coronate aspect; ribs straight, very slightly oblique, extending
only to the periphery of the body whorl or very weakly beyond;
number of ribs on the last whorl about sixteen, on the penulti-
mate fourteen and fourteen also on the third whorl from the last;
spiral sculpture very fine, delicate, and regular between the ribs,
coarser and weaker on the base; inner lip showing no fold, col-
umella twisted. Length 6, diameter .g mm. Slenderer than 7.
ornata d’Orb. and the ribs do not extend over the base as in that
shell.
Locality,—(Exp’d '16) Bluff 3, Cercado de Mao.

Be DOMINICAN Fossirs—MAuRY 149

Turbonilla (Pyrgiscus) Karlschmidti, n. sp.

Plate 25, Figure 15

Shell slender, with about eleven post-nuclear whorls, slightly
convex, ornamented with weak ribs, twenty-eight on the ulti-
mate and twenty-six on the penultimate whorl; ribs wider than
the interspaces and extending on the body whorl from the suture
to the umbilical region; in the interspaces there are about twenty
impressed spiral lines, irregularly spaced and defining unequal
bands, on the last whorls these spirals also continue to the um-
bilical region; aperture oblong-ovate. Length 8, diameter 1.5
mm. This shell resembles the west coast recent 7. castanea
Keep, but the last whorl of the fossil is not inflated. 7. furrz-
tissima Guppy from Bowden differs, among other respects, in its
sculpture.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Turbonilla (Pyrgiscus) Olssont, n. sp.
Plate 25, Figure 16

Shell resembling and related to 7. Karlschmidti, but with
fewer ribs and the ribs do not extend completely over the base;
nucleus planorboid, post-nuclear whorls thirteen, flattened or
slightly convex; ribs about equalling in width the interspaces,
ultimate whorl with nineteen, penultimate with eighteen ribs; in
the interspaces between the ribs and on the base of the shell are
numerous, variable spiral threads, near the middle of each whorl
three or four of these spirals are more pronounced; aperture
quadrate, columella with a fold. Length 9.5, diameter 2 mm.

Locality. —(Exp’d ’16) Bluff 3, Cercado de Mao.

Turbonilla (Pyrgiscus) turritissima Guppy
Plate 25, Figure 17

Turbonilla turritisstma Guppy, Proc. U. S. Nat. Mus., vol. 19, no.
IIIO, p. 316, pl, 28, fig. 5, 1896.

150 BULLETIN 29 © 314

Our shells resemble Guppy’s figure of the Bowden species and
appear identical.

Locality.—(Exp’d’16) Bluff 3, Cerceado de Mao; Zone H,
Rio Cana at Caimito.

Turbonilla (Pyrgiscus) riomacénsis, n. sp.

Plate 25, Figure 18

Shell extremely siender with thirteen or fourteen whorls ex-
clusive of the protoconch which is lost, whorls fattened or slight-
ly convex; suture deep, sub-canaliculate; whorls adorned with
straight, rather heavy ribs of which there are 16 on the last
whorl ending at the periphery; between the sutures in the inter-
stices between the ribs there are eleven incised spiral lines which
define regular, even, spiral bands; aperture oval; base of body-
whorl gently rounded, columella with a low, broad fold. Length
6.5, diameter .g0 mm. Distinguished by its slender form, deep
sutures and rather heavy ribs.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao.

Turbonilla (Visma) turritelloides Gabb

Plate 25, Figure 19
Turbonilia turritelloides Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
226, 1873.
Our shells answer well to Gabb’s description of this unfigured
species which resembles a miniature 7urrztella. Itisa Visma.
Locality.—(Exp’d ’16)—Bluft 3, Cercado de Mao (Abund-
ant).

Lurbonilla (Mormula) Nanniebelle, n. sp.
Plate 25, Figure 20
Shell with twelve to fourteen convex whorls adorned with
strong ribs and strong, raised spiral lines in the intervals between
the ribs; protoconch small, bulimoid, the last half im-
mersed, the apical half projecting laterally and lying at right

315 DOMINICAN FossIrs—MAUvURY LSE

angles to the main axis of the shell; ribs strong, straight, slight-
ly narrower than their interspaces and ending at the periphery
of the last whorl, seventeen on the ultimate and penultimate
whorls; the spiral ornamentation consists of incised lines which
define broad, ‘flat bands, four to a volution, the three anterior
bands being equal, the fourth a little narrower; base of shell
smooth or with one or two incised spiral lines near the peri-
phery; aperture round; columellar fold inconspicuous. Length
7.25, diameter I mm.

Occasionally a specimen shows a broad varix as represented
in the species 7. ambusta and T. catalinenszs Dall and Bartsch,—
a feature distinguishing Mormula from Pyrgiscus.

This dainty shell is named in honor of Miss Nannie Belle
Maury of Washington.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Genus Opostom1A Fleming

Odostomia Sancti-Dominici, n. sp.

Plate 25, Figure 21

Shell minute, polished, entirely smooth, sub-perforate, rather
thin; suture distinct; whorls five, their sides nearly straight, ex-
cept those of the body whorl which slope convexly to the round-
ed base; peritome discontinuous, outer lip thin, slightly pro-
duced anteriorly; aperture wide; fold of columella prominent.
Length of shell 2.5; of body whorl 1.50; of aperture .90; greatest
diameter 1.15 mm.

Locality. — (Exp’d’t6) Bluff 3, Cercado de Mao.

Odostomia yaqguica, n. sp.
Plate 25, Figure 22

Shell minute, with about seven whorls more or less flattened
except the last which is slightly convex; suture distinct, some-
what channeled by the beveled anterior edge of the volution; base
of last whorl rounded; aperture ovate to quadrate; outer lip sim-

B52 BULLETIN 29

ies)
bt
GN

ple; the single columellar plication large and sharp. Length of
shell 3.50, of body whorl 1.75, of aperture 1; greatest diameter
I mm.

Locality. (Exp’d ’16) Bluff 3, Cercado de Mao.

SUBORDER SCUTIBRANCHIATA

A. SUPER-FAMILYV RHIPIDOGLOSSA
Genus NERITINA Lamarck

Neritina (Puperita) figulopicta, n. sp.
Plate 24, Figure Io

Shell small, smooth, opaque, white, painted with an open ir-
regularly reticulated design embellished with series of parallel
dashes, producing the effect of a design on Indian pottery; spire
apparently characteristically eroded; aperture semi-lunar; outer
lip thin; inner lip with a heavy, expanded, platform-like callus,
finely crenulate on its free edge. Greatest diameter of shell 8,
greatest thickness 5 mm.

This shell is probably the ancestor of WV. pupa Linné living
in the West Indies; but differs markedly in the platform-like
callus.

Localtty.—(Exp’d °’16) Gravels of the Rio Cana near
Caimito.

Neritina (Smaragdia) viridemaris, n. sp.
Plate 24, Figure 11

Neritina viridis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242, 1873.
Not WV. viridis Linné.

Shell small, delicate, color pale sea green painted with par-
allel, black lightning-like flashes, straight and zigzag;form some-
what oblique; spire depressed; suture distinct; whorls three,
the last convex, slightly shouldered; aperture wide, produced an-

317 DoMINICAN Fossiis-—-MaAuRyY 153

teriorly; outer lip thin; inner lip with a thick callus, the free edge
of which may be very minutely crenulate. Greatest diameter of
shell 8, greatest thickness 3.25 mm.

This attractive shell is the precursor of NV. viridis living in
the West Indies; but the fossil is smaller and its color scheme
very different. We collected over a hundred specimens all with
the same design, showingit to be quite constant.

Locality. —(Exp’d’16) Bluff 2, (rare); Bluff 3, (abundant),
Cercado de Mao.

Genus PHASIANELLA Lamarck
Phastanella punctata Gabb
Plate 24. Figures 12, 13

Lacuna punctata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240, 1873.

Characterized by microscopic, opaque white spots on a quin-
cunx plan upon a semi-translucent ground.

The genus Lacuna is chiefly Arcticin its present distribu-
tion. The affinities of the fossil seem rather with Phaszanella
tessallata (living on the Monte Cristi beach), which is spotted and
more or less umbilicated? This would harmonize with Gabb’s
remark, ‘‘It is living in the West Indies but I cannot find it de-
scribed’’.

Localities.—(Exp’d ’16) Bluff 2 (rather rare), Bluff 3
(abundant), Cercado de Mao.

Genus Turso Linné
Turbo crenulatoides, n. sp.

Plate 24, Figure 14
Cf. Turbo castaneus Guppy, Quart. Jour. Geol. Soc., London, vol. 22,
p. 291, 18€6; Geol. Mag. London, p. 441, 1874.
Cf. Turbo near crenulatus Dall, Trans. Wagner Inst. Sci., vol. 3, pt.
6, p. 1585, 1903.
Shell resembling Kiener’s figure of 7Z. crenulatus Gmelin
(Kiener, Cog. Viv. vol. 9, pl. 27, fig. 1) but the entire orna-

154 BULLETIN 29 318

mentation is formed of squamose plates, crenate or vaulted.
Whorls about six, convex anteriorly, flattened posteriorly, the

angle on the shoulder being marked by a conspicuous row of
vaulted squames of which there are eighteen on the last whorl.
Above and below this the whorls are sculptured with crenate
spirals, usually alternating in strength and tending to become
nodular on the base. Length of largest specimen 30, width
23 mm.

Localities. —(Exp’d ’16) Zone B, Rio Gurabo; Zone H, Rio
Cana.

Turbo dominicensts variety Laloz, n. var.
Plate 24, Figure 15

Shell imperforate with six angulated whorls; on the last are
fifteen larger and six smaller revolving, rounded ribs, 21 in all.
The most conspicuous is the beaded rib beneath the suture, an-
terior to it on the last whorl are three other smaller, beaded
spirals and among them two very fine beaded threads, all being
on the flattened posterior part of the whorl, the ribs elsewhere
are not beaded. Length 23, width 18 mm. This shell differs
from Gabb’s description of his unfigured 7: domdnticensis in the
angulated whorls and limited number of beaded spirals.

Localities —(Exp’d’16) Bluff 2, Cercado de Mao; Zone G,
Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito.

Genus ASTRALIUM Link

Astralium sublongispinum, Nn. sp.
Plate 24, Figures 16, 17
Astralium longispinum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242,
1873. Not Zrochus longispina Lamarck.

Shell resembling recent 4. longispbinum but with much finer,
more even and oblique sculpture above, and more numerous,
finer spirals beneath, the early whorls are not flattened as in the
recent shell. The recent species is doubtless the descendant and

319 DOMINICAN Fossits—Maury 155

abounds on the Monte Cristi beach, showing many variations.
Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Not
rare).

Astralium Karlschmidti, n. sp.

Plate 24, Figure 18

Shell high, trochiform, imperforate, whorls about five, slight-
ly concave, carinated at the periphery which bears about thirteen
short, dentate spines. Surface of whorls sculptured with many
close-set, very regular, fine, oblique threads, cut by three or four
impressed spiral lines near the margins of the whorls. Under
surface of shell with very numerous, fine spiral threads crossed
by still finer radial stricee. Altitude of largest shell 15, greatest
diameter 18 mm.

Localities.—(Exp’d ’16)—Bluff 3, Cercado de Mao; Zones
H and I, Rio Cana at Caimito.

Genus CALLIOSTOMA Swainson

Calliostoma Grabaut, n. sp.

Plate 24, Figure 19

Shell pyramidal, pearly and iridescent beneath the surface,
whorls eight, ornamented with four or five stronger, sharply cre-
nate, spiral threads and among them two or three much finer,
beaded lines; whoris slightly convex, excavated a little at the
suture so that the sides of the shell do not not form an uninter-
rupted line from the base to the apex; periphery rounded, base
convex, perforate, ornamented with ten narrow, spiral ridges,
the wider interstices being strongly sculptured by lines ofgrowth.
Altitude 18, diameter 19 mm.

This rareand handsome Cadliostomais named in honor of
Professor Amadeus Grabau of Columbia University as a token of
regard.

Localities.—(Exp’d °16) The Samba Hills, about halfway

156 BULLETIN 29 : 320

down the southern slope, on the road from Rompino to Los Cao-
bas; also Zone G, Rio Gurabo at Los Quemados.

Genus VITRINELLA C. B. Adams

Vitvinella (Circulus) striata Gabb

Plate 24, Figure 23
Cyclostrema striata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242. 1873.
Our specimens correspond to Gabb’s description of this unfig-
ured species, and appear to be identical. We have referred the
species to the section Czrvculus Jeffreys as redefined by Miss Bush.
Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (Common.)

Genus TEINostomsA A. Adams

Teinostoma sandomingenseé, 0. sp.

Plate 24, Figure 24

Shell small, orbicular, flattened, smooth and _ polished,
marked only by delicate growth-lines; spire somewhat concealed,
periphery convex, very slightly carinate; outer lip sharp; umbilt-
cal region covered by a large flat callus; aperture sub-circular;
oblique, receding beneath. Diameter 4, altitude 1.54 mm. This
species is related to 7. xanum, from the Maryland Miocene and
is also akin to the recent 7. cryptospira Verrill.

Locality.— (Exp’d ’16) Bluff 3, Cercado de Mao. (Very
rare. ) :

Genus Discopsis de Folin
Discopsis Derby, n. sp.
Plate 24, Figure 20
Shell minute, spire depressed, whorls four; upper surface
very finely, microscopically, spirally striated,.and marked at in-
tervals by faint, curved lines of growth, last whorl flanged by a

very strong rounded carina revolving around the shell just be-
neath the periphery; base convex, ornamented with eight very

321 DOMINICAN FossiLts—-MAURY 157

strong, sharp-edged, curved, radial plications; aperture oblique,
receding below, sagittate, the outer lip being produced into a
very conspicuous point; the cord-like umbilical callus is continu-
ous with the thickening of the margin of the lip and descends into
the umbilicus. This species hasa general resemblance to the
Floridian Pliocene 7. calliglyptum Dall and to the recent D.
Schumoz Vanatta from the British Honduras. Greatest diameter
4mm.

This rare and curiously beautiful shell is named as a tribute
to the memory of Dr. Orville A. Derby, lately Director of the
Servico Geologico do Brazil, who for over two score years knew of
no sacrifice too great to advance the knowledge of the palzeontol-
ogy of his adopted land.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (A sin-
gle shell).

Genus FissuRIDEA Swainson
fissuridea flenekent, n. sp.
Plate 24, Figure 21

Shell resembling /. alfernata Say but differing in the orna-
mentation, the concentric laminze being raised into hollow vault-
ed scales and tubes as they cross the radiating ribs. An exam-
ination of many specimens of /. alternata shows some shells have
crenulated scales but none show the hollow tubular structure
characteristic of the fossil shell. Asin /. alternata every fourth
rib is stronger; the perforation is in front of the middle of the
shell, and is keyhole-shaped; the anterior slope is slightly convex,
the posterior slope slightly concave. Length 19, breadth 12, al-
titude 7 mm.

Dedicated to the memory of Colonel Heneken, who made the
first collection of fossils and the first sectionsof the Tertiary
formations of the Rio Yaqui.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito.
(A single shell. )

Fissuridea alternata Say

Plate 24, Figure 22
Fissurella alternata Say, Jour. Acad. Nat. Sci. Phila., rst ser. vol. 2,

158 BULLETIN 29 322

p. 224.

Lucapina alternata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244,

1873.

Our shells are slightly laterally compressed and narrower, but
otherwise appear identical with F. alternata from the Carolina
coast.

Locality. —(Exp’d’16) Bluff 3, Cercado de Mao (Not
common).

CEASsS, SCArPAOPrOm,

Genus DeNTALIUM Linné

Dentalium disstmile Guppy
Plate 26, Figure I

Dentalium dissimile Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 292,
pl. 17, fig. 4, 1866.
Cf. Dentalium dissimile Gabb, Trans. Amer. Phil. Soc., vol. 15, p.

244, 1873.
Dentalium dissimile Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila.,

Vol. /49,.p-.469, pl. 11. figs. 3,4, 15, 1897.

Dentalium dissimile Pilsbry, /dem,,vol. 63, p. 136, Tort.

Shell with a quadrangular, finely striate apex, becoming
smooth, round and shining near the aperture. The type locality
is Jamaica.

Localities.—(Exp’d’16) Bluffs 2 and 3, Cercado de Mao;
Zone G, Rio Gurabo at Los Quemados.

Dentalium dissimile variety ponderosum Gabb
Plate 26, Figure 2

Dentalium ponderosum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244,

1873.
Dentalinm dissimile var. ponderosum Pilsbry and Sharp, Proc. Acad

Nat. Sci. Phila., vol. 49, p. 470, pl. 10, figs. 1, 2, 3; pl. II. figs. 15
16, 1897.
This large, common species often becomes so thickened in-
ternally that the cavity becomes a mere perforation.

323 DoMINICAN FossiLts—MAvuRY 159

Localities—(Exp’d’16) Bluff 2, Cercado de Mao (Very
abundant); Zone G, Rio Gurabo at Los Quemados.

Dentalium Cossmannianum Pilsbry and Sharp
Plate 26, Figure 3

Dentalium dissimile variety Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
224, 1873.
Dentalium Cossmannianum Pilsbry and Sharp, Proc. Acad. Nat. Sci.
Phila., vol. 49, p. 467, pl, 10, fig. 11; pl. 11, figs. 10, 11, 1897.
This is differentiated from our other Dominican shells of the
genus by its six longitudinal ridges. Collected by Gabb in

Santo Domingo (C. U. Museum No. 7630).

Dentalium glaucoterrarum, n. sp.
Plate 26, Figure 4

Shell with eight equal, distinct, raised longitudinal ribs, in-
tervals slightly convex, marked by irregularly spaced circular
growth lines; interstitial riblets entirely absent or extremely
weak. Length of fragment 23, diameter of larger end 4, of small-
er 3 mm.

This species resembles D. Cossmannianum, but has eight in-
stead of six ribs. Inasmuch as in recent Deztalia the number of
ribs is an important character of classification and six and eight
ribbed forms are referred to different groups, our fossil would ap-
pear to a distinct species.

Locality —(Exp’d’16) Zone E, Rio Gurabo at Los Que-
mados.

Dentalium haytense Gabb
Dentalium Haytensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244,

1873.
Dentalium haytense Pilsbry and Sharp, Proc. Acad. Nat. Sci., Phila-

vol, 49, p. 471, pl. 11, figs. 8, 9, 1897.

We have a number of very smooth, shining, tapering Den-
talia which seem to be this species. No perfect shell has ever
yet been found.

Locality,— (Exp’d ’16) Bluff 3, Cercado de Mao.

160 BULLETIN 29

a)
S
“>

Genus Capuus Philippi

Cadulus phenax Pilsbry and Sharp
Pilate 26, Figure 5
Gadus domingensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15,

P- 245, 1873.
Cadulus phenax Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila., vol.

49, p. 472, pl. 11, figs. 23, 24, 1897.
We found hundreds of this delicate little shell in the bluffs
of the Mao River. C. dentalinus is the Bowden analogue.

Localities.—(Exp’d ’16) Bluff 2 (comparatively scarce), Bluff
3 (very abundant), Cercado de Mao.

Cadulus elegantissimus Pilsbry and Sharp

Plate 26, Figure 6
Gadus domingensis Gabb (in part), Trans. Amer.. Phil, Soc., vol. 15,
Pp, 246, 1873.
Cadulus elegantissimus Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila.,
vol. 49, p. 473, pl. 11, figs. 28-30, 1897.
We collected over fifty shells of this species which resembles
C. phenax but is nearly twiceas large. The two occur together
in the same bluffs.
Localities.—(Exp’d ’16) Bluff 2 (comparatively scarce),
Bluff 3, (common), Cercado de Mao; Zone H, Rio Cana at
Caimito.

Cadulus denticulus-tigris, n. sp.
Plate 26, Figure 7

Shell small, polished, smooth, shaped precisely like a minia-
ture tiger’s canine tooth; greatest diameter sub-central, thence
tapering towards either extremity; apex minute circular; aper-
ture somewhat larger, sub-circular. Length of shell 6.25, great-
est diameter 1.75 mm.

A very rare species, quite different from any fossil Cadulus
described from Santo Domingo or Bowden.

Locality.—(Exp’d ’16) Zone G, Rio Gurabo at Los Que-
mados.

325 - DOMINICAN FossiLs-—MAuURY 161

CLASS te Ewer PODA
ORDER PRIONODESMACEA

Genus Nucura Lamarck

Nucula tenuisculpta Gabb
Plate 26, Figure 8
Nucula tenuisculpta Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 255,
1873.

Shell oblique, roundly triangular, surface highly polished as
though veneered; marked with faint, microscopic radiating lines,
inner margin crenulated. Length of largest shell 4, altitude 3
mm. This rather rare species is now figured for the first time.

Locality.— (Exp’d 716) Bluff 3, Cercado de Mao.

Genus LEDA Schumacher
Leda pettella Dall

Plate 26, Figure 9

Leda acuta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 255, 1873. Not
L. acuta Conrad 1832, nor Sowerby 1837.

Leda peltella Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 579, pl.
32, fig. 5; pt. 6, p. 1586, 1903.

We collected great numbers of this species, literally thou -
sands of shells, in Bluff 3. Our largest specimens attain the
length of 8 mm., given by Gabb and Dall, but the great major-
ity are about 6mm. Wehave them, however, of all sizes and
ages. The anterior and posterior sulcations shown in Dr. Dall’s
handsome illustration of the Jamaican shell are sometimes con-
spicuous, but often hardly apparent in our shells, yet all seem
to be the same species and identical with the Bowden form.

Localities, —(Exp’d’16) Bluff 2 (not very common), Bluff
3 (extremely abundant), Cercado de Mao; Zone I (rather
scarce), Rio Cana at Caimito; Zone G (rare), Rio Gurabo at Los
Quemados.

162 BULLETIN 209 326

Genus Limopsis Sassi
Limopsis ovalis Gabb
Plate 26, Figure ro
“imopsis ovalis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 255, 1873.
Limopsts ovalis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 607,
1898.

We collected a single rather worn valve of a Lzmopsts which
corresponds to Gabb’s description of his unfigured Dominican
species ovalis. Itis somewhat larger than the type and appears
to be an aged shell, showing to a marked degree the oblique out-
line characteristic of this species on growing older. Greatest
length 8.5, altitude 7.5 mm.

Guppy’s LZ. subangularis from Trinidad has a much squarer
dorsal outline, more prominent beaks, and the ribbing is stronger
than the concentric lines. In ovalés the ribbing is much feebler
than the concentric lines.

Locality —(Exp’d’16) Between Hato Viejo and Potrero,
Rio Amina.

Limopsis hatoviejonts, n. sp.
Plate 26, Figure 11

Shell resembling in form ZL. subangularis from Pointapier,
Trinidad, but more elegantly sculptured, and with four strong
hinge teeth in both anterior and posterior series with sometimes
a weak fifth tooth, while subangularis has only about three in
each series. The outline is suborbicular, somewhat oblique;
hinge line very straight, not sloping as in ovadis; right and left
valves equal but the sculpture slightly discrepant, the radials be-
ing stronger on the right valve. Concentric sculpture stronger than
indicated in subangularis and consisting of thick, rounded, close-
set, cord-like ridges, with much narrower interspaces, the latter
almost linear; radials delicate but sharp, thread-like, with much
wider interspaces; the radials are waved in crossing over the con-
centric cords. The inner margin of the valves is crenulated by

347 DOMINICAN FossiLs—MAuRyY 163

the radials. Ligament pit small, triangular, dividing the teeth
into an anterior and posterior series; teeth irregular, the anterior
nearly vertical, posterior very oblique. Length 7, altitude ap-
proximately 7mm. A rare and exquisite little shell.

Locality.—(Exp’d ’16) Between Hato Viejo and Potrero,
Rio Amina.

Genus Arca Linné

Dr. Pearl Sheldon, whose fine Monograph on Atlantic Slope
Arcas has lately appeared, has very kindly examined our Santo
Domingo Arks, and discriminated most carefully between the
species, the majority of which are new. Her expert and inti-
mate knowledge of the genus gives to these discriminations a high
value.

Arca occidentalis Philippi
Plate 29, Figure 3
Arca occidentalis Philippi, Abbild. u. Beschr., 3, p. 14, pl. 17b, fig.
4a-c, 1847.

Arca noe Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 293, 1866.

Arca occidentalis Guppy, Zd., vol. 32, p. 531, 1876.

Arca occidentalis Sheldon, Palzont.. Amer., vol. 1, p.8, pl. 1, figs.

8-II, 1916.

Our fossils from the bluffs seem identical in every respect
with recent shells of this species from the Monte Cristi beach.
The species has beenreported from Bowden, and is widespread
in the Pleistocene and recent Antillean faunas.

Localities.—(Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados; Zone H, Rio Cana at Caimito.

Arca umbonata Lamarck
Plate 30, Figure 11

Arca umbonata Lamarck, An. s. Vert., vol. 6, p. 37, 1819.
Arca imbricata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p.
254, 1873.

154 BULLETIN 29 328

Arca umbonata Sheldon, Paleeont. Amer., vol. 1, p. 8, pl. 1, figs. 12-17,
1916.

Our fossil shell is exactly like the recent from the Monte
Cristi beach but smaller. The species occurs in the Oligocene of
Florida and in the Antillean Pleistocene and recent faunas, but
has not been found at Bowden.

Locality: -(Expid'16,)\ Zone) HW, Rio Cana at. Cainito,

Arca lomasdesaiiba, 1. sp.
Plate 30, Figure 12,

Shell resembling in general form the young of A. occidentalis,
but the ribs are more uniform and more nodulous. The whole
plan of sculpture is more elegant. A. occidentalis characteristic-
ally has a nearly smooth band (with a group of fine threads)
over the umbonal ridge, and another similar band along the pos-
terior dorsal margin; between these bands is a pronounced sulcus
containing a few normal ribs. The specimen now described
shows only very slight development of bands, and the sulcus is
much less pronounced. Length of shell 32, altitude 14, thick-
ness, of both valves 14 mm.

The Chipola analogue is 4. paratina Dall, which is smaller,
with much finer ribbing.

Locality. —(Exp’d’16) Samba Hills, altitude approximately
540 feet.

Arca yaquensis, n. sp.
Plate 30, Figure 14

We have about sixteen valves of a minute, true Ark with-
out special characters, but apparently not the young of any
other species. It is not alate, but is obliquely truncate poster-
iorly, and there is no differentiation of the ribs over the rounded,
not angular, umbonal ridge. Exteriorly the shell somewhat re-
sembles a Scapharca. Perhaps the shell is not quite mature,
~ince the margin is still crenulate. Length 9, altitude 4.75 mm

Printed April 9, 1917

329 DOMINICAN Fossi.s—MAURY 165

Localities—(Exp’d’16) Bluffs 2 and 3, Cercado de Mao;
Zone I, Rio Cana at Caimito.

Subgenus BARBATIA Gray
Barbatia of. Bonaczyt Gabb
Plate 30, Figure 15

We have a number of valves of a small, thin Barbatia which
is either the unfigured B. Bonaczyi Gabb or new. Dall has
united Gabb’s species with A. umbonata, a true Ark; but the
main point of Gabb’s indefinite description seems to be that this
species is nearest &. barbata, but has a more produced and
sloping posterior end. Ours is only half as large but may not be
adult.

Cardinal area as in B. barbaia, ends of the hinge more an-
cular; teeth with a short vacant gap between the short anterior
and long posterior series; beaks within the anterior fourth;
sculpture anterior to the umbonal ridge of fine, beaded, radial rib-
lets, anteriorly more widely spaced at intervals, giving the ribs a
grouped appearance as in B. barbata,; umbonal ridge more marked
than in darbata,; posterior ribs larger, dominating the concentric
sculpture which is prominent on the face; a group of fine ribs
lies next the hinge; shell produced and pointed along the um-
bonal ridge; posterior margin oblique. Length 18, altitude ro,
semi-diameter 3 mm.

We have a larger valve from the Samba Hills which may
be a variation of this species, but it is thicker, the beaks are less
anterior, the cardinal area wider, and the teeth are shortest near
the middle, growing evenly longer distally, and there is no gap.

Locahities.—(Exp’d’16) Zone D, Rio Gurabo at Los Que-
mados; Samba Hills at approximately 540 feet altitude.

Barbatia (Calloarca) submarylandica, n. sp.

We found several fragments of a large Avca of the A. can-
dida group, but not that species because the characteristic large

166 BULLETIN 29 230

anterior and posterior ribs are lacking. In the shell described
the ribs on the anterior and posterior slopes are no larger than
on the rest of the valve. The ribbing is almost identical with
that of A. marylandica Conrad, which is typical of the Maryland
Miocene, but also occurs in the Oligocene Tampa silex bed. As
exceedingly few species are common to the latter horizon and to
the blue clays of Santo Domingo an absolute specific identity
seems, however, improbable.

Localities. —(Exp’d ’16) Guayubin to. Mao road; Zone H,
Rio Cana at Caimito.

Barbatia (Acar) reticulata Gmelin
Plate 30, Figure 16

Arce reticulata Gmelin, Syst. Nat., vol. 6, p. 3311, 1792.

Arcr reticulata Sheldon, Paleeontographica Americana, vol. I, p. 20,

pl. 4, figs. 8-12, r9Té.

This richly sculptured Ark is very rarein the Dominican
blue clays, in which it has never before been found. It occurs as
a fossil at Bowden, Matura (Trinidad), Tampa silex bed, Chip-
ola marls and elsewhere and is now living in the Antilles.

Locality.—(Exp'd '16) Bluff 3, Cercado de Mao. (A single
valve).

Subgenus Norrra Gray
SECTION SHELDONELLA, new section
Noétia (Sheldonella) maotca, n. sp.
Plate 30, Figures 17, 18

Shell small, thin; sculpture as in JV. zzczle or typical /zmula,
hinge and cardinal area as in /Voétia; the anterior half of the
ligament area with transverse grooves; ligament area extending
about half way from the beaks to the posterior end of the hinge;
inner margin crenulated; posterior margin with an angle near
the hinge asin WV. dzsulcata and typical “mula; shell probably
equivalve. The striking feature of this shell is its form. The
umbonal ridge is not angular as in the rest of the Voéte, but

23r DoMINICAN Fossi1rs—MAuRY 167

that region is roundly and excessively inflated. The outline is
trigonal, the anterior part very small, with beaks at the anterior
fifth, posterior part widely spreading. A sinus extends to the
well developed notch in the anterior ventral margin. Length 12,
altitude beak to base 6, posterior altitude 13.50, semi-diameter
4mm.

The general appearance of this shell recalls some of the deep
water species like Bathyarca pectunculoides, B. culelrvensis, Cu-
cullaria asperula, and C. sagrinata although thereis no gap in
the teeth as in many such forms. Because of the variation from
typical Voétza, and the possible analogue with deep water forms,
it seems best to establish for it the new section Sheldonella to
contain thin, small, trigonal Voétias without the angular umbon-
al ridge.

Locality.—(Hxp’d ’16) Bluff 3, Cercado de Mao (Extreme-
ly abundant).

Subgenus SCAPHARA Gray
Scapharca Flenekeni, n. sp.
Plate 29, Figure 2
Arca consobrina Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p.
52. pl. Io, fig. 12, 1849.
Not Arca consobrina d’Orbigny, Pal. Francaise, Terr. Crétacés, vol. 3,
p- 209, pl. 311, figs. 4-7, 1844.
Arca consobrina Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
531, 1876.
Arca consobrina Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p, 646,
1898. (

Arca consobrina Sheldon, Paleont, Amer., vol. 1, p. 49, 1916.

As Dr. Dall and others have pointed out, Sowerby’s name
is preoccupied. The writer would suggest as a new name ene-
kent, in honor of Colonel Heneken by whom the type was col-
lected.

This Scapharca belongs to a group comprising many species
of which hypomela, lienosa, secticostata, and halidonata are well-
known members. The principal feature of the species is its
grooved and beaded ribs, numbering thirty-five or thirty-six; the

168 BULLETIN 29 332

anterior ribs show a deep medial groove extending well up towards
the beaks, and on each side of this a shallower groove; the cen-
tral ribs just anterior to the umbonal ridge have several longi-
tudinal grooves; the ribs of the posterior slope beginning near
the angle of the umbonal ridge are flatter, nearly smooth, and
little sulcate. The ribs are wider than the interspaces and
crossed by concentric raised lines which produce a beaded appear-
ance especially near the center of the shell. Compared with
other West Indian species of the same group it is distinguished
by its oblong form, base nearly parallel to the hinge, and less
produced umbonal ridge. Length 50, altitude 29, thickness of
one valve 15 mm.

fide Dall, Guppy’s A. consobrina from Jamaica is halidonata
Dall, which is shorter and higher, with a more arcuate base.

Localities.—(Exp’d’16) Bluff 2, Cercado de Mao; Zone B,
Rio Gurabo at Los Quemados. Valves probably young of this
species were found in Bluff 3, Cereado de Mao and on the Samba
Hills at approximately 540 feet altitude.

Scapharca golfoyaquensis, n. sp.
Plate 28, Figure 5

This is another member of the group to which A. Henekent
belongs. The ribs number thirty-eight and the ribbing is nearly
the same, but the central ribs appear to be narrower and less
divided. The central ribs of the left valve are conspicuously
beaded while those of the right valve are smoother, flatter and
more square, whether the latter character is true of Wenekent we
do not know as all our valves are left. The chief difference be-
tween 4. Henekent and golfoyaquensts lies in the form, the latter
species being conspicuously and constantly much more produced
and pointed posteriorly, the beaks are fuller and more anterior.
Instead of being oblong the shell is broad posteriorly and narrow
anteriorly ; cardinal area long and moderately wide, with a few
concentric grooves; hinge line long with numerous vertical teeth
somewhat oblique at the posterior end of the series. Length 59,
altitude 31, thickness of one valve 16 mm.

233 DoMINICAN FossiILs—MAURY 169

Localities —(Exp’d’16) Zones B, F, G, Rio Gurabo at Los
Quemados; Zone H, Rio Cana at Caimito; Bluff 1, Cercado de
Mao.

Scapharca cercadica, n. sp.
Plate 29, Figure 5

Sheil thin and fragile for the group; elegantly and finely
sculptured; anterior margin rounded, apparently meeting the
hinge at an angle but both ends of the hinge are broken in our
single specimen; basal margin nearly straight and parallel to the
hinge; posterior margin oblique, not straight but slightly sinuous
above, as shown by the growth-lines, and broadly, evenly and
gracefully curving into the ventral margin; ribs thirty-four, wider
than the interspaces, those anterior to the umbonal ridge very
evenly, dichotomously divided for nearly their entire length by a
sulcus two-thirds as wide as the interspaces; there are no second-
ary grooves except faint traces on the umbonal ridge; posterior
ribs smoother and flatter, with a less pronounced incised line;
ribs and interspaces crossed by fine, even, close-set, concentric
lines; hinge long and narrow, central portion broken. away, distal
teeth delicate and short, anterior vertical, posterior no larger
than the anterior, barely inclined. Length 50, altitude approxi-
mately 25 mim.

This rare and elegant Scapharca cannot be confused with
any of our other Dominican species.

Locality.—Exp’d ’16) Bluff 1, Cercado de Mao.

Scapharca Margarete, n. sp.
Plate 28, Figure 1

Shell large, oblong, solid, ribs thirty-one, entire, narrower
than the concave interspaces and flat-topped or slightly rounded;
ribs and interspaces crossed by fine, even, concentric threads
forming arches over the ribs and loops in the interspaces; the
ribbing is very similar to that of Anadara aresta and A. campsa,
from the Florida Miocene; some of the ribs distally show a mere
trace of a mesial groove; hinge line long with numerous teeth
nearly vertical except at the posterior end where they are some-

170 BULLETIN 29 334

what longer, slightly inclined and somewhat broken up; cardinal
area wide for the group, with about five concentric, somewhat ir-
regular grooves. Length 81, altitude 50, thickness of both
valves 49 mm.

This species is superficially somewhat like A. secticostata
Reeve, but the ribs in that species are deeply grooved.

Locality. —(Exp’d ’16) Rio Cana, Guayubin to Mao road.

Scapharca guayubinica, n. sp.
Plate 28, Figure 4; Plate 29, Figure 1

Shell ventricose, ribs twenty-nine; beaks mesially impressed;
cardinal area moderately wide with about four concentric grooves,
part of which do not extend ahead of a V-shaped groove connect-
‘ing the beaks, with the point turned backwards; hinge line long
with numerous teeth forming two series, the anterior vertical,
the posterior series about one and a half times as long, gradually
increasing in length posteriorly, the posterior teeth somewhat in-
clined. Length 45, altitude 31, diameter 29 mm.

This specles is very similar to A. Margarete excepting that
the hinge is comparatively wider and the shell only half as large.
Specimens in our Gabb collection appear to be mature and a
valve of ours from Rio Cana, 53 mm. in length, has every ap-
pearance of an aged shell, while 4. Margarete though twice as
large does not appear senile.

Locality.—(Exp’d’16) Rio Cana, Guayubin to Mao road.

Scapharca viogurabonica, n. sp.
’
Plate 29, Figure 4

We collected a number of similar valves identical with one
in the Gabb collection, which like the preceding was in Gabb’s
box of ‘‘Arca consobrina’’. This species is smaller than 4.
guayubinica and more produced along the umbonal ridge, with a
more marked angle between the posterior and ventral margins;
it is less inflated anteriorly. In A. guayubinica the anterior and
_ basal margins are distinct and meet in a broad curve, while in
the species now described the two tend to form a point near the

335 DOMINICAN Fosst_ts—MAvuRY 171

hinge to the posterior angle. The sculpture of this species is
more elegant, the undivided ribs, which number twenty-eight,
have more of a tendency to be rounded at the top; in two valves
which belong together the ribs of the left valve arerounded on
the center of the shell, while on the right valve they are square-
topped and less ornamented; this difference tends to occur also in
A, Margarete and guayubinica, but is more marked in vzogura-
bonica. Length ao, altitude 25, diameter 26 mm.

A complete series may prove this amutation of 4. guayu-
bintca characteristic of the Rio Gurabo.

Locality.—(Exp’d ’16) Zones A and B, Rio Gurabo at Los
Quemados.

Scapharca ineguilateralis, Guppy

Plate 30, Figure 8

Arca inequilateralis Guppy, Quart. Jour. Geol. Soc., London, vol. 32,
p. 293, pl. 18, fig. 2, 1866.
Scapharca (Scapharca) inequilateralts Dall, Trans. Wagner Inst. Sci.,

vol. 3, pt. 4, p. 647, 1898.

Arca ineqguilateralis Sheldon, Paleeont, Amer., vol. I, p. 50, 1917.

A comparison of our specimens from the Guayubin to Mao
road, Rio Cana, with A. /atidentata Dall from the Chipolan beds,
Florida, shows that Dr. Dall’s remarks are very fitting. <A. zn-
equilateralis can be distinguished from its Floridian analogue by
the shorter, more delicate and much more numerous hinge teeth,
less inflated form, and more elegant sculpture. Length 29, alti-
tude 15, semidiameter 6 mm. This pretty, delicate dvca occurs
at Bowden but has never before been found in Santo Domingo.

We have a number of specimens from the Gurabo and Cana
Rios which apparently belong to this species, but are uniformly
more solid and inflated. A large valve measures 29 in length, 15
in altitude, semidiameter 7 mm.

Localities—(Exp’d ’16) Guayubin to Mao road, Rio Cana;
Zone I, Rio Cana at Caimito; Zone G, Rio Gurabo at Los Que-
mados.

72 BULLETIN 29 336

Scapharca losquemadica. n. sp.
Plate 30, Figure 1

We collected three left valves of an A7vca resembling A. zn-
equilaterals and A. dariensts. Ribs about thirty, the anterior
sulcated and wider than the interspaces, anterior central ribs
high, rounded and very narrow; posterior central ribs larger,
higher, rounded, somewhat sulcated; posterior ribs beginning at,
or somewhat anterior to, the umbonal ridge, wide, low, fiat and
square-topped with an incised groove; these posterior ribs are
smooth; the rest are nodulose. Hinge line long with an angle at
each end; teeth fine and numerous, vertical except at the pos-
terior end where they are somewhat inclined; cardinal area nar-
row, with a few grooves. Length 37, approximate altitude 20,
semidiameter8 mm. All the full grown shells are imperfect so a
voung shell has been figured.

This species should perhaps be classed as a variety of A. z7-
equuilateralis, but is much larger and the depth is proportionately
greater anteriorly. The ribbing is practically the same. Our
Shell is also akin to A. dariznszs Brown and Pilsbry from Gatun;
but the description of that species implies that the posterior as
well asthe anterior ribs are nodulose, and the posterior basal
curve is different.

Locality —(Exp’d’16) Zone E, Rio Gurabo at Los Que-
mados.

Scapharca caimitaca, n. sp.

Plate 30, Figure 13

This small species belongs to the groupof which A. trans-
versa in the recent representative. Ribs about thirty, narrow,
entire, rising sharply from the nearly equally wide, flat interspaces,
ribs triangular in cross section, with the medial line distinctly
angulated; both ribs and interspaces are crossed by concentric
lines which produce a moderate beading. The right valve is too
worn to show if its sculpture is similar to that of the left. Hinge
line about two-thirds the length of the shell; teeth small, verti-

337 DoMINICAN Fossi1s—-MAuRY 17a

cal, in two series of nearly equal length; cardinal area small, near-
_ly equilateral, with margins somewhat raised; grooves three;
beaks small, low, mesially impressed; shell ventricose, roundly
inflated; posterior margin evenly rounded, not truncate; anterior
and posterior margins meeting the hinge at an angle; inner mar-
gin of shell crenulate. Length 29, altitude 19, semidiameter
8.50 mm.
Locality.—(Exp’d ’16) Zone A, Rio Cana at Caimito.

Scapharca ctbaoica, n. sp.
Plate 30, Figure Io,

Shell rude, very small, thin, inflated, oblong, base sinuous,
nearly parallel to the hinge, anterior and posterior ends rounded;
peaks higher, narrower and more pointed than usualin shells of
this general form; a broad, well-developed sinus extends from the
beaks to the base; beaks at the anterior third; ribs twenty-two,
about as wide as the interspaces; low, flat, square-cornered and
without ornamentation, one or two secondary ribs may arise in
the interspaces in the sinus; cardinal area long and narrow, with
elevated margin behind the beaks, short and wider in front; hinge
narrow; teeth fine, vertical except at both ends where they are
longer and slightly inclined; inner margin crenulate. Length of
largest shell 11, altitude 7, semidiameter 4 mm.

This little shell is characterized by its rude sculpture, sub-
central sinus and narrow beaks.

Localities. —(Exp’d’16) Bluffs 2 and 3, Cercado de Mao;
Zone I, Rio Cana at Caimito.

Scapharca patricia Sowerby

Plate 27, Figure 1

Arca Patricia Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 52,
1849.

Arca patricia Moore, Quart. Jour. Geol. Soc., vol. 9, p. 129, 1853.

Arca (Anadara) grandis Gabb, Trans. Amer. Phil. Soc. vol. 15, p.
253, 1873.

Arca patricia Guppy, Geol. Mag. London, p. 443, 1874; Quart. Jour.
Geol. Soc., vol. 32, p. 531, 1876.

174 BULLETIN 29 338

Arca grandis Gabb (in part), Jour. Acad. Nat. Sci. Phila., vol. 8, sec.
ser., p. 378, 1874-1881.

Arca patricia Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, pp. 642,
658, 1898.

Arca patricia Sheldon, Palzeonto ographica Americana, vol. 1, p. 49,
1916.

This shell is exceedingly close to the West Coast 4. grandis.
Sowerby’s distinctions hold only for individual specimens. Gabb
confused the smaller related species, A. chiriguiensts, with the
young of 4. patricia. No one has recognized both these species.
sowerby had the larger (A. patricia) and Dall had the smaller
(A. chiriguizensts), while Gabb had both, but thought them the
same. This has been clearly elucidated by Dr. Sheldon. Guppy
reported A. patricea from the Caroni Series, Trinidad. This great
Ark has never heretofore been figured.

Localities —(Exp’d’ 16) Jn situ, 1st, 2d and 3d Se
cia beds, Caimito, Rio Cana (see section); loose at Sabaneta, and
very abundant in the lower reaches of the Rio Cana at the cross-
ing of the Mao to Guayubin road.

Scapharca chiriquiensts Gabb
Plate 28; Figure 2

Arca chiriquiensis Gabb, Proc. Acad. Nat. Sci. Phila., vol. 12, p. 567,
1861;

Arca grandis Gabb (in part) Jour. Acad. Nat. Sci. Phila., vol. 8, p.
378, 1874-1881. Exclude A. patricia and A. grandis.

Scapharca (Scapharca) chiriquiensts Dall, Trans. Wagner Inst. Sci.,
vol. 3, pt. 4, p. 642-643, 1808.

Arca chiriquiensis Sheldon, Paleeontographica Americana, vol. I, p. 49,
1916.

The Floridian shell, 4. staminata Dallhas a superficial re-
semblance to A. chiriguiensis but the real relationship of the Do-
minican fossil is with 4. patricia and the latter’s descendant, A.
grandis. _Arca chiriquiensts has been reported by Dall from the
Oligocene of Chiriqui, Central America, and from an island in
Lake Henriquillo, southern Santo Domingo.

Locality.—(Exp’d ’16) Sabaneta to Guayubin road (Abund-
ant and zz szfz).

339 DOMINICAN Fosstts—MAuRY 1

“I
At

Scapharca auriculata Lamarck
Plate 28, Figure 3
Arca auriculata Lamarck, An. s. Vert., vol. 6, p. 43, 1819.
Arca (Scapharca) auriculata Dall, Trans. Wagner Inst. Sci., vol. 3, pt.
4, p. 649, 1898; /d. pt. 6, p. 1586, 1903.
Arca auriculata Sheldon, Paleeontographica Amer., vol. 1, p. 50, pl.
II, fig. 19, 1916. aa
Cur fossil is identical in every respect with recent shells on
the Monte Cristi beach. A. auriculata occurs at Bowden and in
the Limon, Costa Rica, Pliocene. It is now reported for the first
time from the Dominican Tertiaries.
Locality.—(Exp’d’16) Sabaneta (loose, not 27 sztu).

Scapharca cor-cupidonts, n. sp.

Plate 30, Figures 5, 6, 7

Shell small, cordiform, solid, inequivalve, the left extending
considerably beyond the right; the posterior part of the shell is
short but the posterior margin is curved, not straight; anterior
and ventral margins rounded; shell roundly and excessively in-
flated. The ribs number very uniformly twenty-five, those of
the left valve do not vary much but the posterior are somewhat
smaller and those ending at the anterior ventral margin are larg-
est; the ribs are about as wide as the interspaces except anterior-
ly where they are more widely spaced, all the ribs of the left valve
are handsomely and evenly nodular; right valve with anterior
ribs nodulose as in the left, central ribs and those over the um-
bonal ridge narrow and smooth; ribs on the dorsal half of the
posterior slope nodulose. Beaks high,narrow, pointed, strongly
incurved and directed forward; cardinal area with a few grooves,
wide in front of the beaks, narrow, with a raised margin behind;
hinge line about two-thirds the length of the shell; teeth medium
in size, the posterior series about twice as long as the anterior,
teeth vertical except at the ends of the series where they are
slightly longer and oblique but not conspicuously so. Length 21,
altitude 21, diameter 21, a more inflated shell measures in

176 BULLETIN 29

length 21, altitude 24, diameter 24 mm. Avca filicata Guppy
from tne Manzanilla beds, Trinidad, appears to be similar to this
species.

Localities.—(Exp’d ’16) Bluff 2 (comparatively scarce),
Bluff 3 (exceedingly abundant and all ages) Cercado de Mao.

Scapharca hispaniolana, n. sp.
Plate 30, Figures 9, 10

In our Gabb collection there is a complete specimen, and
two left valves, of a form somewhat resembling A. cor-cuprdonis.
Like that, this species is inequivalve, small, solid and high, and
the beaks, cardinal area and hinge are similar. The left valve is
also handsomely nodulose, but the ribs, numbering twenty-five,
are wider than the interspaces and the anterior ribs are not so
widely spaced as those of cor-cupidonis; the ribs on the center of
the right valve are about as wide as the interspaces and are
somewhat less nodulose but of smooth and the discrepancy in
sculpture of the two valves is not marked; the umbonal ridge is
angular and there is a broad sulcation anterior and parallel to it.
Length 22, altitude 22, diameter 22 mm.

This species can be distinguished from A. cor-cupidonis by
its lack of discrepant sculpture, and by the umbonal ridge, angu-
lar instead of evenly rounded. Wecollected hundreds of the
former species but not one of this sort which Gabb must have
obtained from a locality we did not visit. This species closely
resembles in appearance 4. (Cunearca) Chemnitzt, which we col-
lected on the Monte Cristi beach, but the cardinal area of the
fossil is that of a true Scapharca. Our shell also has some re-
semblance to 4. chemnitzoides Maury from the Oligocene of Trin-
idad but#that, like Chemnitzi is a Cunearca.

Scapharca riocanensis, n. sp.
Plate 30, Figures 3, 4

Shell small, subquadrate, rather thin, roundly inflated; ribs
twenty-eight, style of ribbing almost precisely as in A. cor-cupid-

341 DOMINICAN FossiILs-—MAuURY D707,

ovis, discrepant on the two valves; anterior margin rounded, ex-
tending beyond the end of the hinge; ventral margin rounded;
posterior straight. Shell externally very like A. cor-cupidonts
but very much thinner, and that species has a sinuous posterior
margin, rather broadly rounded at the end of the umbonal ridge
while this shell has a straight posterior margin; is less rounded
at the base, and the posterior end of the hinge line is longer and
extends upward, giving the shell a winged appearance although
it is not alate as that term is used in the true Arks. In A. cor
cuptdonts the cardinal area is inclined upward from the top of the
hinge to the beaks making them appear high; in this species the
cardinal area is flat posteriorly and anteriorly slopes downward
from the hinge so that as seen from the interior the point of the
beak is about level with the upper margin of the hinge. The
beaks are also less twisted; exteriorly the beaks of both appear
high and narrow; the cardinal area in both has two or three
grooves and elevated margins; but the hinge of A. rzocanenszs is
longer, more markedly angled at the ends, and much narrower,
the teeth proportionately short and delicate. Length 25, altitude
23, semidiameter1t mm. This shell may attain a larger size-
Though superficially similar to A. cor-cupidonis it is really a very
different species.

Locality. (Exp’d ’16) Zone H, Rio Cana at Caimito.
(Not common).

Scapharca Pennelli Gabb
Plate 209, Figure 8

Judging from the specimens in our Gabb collection, Gabb
had two distinct forms confused in his species 4. Pennelli. It
seems best to limit that designation to the shell which fits his
description. As shown by the figure which is of one of Gabb’s
specimens, it is characteristically more oblique, thinner, and the
ribs less beaded than the other form which we have named S.
Arthurpennellt. A. Pennelli apparently is comparatively a rare
shell, the other species being the one which we found so abund-
ant.

178 BULLETIN 29 342

Scapharca Arthurpennelli, n. sp.
Plate 29, Figures 9, Io

This is probably the form which Gabb had in mind when he
spoke of the abundance of 4. Pennellz; but neither Gabb’s speci-
mens nor ours correspond to his description of that species. This
shell is not an Azadara since itis inequivalve. It is not very
oblique, and the left valve is handsomely beaded, though the
ribs of the right valve are smoother, the sculpture being some-
what discrepant. The ribs number thirty; the shell has a general
resemblance to the round, inflated, typical Argina campechensis
Dillwyn; but is more solid and the cardinal area is too wide for
Argina except in a few individuals. There are several grooves,
part of which extendin front of the beaks. The hinge is wide
with long, irregular teeth which somewhat resemble those of
Argina but are less abnormal. The species is intermediate be-
tween Scapharca and Argina. Many of the specimens, both ours
and Gabb’s, are characterized by a heavy callus at the anterior _
basal margin. Those individuals which have this to an extreme
form appear pathologic. Length 35, altitude 32, semidiameter
15mm. Besides hundreds of our own shells we have a large
number loaned by the American Museum, collected at Bulla
River (see sketch map).

Arca tolepia Dall appears to be similar to 4d. Arthurpennelli
but 1s described as thin, the sculpture of the right valve is differ-
ent from ours and the cardinal area is so narrow behind the beaks
that Dall placed the species in Avgzza. Our shell is remarkably
heavy and thick for its size and the cardinal area is too wide for
Argina.

Localities. —(Exp’d ’16) Bluff 2, Cercado de Mao (compara-
tively scarce); Bluff 3 (exceedingly abundant, all ages and sizes).

Scapharca (Argina) tolepia Dall
Arca pexata Guppy, Fide Dall, Geol. Mag. London, p. 443, 1874; Not
of Say 1822.
Scapharca (Argina) tolepia Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
Pp, 649, pl. 33, figs. 7, 8, 1898.

343 DOMINICAN Fossits—MAuRy 179

Scapharca (Argina) tolepia Sheldon, Paleeont. Amer., vol. I, p. 63,
pl. 15, figs. 14, 15, 1916.
This species is an Arxgina very close to the typical recent
canipechensis. The type locality is Rio Amina. It has also been
found at Bowden and Cumana.

Scapharca (Cunearca) Witlardaustent, n. sp.
Plate 29, Figures 6, 7

Shell inequivalve, thin, oblique, produced along the umbonal
ridge; teeth, hi ge and cardinal area as in Cunearca but the area
is rather long and narrow for the group, and sometimes marked
with one or two irregular grooves parallel to the hinge margin.
On both valves there are two shallow sulci, one as usual anterior
to the umbonal ridge, the other slightly anterior to the center of
the vaive, extending to the point on the ventral margin where the
extension of the left valve abruptly begins. Ribs about thirty-
six; those anterior to the median sulcus with transverse nodules;
all those posterior to this sulcus smooth on both valves; sculpture
nearly the same on both valves except that the smooth central
ribs on the face of the left valve are much wider than the inter-
spaces; while on the right little wider than the interspaces. Right
valve sometimes with an obscure interstitial line near the umbon-
al ridge. This species is separated from other Cuzearcas by its
oblique, produced posterior end and by the smooth ribs on the
face of the left valve. Itlacks to some degree the erect, well-
sculptured appearance usual in Cunearca. Length 42, altitude
32, semidiameter 14 mm.

A. cumanensis Dall from Bowden and Cumana is also a
member of the A. zxcongrua group but is much smaller, and is
short and high with high, prominent beaks while the reverse is
true in our shell.

I take great pleasure in naming this shell in honor of Mr.
Willard Austen, Librarian of Cornell University, in appreciation
of his so kindly facilitating the literary part of this investigation.

Locality—(Exp’d ’16) Zone H, Rio Cana at Caimito.

180 BULLETIN 29 344

Scapharca (Cunearca) cumanensis Dall

Arca incongrua Guppy, Proc. Sci. Assoc., Trinidad, p. 163, Dec.,
1867; Geol Mag. London, p. 451, 1874. Not A. tmcongrua Say.

Scapharca (Cunearca) cumanensis Dall, Trans. Wagner Inst. Sci.,
vol. 3, pt. 4, p. 633, 1898.

Described as a miniature 4. izcongrua but higher, shorter;
with more prominent and more anterior beaks, shorter hinge line;
ribs of posterior slope of right valve smooth instead of nodulose.
Length 26, altitude 25, diameter 21 mm.

Oligocene of Cumana (Guppy); island in Lake Henriquillo,
Southern Santo Domingo (Powell).

Note.—Gabb described an Arca multilineata from Santo —
Domingo. This shell is characterized by its thin, globose form
and sixty small, square ribs. Gabb likens it in some respects to
A. centenaria. We have no representative of 4. mutltilineata in
our collections and merely add this for completeness. 4. Webster
Brown and Pilsbry is an unfigured species from Haiti.

Genus GLYCIMERIS DaCosta

Glycimeris acuticostata Sowerby
Plate 26, Figure 12

Pectunculus acuticostatus Sowerby, Quart. Jour. Geol. Soc. London,
vol. 6, p. 53. pl. 10, fig. 13, 1849.

FPectunculus acuticostatus Guppy, /d., vol. 22, p. 293, 1866.

Axinea acuticostata Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 255,
1873.

Pectunculus acuticostatus Guppy, Quart. Jour. Geol. Soc. London, vol.
32, p. 532, 1876.

Glycymeris acuticostata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
p- 608, 1898.

Glycymeris acuticostata Brown and Pilsbry, Proc. Acad. Nat. Sci.
Biuila sp SOAry tole:

A common species in the blue clays; characterized by its

slightly oblique form and sculpture of thirty sharp, narrow, radi-
ating ribs with concave, often angulated, interspaces. Length

24, altitude 23, semidiameter 7mm. Also reported from Cu-

245 DOMINICAN FossiLts—-MAURY 181

mana, Bowden and Gatun.

Localities—(Exp’d ’16) Bluffs 1 and 2, Cercado de Mao;
Zones B and F, Rio Gurabo at Los Quemados; Samba Hills, ap-
proximate altitude 540 feet; trail Hato Viejo to Potrero, Rio
Amina.

Glycimeris jamaicensis Dall

Plate 26, Figure 13,

Pectunculus pennaceus Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 293, 1866. Not of Lamarck.

Axinea pennacea Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 255, 1873.

FPectunculus decussatus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 532,
1873. Not of Hanley.

Glycymeris jamatcensis Dall, Trans. Wagner Inst., vol. 3, pt. 4, p. 608,
1898: pt. 6, p. 1586, 1903.

We found this a rarer species than the preceding. It ap-
pears to be the ancestor of the Miocene-Recent G. pennacea La-
marck, which it closely resembles. The Bowden shell was differ-
entiated from the recent by Dr. Dall whose description applies to
our Dominican shells. The Gatun analogue is G. carbasina B.
and Pils.

Localities.— (Exp'd ’16) Zone I, Rio Cana at Caimito;
Zone G, Rio Gurabo at Los Quemados.

Genus PTERIA Scopoli

Pteria inornata Gabb

Plate 26, Figure 14

Avicula inornata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 253, 1873.
FPteria inornata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 669,
1808.

We have a large series of all ages and sizes of a Preria which
answers to Gabb’s description of this unfigured species. Con-
siderable variation is shown in {the size of the ears, the anterior
in some shells being unusually large. The outer layer of the
shell is generally worn off, leaving the nacreous under layer ex-
posed; but sometimes the outer remains and is prettily orna-

182 BULLETIN 29 346

mented by a series of wavy, concentric chestnut lines on a deep
cream background.

Localities.—(Exp’d’ 16) Bluff 3 (very common), Bluff 2
(very rare), Cercado de Mao.

Genus OstREA Linné

Ostrea haitensts Sowerby
Plate 31, Figures 1, 2
Ostrea Hattensis Sowerby, Quart. Jour. Geol. Soc., London, vol. 6, p.
53, 1849.
Ostrea Hlaytensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257,
1873.
Ostrea rane Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 532, 1876.
Ostrea haitensis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 685,
1898: pt. 6, p. 1586, 1903.

Sowerby’s type had only six or seven large plications, but
one of our specimens has as many as fourteen, but six are strong-
er than the rest. Our shell bears a marked resemblance to
Gabb’s Post-Pliocene Californian O. Veatchiz, which fide Gabb
and Dall is identical with the Dominican species. We havea
very fine, largespecimen of O. haztenszs, its length 122, altitude
140, semidiameter 25 mm. This species occurs at Bowden, and in
the Chipola and Oak Grove beds, Florida.

Localities—(Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados; Escalantes.

Ostrea Gilbertharrist, n. sp.

Plate 32, Figures 1, 2, 3

Shell large, thick and heavy, right valve deeper than the left
with a prominent, rounded, sub-central ridge extending from the
umbo halfway to the ventral margin, surface covered with irreg-
ular, concentric lamelle; not plicate radially; as seen from the
interior, the right valve bears two deep, concave, sinuous undula-
tions, one very broad, anterior, the other deeper, posterior; be-
tween the two is a convex, tongue-like prolongation of the poster-
ior basal margin; on the inside of the left valve these undulations
are reversed, there being two convex and one very deep concave

347 DoMINICAN Fossits—MAURY 183

fold so that the valves interlock as shown in the figure. The
hinge is remarkable for the presence of two equal and equidistant
pits on either side of the ligament pit. This condition may be
pathological but, as shown by the figure of the interior, it sug-
gests the multiple pits of Gervillia and Perna. Length 110, alti-
tude 120, diameter 60 mm.

Of the Ostreas in the Cornell collections this species most re-
sembles O. selleformis Conrad but that species is broad at
the hinge while ours is narrow and sloping. The peculiar sad-
dle-like undulations are, however, like those of the Eocene
species. Our shell is named in honor Of Professor Harris, with-
out whose encouragement and most effective aid on all sides, this
work would never have been done.

Locality.—(Exp’d ’16) Bluffs of Rio Gurabo.

Ostrea megodon Hanley
Plate 34, Figure 3

Ostrea megodon Hanley, Proc. Zool. Soc. London, p. 106, 1845.

Cf. Ostrea cerrosensis Gabb, Geol. Surv. California, vol. 2, p. 35, pl.
11, fig. 61, 1869.

Ostrea megodon Dall, Trans. Wagner Inst. Sci., vol. 3, Es Ay Os. leks,
1898; pt. 6, p. 1586, 1903.

A striking species, sickle-shaped, with four or five large,
marginal, tooth-like folds. Adult attached by the apex only, as
one of our shells clearly shows.

This species was founded on a recent shell from Peru in
Cuming’s collection. Gabb described a very similar shell from the
Californian Post-Pliocene as O. cerrosensts, which Dall united with
megodon. It is a curious and interesting fact that the two species
megodon and hattensts (or their descendants) should be found in
the Santo Domingo and Bowden beds andon Cerros Islands off
the Californian coast. It recalls the case of Venericardia plani-
costa, long extinct on the East coast but with the descendants of
migrants still livingon the West Coast. O. megodon is now re-
ported for the first time from the Dominican blue clays.

184 BULLETIN 29 248

Localities. —(Exp’d ’16)—Guayubin to Maoroad, and the
Teredo zone, Rio Cana at Caimito.

Ostrea virginica Gmelin

Ostrea virginica Gmelin, Syst. Nat., p. 3336, 1792.
Ostrea virginica Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257, 1873.
Ostrea virginica Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
532, 1876.
Ostrea virginica Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 687,
1898.
fide Dall, citations of this species from beds older than Plio-
cene are questionable. But our fossils so resemble specimens of
virginica that I follow Gabb and Guppy in referring them to
that species, at least tentatively.
Localities. —(Exp’d 16) Guayubin to Mao road, Rio Cana;
Samba Hills at an appromimate altitude of 540 feet; top of Zone
D, Rio Gurabo at Los Quemados; Bluff 3, Cercado de Mao.

Genus PEcTEN Muller

Pecten soror ? Gabb
Jantra soror Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257, 1873.
Pecten (fecten) soror Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
Pp. 712 1808.

Shell very inequivaive, right valve very convex, left con-
cave; ribs twenty to twenty-two, square, crossed by fine squa-
mose lines of growth. Length 48 mm. Gabb notes that this
unfigured species is allied to /. /acobeus, maxima and media but
differs from them all in the greater number and minutely squa-
mose character of its ribs.

Guppy reported the shell from Bowden and Cumana. The
type locality is Santo Domingo. We have a fragment that may
be this species but is too incomplete for positive identification.

Localitty.—(Exp’d’16) Bluff 1, Cercado de Mao.

Pecten eugrammatus Dall

Plate 34, Figure 4, 5
Pecten ( Pecten) eugrammatus Dall, Trans. Wagner Inst. Sci., vol. 3,
Pe 45 pa 72 plasay hes 22) 1S08:

349 DOMINICAN Fossiis-—MAURY 185

Shell suborbicular, very inequivalve, with about twenty radi-
ating, sharp ribs, each distinctly medially grooved, separated
by deep V-shaped interspaces; ears small, unequal; inner margin
of shell deeply fluted; right valve very convex, left much com-
pressed, nearly flat; with one or both edges of the ribs beauti-
fully squamose. Length ofa right valve 26, altitude 26, semi-
diameter 8; corresponding measures of a left valve 23X23X4
mm. The type was described only from a right valve. We
have ten left valves,—the first ever found. The edges of the ribs
of the right valves are smooth when worn, as in the type, but on
fresher shells they appear to be squamose as on the left valves.

Dr. Dall very kindly compared our shells with his type.

Localities—(Exp’d’16) Samba Hills at an altitude of ap-
proximately 540 feet (common). Zones B, F, Rio Gurabo at
Los Quemados; trail Hato Viejo to Potrero, Rio Amina.

Pecten (Aquipecten) Thetidis Sowerby
Plate 34, Figure 6

Pecten Thetidis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,
p. 52. 1849.

FPecten thetidis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 256, 1873.

Fecten thetidis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
532, 1876.

Peciten (4¢quipecten) thetidis Dall, Trans. Wagner Inst. Sci., vol. 3,
pt. 4, p. 714, 1898; pt. 6, p. 1586, 1903.

The type of this unfigured species was collected by Heneken
in the Yaqui Valley. We are indebted to Dr. Dall for compar-
ing our shells with his shells from Bowden which in turn were
compared with Sowerby’s type. The shell is orbicular, with
typically nineteen square ribs each with rows of minute spiny
squames; interstices in older shells also squamose; ears unequal,
with squamose radiating threads. Our largest specimen is 33
mm. in altitude, a small perfect shell measures 17 X 17, semidiam-
eter 4.25mm. Thespecies is also found at Bowden and on Cur-
acao.

Localities. —(Exp’d ’16) Zone I, Rio Cana at Caimito;
samba Hills at approximately 540 feet altitude.

186 BULLETIN 209 B=

Pecten (Atqutpecten) scissuratus Dall

FPecten ( 4-quipecten) scissuratus Dall, Trans. Wagner Inst., vol. 3, pt
4, p. 715, pl. 34, fig. 4, 1898.

Shell moderately compressed; valves nearly equilateral; ribs
sixteen; ears small, subequal. Altitude 31, length 30, diameter
6 mm.

Described from Ponton, Santo Domingo, and also found
near Colon, Isthmus of Darien.

Pecten vaginulus Dall

Plate 34, Figure 7

Fecien (Chlamys) ornatus Lamarck ? var. vaginulus Dall, Trans. Wag-

ner Inst. Sci., vol. 3, pt. 4, p. 715, 1898.

Our shell has been examined by Dr. Dall and pronounced
identical with the type of P. vagznulus, an unfigured species de-
scribed from Bowden. Our specimen has twenty- three ribs with
a distinct radial thread in every interspace; ears very unequal.
Length of right valve 15, altitude 16, semi-diameter 3 mm. This
species is smaller than Gabb’s P. zuterlineatus and has more
numerous ribs.

Locality.—(Exp’d’16) Samba Hills at an approximate alti-
tude of 540 feet.

Pecten (Chlamys) cactaceus Dall

Pecten ( Chiamys) cactaceus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
p, 716, pl. 34, fig. 2, 1898.

A thin, fragile shell, nearly equivalve, with ten to twelve
narrow ribs and wider shallow interspaces with radial threads;
whole surface squamose. Altitude 47, length 46, diameter 8 mm.
Reported by Dall from the Tertiary of Santo Domingo and the
Pliocene of Tehuantepec. It is simply mentioned here as one of
the few figured Dominican Pecfens, but is not represented in our
collections.

Pecten (Nodipecten) nodosus Linné

Pecten nodosus Linné, Syst. Nat., No. 164, 1758.
Pecten magnificus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 256, 1873.

ws)
a
Taal

DOMINICAN Fosst1sS—MAuRY 187

Not of Sowerby.
Pecten (Nodipecten) nodosus Dall, Trans. Wagner Inst. Sci., vol. 3,
pt. 4, p. 717, 1898.

We collected several imperfect shells resembling recent spec-
imens of P. zodosus from St. Thomas. The fossils show but few
of the characteristic hollow nodes; but their presence is also vari-
able in the recent shells.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito;
Limestone bluff, Rio Gurabo at Los Quemados.

Pecten excentricus Gabb

Plate 34, Figure 8
Pecten eccentricus Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 256,

1873.
Pecten (Plagioctenium) excentricus Dall, Trans. Wagner Inst. Sci.,

vol. 3, pt. 4, p. 717, 1898.

Shell with a general resemblance to ?. zvradians Lamarck,
but with broader, flatter ribs numbering twenty to twenty-two,
sometimes feebly grooved medially; interspaces concave; ribs and
interspaces with looped growth lines; ears‘small. Length of our
largest shell 38, altitude 35, semidiameter 11 mm. Gabb gives
25 to 38 for the length of the types.

Our shells appear to be this unfigured species as they accord
with Gabb’s description.

Localities. —(Exp’d ’16) Bluffs 1, 2 and 3, Cercado de Mao.

Pecten (Plagiocientum) Gabbi Dall

Pecten paranensis Gabb, Jour. Acad. Nat. Sci. Phila., sec. ser., vol.
8, p. 347, pl. 45, fig. 24, 1881. Not of d’Orbigny 1849.
Pecten ( Plagioctenium) Gabbi Dall, Trans. Wagner Inst. Sci., vol. 3,

pt. 4, p. 717, pl. 29, fig. 3, 1898.

“Shell broad, compressed, oblique, nearly #equivalve, with
nineteen scabrous ribs and narrower interspaces each with one
imbricated riblet. Altitude 48, length 52, diameter 13 mm. De-
scribed by Dall from the Oligocene of Antigua and Santo Do-
mingo.

188 BULLETIN 2g 352

Pecten Thompsont, n. sp.
Plate 34, Figures 9, Io

Shell thin, delicate, translucent, suborbicular, flattened, in-
equivalve; ribs eighteen or nineteen, rounded, a little wider than
the interspaces, giving a characteristically fluted aspect to the
valves; ribs and interspaces smooth except for very fine, raised,
concentric growth strie; right valve exceedingly flattened with

prominent ears, the anterior noticeably reflexed, deeply notched
beneath and sculptured with about five radial riblets more or less
squamose, especially that bordering the dorsal margin; a deep
sulcus marks the junction of the ear with the umbonal region;
posterior ear smaller, sub-triangular, its surface smooth except
for concentric growth stricze similar to those on the face of the
valve; /e/t valve also compressed but gently convex in the umbon-
al region; ears more nearly equal, the anterior with four to six
radial threads and fine growth stric; the posterior smooth except
for the strie. An average-sized sized right valve measures in
length 20, altitude 18, semi-diameter 2; a left valve 18X17X3
mm. This species is readily distinguished by its flattened form,
discrepant valves, and large, twisted right ear.

I take the greatest pleasure in naming this striking and
graceful Fecten in honor of Dr. G. B. Thompson of Bizara, Pon-
doland East, South Africa, whose devotion to the advancement
of the knowledge of the Cretaceous forms has been shown by his
collections, made under most difficult circumstances along the
wild and uninhabited coast of Pondoland.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (Abund-
ant and characteristic).

Pecten cercadica, n. sp.
Plate 34, Figure 11

Shell fan-shaped, moderately convex, fairly thick but trans-
lucent, nearly equilateral, whether equivalve or notI do not
know as we found but one valve; surface sculptured with sixteen
rounded, radial ribs with narrower interspaces; ribs and inter-

353 DOMINICAN FossiIts—MAuRY 189

spaces smooth except for fine, concentric growth lines; ears rather
large, nearly equal, triangular, feebly radially threaded towards
the base, otherwise smooth. Length 29, altitude 27, semidiam-
eter6mm. This shell is distinguished from our other Pectens by its
few ribs, equilateral form and nearly equal, large ears. It has
been kindly examined for us by Dr. Dall and not identified with
any species in the National Museum, nor does it correspond to
any of Sowerby’s or Gabb’s descriptions of unfigured Dominican

species.
Locality.—(Exp’d’16) Bluff 2, Cereado de Mao.

Pecten caimitica, 0. sp.
Plate 34, Figure 12,

We collected asingle valve of a Pecten examined by Dr. Dall
and not identified by him with any in the National Museum from
Bowden or Santo Domingo. Theshell is suborbicular, slightly
oblique, convex in the umbonal region but elsewhere rather com-
pressed; surface ornamented with twenty-two narrow, rounded,
radial ribs with narrower, concave interspaces; ribs and inter-
Spaces marked only by concentric, looped growth lines; ears very
small, nearly equal, radially threaded. Length 20, altitude 20,
semidiameter s mm. “The species is distinguished by it more
numerous ribs and very small ears.

Locality.—(Exp’d’16) ZoneI, Rio Cana at Caimito.

Pecten hatoviejonis, n. sp.
Plate 34, Figures 13, 14

Shell fan-shaped, but markedly oblique; right valve deeper
and more convex than the left; ears small; ribs about twenty-one;
on the proximal portion of the shell the ribs are narrow, nearly
smooth, except on the posterior slope of the right valve where
they are somewhat spiny; interspaces deep, concave, marked
only with growth lines; suddenly more squamose sculpture devel-
opes simultaneously on both valves, the ribs become medially
grooved, the interspaces develop two radial threads each, and
both ribs and interspaces become decidedly squamose. Lengt!

rgO BULLETIN 29 354

of shell 24, altitude 23, diameter 12, semidiameter of left valve 5s,
of right valve 7 mm. This shell hasa slight resemblance in
sculpture to P. Gabbt but that has only one interstitial thread
and is twice as large and less oblique in form.

Locality.— (Exp’d ’16) ‘Trail from Hato Viejo to Potrero,
Rio Amina.

Genus Amusium Bolten
Amustuim papyraceum Gabb

Plate 26, Figure 22

FPleuronectia papyracea Gabb, Trans. Amer. Phil. Soc., vol. 15, p.
257, S730
Amustum papyraceum Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,

p. 718, 1898; pt. 6, p. 1586, 1903.

Shell with one valve concavely flattened, the other slightly
convex; resembling the Oriental living species in being entirely
smooth externally, except for occasional concentric growth lines.
Marked internally with paired radiating ribs. Our most perfect
shell measures 60 mm. in altitude and approximately 58 in length,
but we collected fragments of much larger specimens apparently
100 mm. in altitude. The Miocene-Recent 4. Mortont Ravenel
is allied and possibly identical. A. papyracea is also found at
Bowden, but Santo Domingo is the type locality. The shell has
never before been figured.

Localsties.—(Exp’d’ 16) Samba Hills at an approximate al-
titude of 540 feet near Los Caobas; Zone F, Rio Gurabo at Los
Quemados; Guayubin to Mao road, Rio Cana; Zone I, Rio Cana
at Caimito.

Genus SPonpDyLus* Linné

Spondylus bostrychites Guppy
Plate 32, Figure 4
Spondylus bifrons Sowerby, Quart. Jour. Geol. Soc., London, vol. 6, p.

*The references to this and other genera in the description of ourroute,
pp. 3 to Io, were rough field notes made before the collections were studied.

255 DoMINICAN Foss1ts—MaurRy 1Q1

53, 1849. Not of Goldfuss, 1835.
Spondylus bostrychites Guppy, Proc. Sci. Soc., Trinidad, p. 176, 1867.
Spondylus bostrychites Gabb, Trans. Amier. Phil. Soc., vol. 15, p. 257

1873.
Spondylus bostrychites Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p.

758, 1898; pt. 6, p. 1586, 1903.

We obtained a number of fine specimens of this unfigured
species which occurs also at Bowden. A varietalform, chipolan-
ws, has been described by Dr. Dall from the Florida Oligocene.

Localities—(Exp’d ’16) Bluff 1, Cercado de Mao (common);
Zones B and F, Rio Gurabo at Los Quemados.

Spondylus gumanomocon Brown and Pilsbry
Spondylus Americanus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 257,
1873. Not of Lamarck.
Spondylus gumanomocon Brown and Pilsbry, Proc. Acad. Nat. Sci.
Phila., p. 514, 1912. (Footnote).

This species is very close to the smaller Gatun S. Scoftz. It
can be readily recognized by its great size and dissimilar valves. ‘
We have specimens collected by Gabb as well as ourown. One
of Gabb’s shells renamed by Brown and Pilsbry weighed 32%
ounces.

Locality—(Exp’d ’16) Zone D, Rio Gurabo at Los Que-
mados.

Genus AnomtA (Linné) Miller
Anomia simplex’ d’ Orbigny
Plate 26, Figure 15

Anomia simplex d’Orbigny, Hist. Pol. y Nat. Islade Cuba, p. 367,
1845; pl. 28, figs. 31-33, 1855.

Anomtia ephippium Gabb, Trans. Amer. Phil. Soc., vol. 15, p.- 257,
1873. Not of Linné.

We found a single right valve 40 mm. in length. Gabb also
found a single specimen measuring 50 mm. The fossil appears
very like the recent but, lacking the left valve, one cannot be sure
of its complete identity.

Locality.—(Exp’d’16) Bluff 2, Cercado de Mao. _

192 BULLETIN 29 | 356

Genus PLACUNANOMIA Broderip
Placunanomia lithobleta Dall

Plate 34, Figures I, 2
FPlacunanomia lithobleta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
Pp. 778, 1898; pt. 6, p. 1586, 1903.

We collected several specimens which accord with the de-
scription of this rare, unfigured species described from the Bow-
den beds, Jamaica. Our perfect shell measures 45 mm. in
length,tand 45 in altitude, but we have fragments of much larger
shells. The surface is marked by fine, wavy, radial threads,
minutely knotted or postulose; interior nacreous. This genus is
now reported for the first time fromm Santo Domingo.

Locality.—(Exp’d ’16) Guayubin to Mao road, Rio Cana.

Genus MoptoLtus Lamarck
Modiolus cercadicus, n. sp.
Plate 26, Figure 16

Shell minute, thin, fragile, translucent, with about eighteen
flat, strong, slightly nodular ribs, not divaricating and with much
narrower, linear, interspaces. Theribs do not extend over the
anterior portion of the valve which is smooth and marked by a
broad, pronounced sulcus. Greatest length 5, greatest width 4
mm.

Gabb mentions finding two minute specimens of Modiolus
which may have been this species. We have half a dozen valves
all about the same size. It is very likely immature but is well
characterized by the strong sculpture. 7. Guppyz Dall from
Bowden is also small, measuring 9 mm. in length, but with more
numerous ribs and characteristically feeble sculpture and the shell
is not anteriorly sulcate.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao.

Modiolus maonts, un. sp.
Plate 26, Figure 17
Shell very thin, translucent, perfectly smooth except for del-

357 DoMINICAN FossiLs-—MAuRY 193

icate concentric lines; outline sub-rhomboidal, hinge line recti-
linear. Length 8, altitude 15, semidiameter 3 mm. This shell
is of the same general type as the recent JZ. fulipus and the Mio-
cene zzflatus, and belongs to the section Modiolus, sensu stricto.
No shell of its type has been reported from the blue clays of
Santo Domingo or the Bowden beds of Jamaica. Although prob-
ably immature it seems best to name it, thus calling attention to
the fact that we have found both smooth and ribbed representa-
tives of the genus in the blue clays.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Asingle
shell).

Genus BotuLa Moerch

Botula hispaniole, n. sp.
Plate 35, Figure 11

Shell resembling the Oligocene to recent species B. cinnamo-
mea Lamarck and the Pliocene 2. zzcurva Gabb from Costa Rica
but very much smaller than either and apparently distinct. All
our shells are of uniform size and appear adult, they are strongly
marked with irregularly spaced concentric growth lines and the
surface shows very fine radial strice. Our recent specimen of BS.
cinnamomea from the West Indies is nearly smooth, its length 33
and greatest altitude 15, being more than twice the length of
our fossils. Gabb’s B. zzcurva is 23 long andits beaks are more
incurved than in our shells, which measure in length 16, altitude
7, diameter 9 mm.

This curious shell is quite different from any other form we
collected and easily recognized by its odd shape and deeply sinu-
ous base. It is the first Bofwla ever found in the blue clays.

Locality.—(Exp’d °16) Zone H, Rio Cana at Caimito.
(Quite common boring in coral).

Genus LITHOPHAGA Bolten
Lithophaga antillarum da’ Orbigny

Lithodomus antillarum d’Orbigny, Hist. Pol. y Nat. Isla de Cuba,
Pp. 351, 1845; Atlas pl. 28, figs. 12, 13, 1855.

194 BULLETIN 29 _ 358

Modtola corrugata Philippi, Abbild. und Beschr., vol. 2, p. 147, pl. 1,

fig. 1, 1846.
Lithophagus corrugatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 253)
1873.
Lithophaga antillarum Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
Pp. 799, 1898; Bull. 90, U. S. Nat. Mus., p. 129, I915, &

Our specimens are imperfect but seem to be identical with
recent shells of L. antillarum from Guadeloupe. | Dall found this
species in the Tampa silex beds, Florida, and Gabb mentions its
occurrence at Cevico, Santo Domingo.

Locality.—(Exp’d’16) Zone H, Rio Cana at Caimito. (Bor-
ing in coral).

Lithophaga nigra da’ Orbigny

Lithodomus niger d’Orbigny, De 1a Sagra, Hist. Pol. p Nat. Isla de
Cuba, pt. 2, vol. 5, p. 351, 1845; Atlas, vol. 8, pl. 28, figs. Io, I1,
1855. (Spanish edition).

Modiola carib@a Philippi, Abbild u. Beschr., vol. 3, p. 20, pl. 2, fig. 5,
1847.

Eis nigra Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 799,
1898; Bull. 90 U. S. Nat. Museum. p. 129, 1915.

We had several perfect specimens but so extremely fragile
that they later fell to pieces. The hinge is toothless, and the
transverse strize terminate suddenly along an oblique line passing
from the umbo backwards just as in the recent species. The shell
has been found in the Tampa silex beds and is living now in the
Antilles. -It is now reported for the first time from the blue
clays of Santo Domingo.

Locality, —(Exp’d 16) Zone H, Rio Cana at Caimito (Bor-
ing in coral).

Genus CRENELLA Brown

Crenella divaricata d’Orbigny
Plate 26, Figure 18
Nuculocardia divaricata d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla
de Cuba, Atlas pl. 27, figs. 56-59, 1855.
Crenella divaricata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 252,
1873.

359 DOMINICAN Foss1Ls—MaAury 195

Crenella divaricata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4,
p. 803, 1898.

This pretty little shell with its characteristic divaricating
radial sculpture, also occurs in the Bowden beds and is living in
the Antilles, off Panama andin the Gulf of California. Length
2.25, altitude 2.50 mm.

Locality. —(Exp’d ’16) Bluff 2, Cercado de Mao.

Genus MytrLopsis Conrad

Mytilopsts domingensis Recluz
Plate 39, Figure 5
Dreissena domingensis Recluz, Journ. de Couch., vol. 3, pl. 10, fig. 8,
Pp. 255, 1852. .

We collected several fossil shells which resemble young speci-
mens of 17. domingensis from the Monte Cristi beach, but are
somewhat more expanded and flattened in the posterior dorsal
region, yet some of the recent shells show the same tendency and
the fossil and recent appear to be the samespecies. The hi ge of
the fossil shows distinctly the characteristic supporting plate just
posterior to the cardinal area. Our largest fossil is t9 in length,
largest recent 33mm. The genus is now recorded for the first
time from the blue clays.

Locality. —(Exp’d’16) Sandy clays and Zone H, Rio Cana
at Caimito.

ORDER ANOMALODESMACEA

Genus PANpDoRA Bruguiére

Pandora inconspicua Gabb
Plate 26, Figures 19, 19a

Pandora inconspicua Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 248,

1873.
Pandora inconspicua Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.

1522, 1903.
This attractive little shell has never been figured and, to add
to the difficulty, according to Gabb’s description its length is ‘‘.3

196 BULLETIN 29 360

inch, width oneinch.’’ The last two words must bea printer’s
error, for Gabb adds that it is the smallest species of Pandora
with which he is acquainted. Our specimens seemto be what
he had in mind. The convex, left valves measure 8 mm. in
length and 4 in altitude, the right, flat valve is slightly smaller,

Localities—(Exp’d ’16) Bluff 3 (quite common); Bluff a
(very scarce), Cercado de Mao.

Genus CusprpAria Nardo.
Cuspidaria islahtspantol@, n. sp.

Plate 26, Figure 20
Neera alternata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 248, 1873.
Not of d’Orbigny.
Neera ornatissima Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p- 530, 1876. Not of d’Orbigny.

“We collected a dozen specimens of a Cuspidaria apparently
the species which Gabb and Guppy referred to the recent, but
showing constant differences as a comparison of our figure with
d’Orbigny’s will indicate.

Our shells are inflated anteriorly with umbones full, ens
prominent, curving; rostrum rather long, sub-truncate terminally;
concentric sculpture of valves feeble; radial sculpture strong pos-
teriorly, invariably obsolete anteriorly; there being four to six well
developed radials on the posterior portion of the valves, the radi-
al defining the commencement of the rostrum usually forming a
strong carina after which the radials become progressively weaker
and fade out, remaining as traces around the anterior basal
region, but entirely absent from the umbones; no interradials are
present; rostrum frequently smooth, sometimes marked by one or
two radial threads passing from the umbo towards the base of

the truncation. Length 9, altitude 6, semidiameter 3 mm.
The Bowden species C. craspedonia Dall is allied to our shell

but half as large, with interradials, stronger concentric sculpture,
and with major and minor radials which persist over the anterior
portion of the shell.

Locality—(Exp’d ’16) Bluff 3, Cercado de Mao.

36x DOMINICAN Fossints—MAURY 197

ORDER TELEODESMACKA

Genus CORALIIOPHAGA Blainville

Coralliophaga coralliophaga Gmelin
Plate 35, Figure 12

Chama coralliophaga Chemnitz, Conch. Cab., 10, p. 359, pl. 172, figs.
1673-4, 1788.
Cypricardia Hornbeckiana d’Orbigny, De la Sagra, Hist. Pol. y Nat.
Isla de Cuba, vol. 5, p. 312, 1845; Atlas, 8, pl. 26, figs. 33, 34, 1855.
Coralliophaga coralliophaga Dall, Trans. Wagner Inst. Sci., vol. 3,
pt. 6, p. 1498, 1903.
We obtained several perfect specimens of a very delicate and
fragile shell resembling d’Orbigny’s figure of C. Hornbeckiana
which fide Dallis identical with Gmelin’s species, C. corallio-

phaga, now living in the Antilles and occurring as a fossil in the
Pliocene of Florida.

Locality.—(Exp’d’16) Zone H, Rio Cana at Caimito. (Bor-
ing in coral).

Genus CRASSINELLA Guppy

Crassinella Guppyt Dall
Plate 26, Figure 21

Gouldia Martinicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 252,
1873. Not of d’Orbigny.

Crasstiellites (Crassinella) Guppyi Dall, Proc. U. S. Nat. Museum,
vol. 19, p. 326, pl. 30, fig. 5, 1896; Trans. Wagner Inst. Sci., vol. 3,
pt. 6, p. 1476, 1903.

Our shell appears a trifle less oblique and flatter than the fig-
ure of C. Guppyz, and is longer in proportion to its height. But
as this genus shows considerable variation in form in a given
species, our specimen is probably identical with the Bowden shell.
Also reported from Matura, Trinidad.

Locality.—(Exp’d’16) Bluff 2, Cercado de Mao. (Rare).

198 BULLETIN 29 362

Genus VENERICARDIA Lamarck
Venericardia scabricostata Guppy

Plate 33, Figure 1

Cardita scabricostata Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p- 293, pl. 18, fig. 10, 1866,

Cardita scabricostata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 252,
1873.

Loe coos Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 531,
1876.

el oiaD scabricostata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6,
Pp. 1428, 1586, 1903.

Shell suborbicular with about eighteen prominent, high ribs,
nodulosely crenulated; interspaces V-shaped, narrower than the
ribs; beaks high; umbones inflated. Length 21, altitude 20, di-
ameter 17 mm.

Guppy’s figure of the Jamaican type is inadequate but his
description agrees with our Dominican shells.

Localities —(Exp’d ’16) Bluff 2, Cercado de Mao; Zone G,
Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito.
(Common).

Venericardia tslahispaniole

Plate 33, Figure 2

Shell sub-quadrate, beaks very far forward, dorsal and basal
margins nearly parallel, posterior margin truncate; ribs twenty-
four, narrow, more or less smooth on the umbonal ridge, else-
where minutely but sharply nodulated on their crests; interspaces
shallow, wider than the ribs, marked withirregular wavy growth
lines. Length 23, altitude 21, diameter 18 mm.

This species is readily distinguished from scabricostata by its
quadrate form, numerous, narrow ribs with interspaces wider and
shallower.

Localities. —(Exp’d ’16) Zones A,B, E, Rio Gurabo at
Los Quemados.

363 DoMINICAN Foss11s—MAvuRY 199

Venericardia cerrogordenstis, n. sp.
Plate 33, Figure 3

Shell sub-orbicular, somewhat compressed, posterior margin
truncate; beaks very low; ornamentation of seventeen low ribs
their crest strongly nodose, giving the effect of a series of minute
fish vertebree; interspaces much wider than the ribs, those on the
anterior and central portions of the valve with two weak, second-
ary riblets or lateral keels of themain ribs, those on the posterior
region with a single radial thread; all theinterspaces but espec-
ially the posterior ones, strongly marked by wavy growth-lines;
substance of shell so thin that the interior is fluted by the exter-
nal sculpture; hinge weak; beaks rising very slightly above the
hinge. Length 20, altitude 19, semidiameter 6 mm.

Distinguished by its compressed form, low beaks, low,
strongly nodose ribs.

Locality. —(Exp’d ’16) Cerro Gordo to Mao road, Rio
Cana.

Genus CuAama (Linné) Bruguiére
Chama involuta Guppy

Plate 33, Figures 4, 5, 6
Chama involuta Guppy, Geol. Mag. London, dec. 2, vol.1, p. 436, pl.
17, figs. 5a-c, 1874; Quart. Jour. Geol. Soc. London, vol. 32, p. 531,
1876,
Chama involuta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pp.
1398, 1586, 1903.

The left valve is attached, convex, eae spirally twisted,
surface more or less granose, ornamented with foliaceous scales
sometimes forming rows of radial spines; right, free valve, adorned
with fluted, concentric lamellzee. The type is from Bowden.

Locality.—(Exp’d’16) RioCana, Guayubin to Mao road
(common); Cerro Gordo to Mao road.

Chama catmitica, n. sp.
Plate 33, Figure 7
Sheil oblong-ovate, attached by the left valve which is orna-
mented with conspicuous, irregular, vaulted scales, margin of

200 BULLETIN 209 364

valve very finely crenulate; tooth rugose; free right valve with
scales similar to but often longer, more tubular or frondose than
those on the left; the two valves are nearly equal in depth, both
being moderately convex externally. Altitude 40, greatest width
32 mm.

Gabb referred one of his Dominican Chamas to C. macero-
phylla which our party collected on the Monte Cristi beach. It
is sub-circular, much more frondose, and not identical with our
fossil species. The latter is a trifle like C. Broderipii but smaller.

Locality.—(Exp’d .’16) Zone H, Rio Cana at Caimito.

Chama congregatoides, n. sp.
Plate 33, Figure 8

Shell heavy, solid, attached by the left valve which is sub-
circular in outline, rather deep, convex externally, ornamented
with close, irregular, concentric lamelle; beaks deep, turning
strongly to the right and forward, very closely appressed to the
cardinal region; inner margin of valve finely crenulate. Altitude
of shell 31, length 30 mm.

This species resembles our specimens of the Miocene C. con-
gregata Conrad and is of the same general type.

Locality.—(Exp’d’16) Zone H, Rio Cana at Caimito.

Chama riocamica, 0. sp.
Plate 33, Figure 9

Shell rather thin, triangular in outline; attached by the right
valve which is very deep; beak directed forward and to the left,
arching over the cardinal areain an Fxogyra-like curve; teeth
somewhat rugose and pustulose; inner margin of valve not cren-
ulate; outer surface of right valve finely squamose and granulose
with a few toothed scales which along the line of attachment form
a conspicuous row. Altitude of valve 45, greatest width 30,
greatest depth 30 mm.

This species has the characteristic habit of attaching itself
by the v7ght valve and the area of attachment is large. Our
other Chamas,—involuta, caimttica, and congregatoides are all af-

365 DOMINICAN Fossiis-—MAuRY 201

fixed by the /e/¢ valve and the area of attachment is small.
Locality.—(Exp’d’16) Zone H, Rio Cana at Caimito.

Genus ECHINOCHAMA Fischer

Echinochama antiquata Dall
Plate 33, Figure Io

Chama arcinella Moore, Quart. Jour. Geol. Soc., vol. 9, p. 130, 1853.
Not of Linné.

Chama arcinella Guppy, /d., vol. 22, p. 294, 1866.

Chama arcinella Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251, 1873.

Chama arcinella Guppy, Geol. Mag. London, vol. 11, p. 442, 1874;
Quart. Jour. Geol. Soc., vol. 32, p. 531, 1876.

Etchinochama antiqguata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6,

Pp. 1404, 1586, pl. 54, fig. 9, 1903.

A number of our specimens agree very well with Dr. Dall’s
figure of the Bowden shell. They differ markedly from the re-
cent &. arcinella Linné, which is living on the Monte Cristi
beach, in their less prominent ribs and the more squamose and
the less spiny surface. Theribs in the fossil, ancestral, shell
tend to become obsolete over the posterior slope. Four valves
average 16 ribs which lie chiefly on the anterior two-thirds of
the shell. Length 48, height 45, of type length 50, height 48 mm.

Locality.— (Exp’d’16) Bluff 1, Cercado de Mao. (Large,
fine shells).

Echinochama antiquata variety yaquensis, n. var.

Plate 33, Figures 11, 12

The majority of our Zchinochamas constitute a well marked
variety differing from the typical in several respects. Fifteen
valves average only six ribs each, the ribs are distinct and near-
ly equally spaced; the shell is smaller and the height somewhat
greater than the length, which is reversed in the typical. Thus
different valves of the variety measure 38 in length, 4oin height;
36X38; 35X37mm. The variety is especially prevalent in the
Gurabo clays.

Localities.—(Exp’d’ 16) Base of limestone capping Zone A,

202 BULLETIN 29 366

Zones A and B (Common), Rio Gurabo at Los Quemados;
Bluff 1, Cercado de Mao (Rare).

Genus CoDAKIA Scopoli

Codakia orbicularis Linné
Plate 35, Figure 1

Venus orbicularis Linné, Syst. Nat., ed. 10, p. 688, 1758.

Lucina tigerina Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251, 1873.
Not of Linné.

Lucina tigrina Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
530, 1876. Not of Linné.

We found a single fossil shell which appears in every respect
like the young of C. orbicularis, on the Monte Cristi beach.
Doubtless our fossil is similar to those referred by Gabb and
Guppy to C. tigerina,; but the true tigerinais Kast Indian, the
West Indian analogue being C. orbicularis. The latter has not
been heretofore definitely recorded from beds older than Pliocene;
yet Dr. Dall mentions fragments resembling this shell from the
white limestone of Clairmont, St. Ann’s, Jamaica,—a horizon re-
garded by Hill as somewhat older than the Bowden.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito.

Genus Lucina Bruguiére

Lucina chrysostoma (Meuschen) Philippi

Plate 35, Figure 2

Tellina crysostoma Meuschen, Mus. Gevers., p. 482, 1787.

Lucina chrysostoma Philippi, Abb. und Beschr. Conchy., 2, p. 206, pl.
I, fig. 3, 1847. p

Venus edentula Chemnitz, Conch. Cab., 7, pl. 40, figs. 427-429, 1784.
Not of Linné, 1758.

Lucina edentula Reeve, Conch. Icon., Lucina, pl.2, fig. 9, 1850.

Loripes edentula Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251, 1873.

Our shells appear to be the recent species. The largest
measures 70 mm. in length by 60 in altitude.
Localities —(Exp’d’16) Bluff 3, Cercado de Mao; Zone H,

Rio Cana.

367 DOMINICAN FossILs—MAury ~ 203

Genus Myrt#a Turton

Myrtea lomasdesamba, n. sp.
Plate 35, Figure 3

Shell small, thin and delicate, greatly depressed, orbicular;
slightly resembling 17. /imonitana Dall, from Bowden. but more
circular in outline, with the concentric lamellee more distant, and
entirely obsolete over the central part of the valve. On the um-
bonal ridge the concentric lamelle become raised, forming very
sharp delicate ridges; on the anterior dorsal margin they become
squamose; on the posterior dorsal margin conspicuously spinose.
The whole shellis sculptured with extremely fine radials seen
only under the compound microscope. Right valve with a sin-
gle, strong cardinal tooth; lateral teeth obsolete; ventral margin
of shell smooth within. Length 5.50, altitude 5 mm. A rare,
fragile and exquisite sheil. !

Locality.—(Exp'd’16) Samba Hills at an approximate al-
titude of 540 feet.

Genus PHACOIDES Blainville
Phacoides domingensis Dall

Lucina Pennsylvanica Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 292, 1866. Not of Linné.

Lucina Jamaicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251,
1873. Not of Chemnitz which—pectinatus Gmelin.

Lucina Pennsylvania Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 530,
1876.

Die domingensis Dall, Trans. Wagner Inst., vol. 3, pt. 6, pp.
1363, 1586, pl. 50, fig. 11, 1903.

This isthe preecursor of the recent P. fectinatus. Our shell
is a trifle larger than Dall’s type and measures in alti-
tude 37, diameter 22 mm. This species has been found at Ballast
Point, Florida; Bowden, Jamaica; and on an island in Lake
Henriquillo, southern Santo Domingo.

Locality.— (Exp’d ’16) Bluff2, Cercado de Mao.

204 BULLETIN 29 . 368

Phacotdcs (Lucinisca) htspaniolana, n. sp.
Plate 35, Figure 4
Shell orbicular, slightly convex, beaks small, acute, directed
forwards. The species is remarkable for its exquisite sculpture
which is of the same typeas that exhibited by P. cathounsis
Dall, from the Chipola Oligocene, but more delicate, more varied
and ornate. The concentric sculpture on intersecting the radial,
rises into minute spinose beads. The umbo shows no radial
sculpture only very close, fine, concentric lines; primary radials
then appear. On the center of the valve each pair of heavier,
primary, radial ribs alternates with two finer secondary riblets
which on approaching the basai margin become subequal to the
primaries. The ribs near the dorsal posterior margin are distinct-
lysquamose. Hinge normal, with two strong lateral teeth and
one cardinal tooth. Length 11.75, approximate altitude 11,
semidiameter 3mm. A rare and lovely shell. !
Locality. (Exp’d’16) Bluff 3, Cercado de Mao.

Phacotdes (Lucinisca) cercadica, n. sp.
Plate 35, Figure 5

Shell resembling P. hzsfaniolana in miniature but with a
bolder sculpture ; beaks and part of the umbo with only close,
concentric lamellz ; radial ribs then appear; the ribs are weil
spaced, subequal, with a single, finer, secondary rib alternating
with each primary pair ; the intersections of the concentric and
radial sculpture are beaded, and the ribs defining the umbonal
ridge and anterior and posterior dorsal margins are.all three
squamose at the intersections. Hinge rather wide; right valve
with a cardinal and two strong lateral teeth; left with two
cardinals. Length of largest shell 6, altitude 5.50 mm.

Locality. (Exp’d’16) Bluff 3, Cercado de Mao. (Not
scarce).

Phacoides (Miltha) Smtthwoodwardi, n. sp.
Plate 35, Figure 6

Shell sub-quadrilateral, flattened ; beak very acute, curving

369 DOMINICAN Fossiis—MAURY 205

over anextremely small but impressed lunule only about one
millimeter in length; anterior dorsal area narrow, marked by
two weak sulci; po sterior area long, undulated, defined by a
very sharp, narrow sulcus ; surface of shell marked by very fine,
close, concentric strize and traces of faint, just perceptible, obso-
lete radial lines ; teeth strong, normal. Length of left valve 45,
altitude 50, semidiameter 6 mm.

This species is apparently the ancestor of J/. caloosaénsts
Dall, from the Florida Pliocene and 47. Childreni Gray (type of
the subgenus) living in the Gulf of California. Our shell can
readily be differentiated from caloosaénsis by the posterior dorsal
area. In the Pliocene shell the area has two very sharp sulci,—
one limiting, one central ; while in our shell the central sulcus is
represented by a broad undulation.

This is the first AM/z/tha found in the Dominican blue clays.
Though well represented in the Eocene the stock dwindled and
there are but two living species, one, as noted above, on the Cal-
ifornian coast, the other off Mozambique.

I take great pleasure in naming this rare shell in honor of
Dr. Smith Woodward of the British Museum, as a token of ap-
preciation of many kindnesses.

Locality.—(Exp’d ’16) Bluff 2, Cercado de Mao.

Phacoides (Miltha) riocanensts, n. sp.
Plate 35, Figure 7

Shell sub-orbicular, disciform; beak nearly central; entire
surface ornamented with concentric lameilz closely set on the
umbo but becoming progressively more distant distally ; between
the lamellee are weak, irregular, concentric stire. Length 48,
altitude 48, semidiameter of right valve 7 mm.

This is a representative of the type of A7lthas with sharp,
concentric lamellation, exemplified by JZ. hillsboroensis and disci-
formts Heilprin, from the Pliocene of Florida. Our shell is closer
to the former species, but differs markedly in its fewer concentric
lamellee which become more and more distant as the shell becomes
adult. The interior of our shell is concealed by a hard matrix, but

206 BULLETIN 29 370

according to Dall, the shells of this group of Miltha have the
major cardinal tooth deeply bifid, the posterior scar very small,
and the anterior very narrow.

It is interesting that we should have found a representative
of both groups of W7zltha, though evidently they are very rare in
the blue clays.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito.

Phacoides (Parvilucina) yaquensts Gabb
Plate 35, Figure 8

Lucina Yaquensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 251,
1873.

Phacotdes ( Parvilucina) yaquensts Dall, Trans. Wagner Inst. Sci., vol.
3, pt. 6; py 1382, 1903.

A Parvilucina which accords with Gabb’s description of his
unfigured yaguensis is exceedingly common at Cercado. Besides
the more apparent concentric lines, some shells show a very faint
radial sculpture. Dall gives 4mm. asthe length of his largest
specimen from Bowden where the species also is found. Our
largest is 3.50 long and 3 in altitude.

Localities—(Exp’d ’16) Bluff 3, Cercado de Mao (hundreds
of shell) ; Zone H, Rio Cana at Caimito (scarce).

Phacoides (Bellucina) actinus Dall

We collected four valves of a Bellucina either identical with
or very closely allied to P. actimus from Bowden. Like that
species our shells have about sixteen, radial, rounded riblets
crossed by ridged concentric lines, and the sculpture appears pre-
cisely like Dr. Dall’s figure of actinus. Only our valves seem
slightly more excavated on the dorsal margin with the beaks
sharper and more curved. This is very probably due to the fact
that the umbones are all worn, the outer surface of the beaks
being entirely eroded.

Locality. —(Exp’d’16) Zone H, Rio Cana at Caimito.

B71 DoMINICAN Foss1ts—MAvuRY 207

Genus DIvARICELLA von Martens

Divaricella prevaricata, Guppy
Plate 35, Figure Io
Divaricella prevaricata Guppy, Proc. U.S. Nat. Museum, vol. 19, no.
LNLON pe. 327, pln 30, toe) A TSG:
Divaricella prevaricata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6,
pp. 1389, 1587, 1903.

Shell resembling D. guadrisulcata d’Orbigny, but smaller.
Our largest is exactly the length of Guppy’s Jamaican type, 2. e.
8 mm., and measures 7 in altitude and 3 in semidiameter. This
shell is probably what Gabb referred to Lucina dentata Wood.

Localities —(Exp’d ’16) Bluff 3, Cercado de Mao; Zone I,
Rio Cana at Caimito; Zone G, Rio Gurabo at Los Quemados.
(Rather abundant).

Genus DIPLODONTA Brown

Diplodonia capuloides Gabb
Plate 39, Figure 1
Mysia capuloides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 252, 1873.
Diplodonta capuloides Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 5, pp.
1182, 1183, 1900.

Shell thin, globose, of the same type asthe Eocene D. tur-
gida ; beaks small; umbones enormous. Largest shell 4.50 in
length, altitude 4.50, semidiameter 2.25 mm. Our species ap-
pears identical with Gabb’s unfigured D. capuloides, described
from Santo Domingo and also found at Bowden.

Locality—(Exp’d ’16) Bluff 3, Cercado de Mao.

Diplodonta puncturella Dall

Diplodonta ( Phlyctiderma) puncturella Dall, Trans. Wagner Inst Sci.,

vol. 3, pt. 5, p. 1183, pl. 45, fig. 26. Igo00.

Our specimens are precisely like Dr. Dall’s beautifully drawn
figure of this Bowden species, agreeing in the minutest details of
the hinge. Length of largest shell 6.25, altitude 6, semidiameter
2mm. The majority are smaller. Species still living.

Gabb’s Dominican D. swbguadrata 1873, was preoccupied by

208 BULLETIN 29g 372

Carpenter 1855, and renamed Gadli by Dallin 1900. This spe-
cies has never been figured but the description sounds like our
shell except Gabb says it is smooth while ours is minutely punc-
tate. We have no metatypes of Gabb’s for comparison but
should the two species prove identical puncturella has precedence.

Localities.—(Exp’d ’16) Bluff 3, Cercadode Mao; Zone I,
Rio Cana at Caimito.

Genus Montracura Turton
Montacuta cercadica, n. sp.
Plate 39, Figure 2

Shell very inequilateral, with the general form of 17. actino-
phora Dall from the Oligocene of Oak Grove, Florida; but with
the posterior, shorter end more evenly rounded; the anterior,
longer and more pointed ; and the shell decidedly inflated, not
at all compressed. Substance of shell thin and fragile, trans-
lucent ; surface marked only by delicate, irregularly spaced con-
centric striations; hinge delicate with a rather strong cardinal
‘“‘thook.’’ Length 6.60, altitude 5.50, semidiameter 1.50 mm.
This genus has never before been found in the blue clays of San-
to Domingo, nor is it known at Bowden. ©

Locality.—(Exp’d’ 16) Bluff 3, Cercado de Mao.

Montacuta maoica, n. sp.

Plate 39, Figure 3

Shell fragile, very inequilateral, resembling in form 7. chzp-
olana Dall, from the Oligocene of Florida, and closely related to
that species. Our fossil is, however, thinner, somewhat more in-
flared, and the sculpture of delicate concentric linesis more ele-
gant; the umbones are nearly smooth but the concentric lines
elsewhere are raised and sharp. The hinge characters are like
those of 17. chifolana. Length of largest shell 9.50, altitude 6,
semidiameter 2mm. A smaller shell measures 7.10X 4.50 X 1.50.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

373 DOMINICAN FossiLts-—MAuRY 209

Montacuta hispantole, n. sp.
Plate 39, Figure 4

Sh ell thin, inequilateral, but not so strikingly so as the two
preceding species, and at once differentiated from them by its de-
pressed form ; anterior end somewhat longer than the posterior
and both extremities evenly rounded ; beaks low, inconspicuous,
acute ; a faint, broad, medial sulcus passes from the umbones to
the ventral margin ; surface with regularly spaced, elevated, con-
centric lines becoming obsolete and irregular towards the ventral
margin ; nearly the entire surface is covered with faint, radiating
strice ; hinge very delicate with a feeble cardinal and no lateral
teeth. Length of shell 7.25, altitude 5, semidiameter .75 mm.

Locality.—(Exp’d’16) Bluff 3, Cercado de Mao.

Genus Carpium Linné
Cardium ( Trachycardium) dominicanum Dall
Plate 36, Figure I
Cardium sub-elongatum Gabb (in part), Trans. Amer. Phil. Soc., vol.

15, p- 250, 1873. Not of Sowerby, 1840.

Cardium ( Trachycardium) dominicanum Dall, Trans. Wagner Inst.
Sci., vol. 3, pt. 5, p. 1082, 1900.

Cardium (Trachycardium) dominicanum Brown and Pilsbry, Proc.
Acad. Nat. Sci. Phila., p. 367, Io1T.

We collected quantities of this species which answers in every
respect to Dr. Dall’s figure and description. It was also collected
by Powell near Gatun on the line of the Panama Canal.

Locality.—(Exp’d ’16) Bluff 3 (very abundant), Bluff 2
(very scarce), Cercado de Mao.

Cardium (Trachycardium) lingua-tigris, n. sp.
Plate 36, Figure 2
Cf. Cardium lingua-ieonis Guppy, Quart. Jour. Geol. Soc. London,
vol. 32, p. 531, 1876.

Not Cardium lingua-leonts Guppy. /d. vol. 22, p. 293, pl. 18, fig. 7,
1866.

210 BULLETIN 29 394

Shell with the general aspect of Guppy’s Jamaican C. ingua-
leonts but differing in the following repects: (1) the ribs in the
Jamaican shell number 32, in the Dominican 42; (2) in the
former the ribs are sharp and surmounted by a distinct keel with
rippled edges, in the latter the ribs are broad, flat and smooth
over all the central part of the valve and there is no keel apparent ;
(3) the beaks of the Jamaican shells are full and high, while those
of the Dominican species are exceedingly low.

The ribs on the anterior slope are faint and finely, trans-
versely rippled with growth lines. The last eight ribs on the
posterior slope have a row of pustules along their posterior edge,
the pustules being very minute except on the last tworibs. The
posterior margin of the valve is deeply serrate; lateral teeth
strong. Greatest breadth 45, thickness of one valve 13 mm.

Locality. —(Exp’d ’16) Zone H, Rio Cana at Caimito. _

Cardium ( Trachycardium) tintinnabularum, n. sp.

ki Plate 36, Figure 3

Shell rounded, rather thin and delicate, remarkable for its
beautiful and curious ornamentation ; valves sculptured with
many regular fine ribs which in seven shells average forty-four ;
the ribs over the anterior portion are adorned with what resemble
rows of miniature pendant sleigh bells which arise from the anter-
ior edges but hang over upon the crests of the ribs, on the center
of the valve the bells give place to small spines which first arise
from the crest of the ribs but gradually are shifted to the poster-
ior edges and finally come to lie in the interspaces. The spines
at first small and erect become curved and bean-shaped on the
posterior slope of the shell. Inner margin of valves serrate,
teeth sharply defined. Altitude of largest valve 20, width 20,
thickness 7.25; a shell with both valves still together meas-
ures 18 X18 X14 mm.

Locality.—(Exp’d’16) Gravels and Zone H, Rio Cana at
Caimito ; Bluff 3, Cercado de Mao.

375 DoMINICAN FossiLs—Maury 2iI

Cardium (Trachycardium) Cinderella, n. sp.
Plate 36, Figure 4
Shell sub-circular in outline, thin, rather fragile; sculpture
of forty-four ribs distally channelled, adorned with close-set, con-
spicuous, spinose vaulted scales; interspaces very marrow,
grooved, marked by microscopic, regular transverse strice. Length
25.5, altitude 26, thicknessof one valve 1omm. A member of
the Cardium muricatum group.
This handsome shell is very rare.
Locality.—(Exp’d’ 16) Zone B, Rio Gurabo at Los Que-
mados.
Cardium (Trigonicardia) haitense Sowerby
Plate 36, Figures 5, 5a
Cardium Haitense Sowerby, Quart. Jour. Geol. Soc. London, vol. 6,

Pp. 52, pl. 10, fig. 11, 1849.
Cardium Flaitense Guppy, Jd., vol. 22, p. 293, 1866.
Cardium (Fragum) Haitense Gabb, Trans. Amer. Phil. Soc., vol. 15,

Pp. 251, 1873.
Cardium haitense Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 531,
1876.

Cardium ( Trigoniocardia) hattense Dall, Trans. Wagner Inst. Sci.,
vol. 3, pt. 5, pp. 1103, 1105, 1900.

Our specimens are divisible into two groups both with typi-
cally ten ribs on the truncation and fourteen on the body. (1)
Shells with the posterior slope from the beak to the margin
roundly angulated, outline subquadrate ; (2) shells with the pos-
terior slope very sharply angulate and the posterior margin cor-
respondingly produced. Sowerby’s figures indicate that he con-
fused these two forms in C. hazfense. His upper figure (of the
exterior) agrees with his description that the slope is roundly
angulated, while the lower figure (of an interior) is evidently the
angulated shell with the posterior margin produced. The writer
would suggest restricting the true C. haztense to the first form
and calling the second by a varietal name, as indicated below,
since they seem to intergrade. C. haztense has also been report-
ed from Cumana and Bowden.

Localities.—(Exp’d ’16) Bluffs 2 and 3, Cercado de Mao ;
Zone G, Rio Gurabo; Zone I, Rio Cana.

212 BULLETIN 29 379

Cardium (Trigontocardia) hatiense variety cercadicum, n. var.
Plate 36, Figure 6

As noted above, this form differs from the typical in its
sharply angulated posterior slope and produced posterior margin.
Ribs usually ten on the truncation, fourteen on the body, orna-
mented with nodules pointing upwards. Several shells measure
as follows: altitude 17, length 14, diameter 12; 15X14XI1;
12 bi xo) mim:

Locality. —(Exp’d ’16) Bluff 2 (common), Cercado de Mao.

Cardium ( Trigoniocardia) aminense Dall
Cardium ( Trigoniocardia) aminense Dall, Trans. Wagner Inst. Sci.,
VOle Be Pty se ps) LLOAM GOO pt. On ply Ae) toe Tn eT GO2%

This high, narrow species measures in altitude 14, length
9.5, diameter 12mm. Body with ten to eleven high, flat ribs,
their wedge-shaped nodules pointing downwards ; truncation with
ten riblets with tear-shaped nodules.

Type locality Potrero, Rio Amina.

Cardium (Trigoniocardia) sambatcum, n. sp.
Plate 36, Figure 7

Shell sub-quadrate, rather thin, anterior margin roundly
truncate, posterior truncate, base rounded ; umbonal slope round-
ly angulated ; inner margin deeply serrate; ribs on the body
seventeen, on the truncation ten, ribs with only a few nodules
preserved but showing definite marks of having been all nodose ;
interspaces narrower than the ribs, marked strongly by transverse

growth lines. Altitude 17, length 17, diameter 14 mm.
This species resembles haztense but is squarer and has more

ribs.
Locality. —(Exp’d ’16) Samba Hills at an approximate al-

titue of 540 feet.

Cardium (Levicardium) serratum Linné

Plate 36, Figure 8

Cardium scrratum Tanné, Syst. Nat., ed. 19, p. 680, 1758.
Cardium levigatum Vamarck, An. s. Vert., 6, pt. 1, p. 11, 1819. Not

377 DoMINICAN Fossirs—-MAURY 213

of Born nor of Linné.

Cardium (Levicardium) serratum Dall (in part), Trans. Wagner Inst.
Sci., vol. 3, pt. 5, p. 1110, 1900.

Cardium (Levicardium) serratum Brown and Pilsbry. Proc. Acad.
Nat. Sci. Phila., p. 367, I9I1.

Certain of our fossil L@vicardia seem identical with speci-
mens of serratum living on the Monte Cristi beach. This species
is common in the Miocene-Recent faunas and also occurs at Bow-
denand Gatun.

Localities.—Exp’d’16) Zones E, F, G, Rio Gurabo at Los
Quemados; Bluff 1, Cercado de Mao; Samba Hills, approxi-
mate altitude 540 feet.

Cardium (Levicardium) venustum Gabb
Plate 36, Figure 9
Cardium venustum Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 251,
1873.
Cardium (Levicardium ) sevratum Dall (in part), Trans. Wagner Inst.
Sci., vol.3, pt. 5, p. I110, 1900.

A number of our fossils differ somewhat in form from typical
serratum, the ribbing is more distinct and the umbones fuller.
They correspond to Gabb’s description of his unfigured C. venus-
tum. Dr. Dall united venustum with serratum and it may be
that a larger series would show this to be true. I simply indi-
cate the difference exhibited by shells in our collection.

Locality. —(Exp’d’16) Bluffs 2 and 3, Cercado de Mao.

Genus PROTOCARDIA Beyrich
Protocardia gurabica, n. sp.
Plate 36, Figure 10
Shell resembling the Vicksburgian Oligocene P. diversa Con-

rad, but differing in the following respects:— (1) the posterior
sculpture in azversa consists of about twenty to twenty-five very
sharply defined, highly raised, radiating threads with wider inter-
spaces ; in our fossil there are about forty-three crowded, flat-
tened, slightly wavy threads with interspaces much narrower, re-
duced to mere lines ; (2) in dversa the ending of the posterior
sculpture is defined simply by a slightly heavier radiating thread

214 BULLETIN 29 378

in our shell its termination is defined by a fine but sharp carina-
tion extending from the umbonal region to the base, the posterior
slope of this carination forming a smooth band marked only at
frequent intervals by fine, oblique raised growth-strie; (3) the
posterior region is very slightly undulate in dzversa but markedly ©
so in our fossil, there being two sulci with a fold between; (4)
the sculpture over the central part of our shell ismuch finer and
more delicate, consisting of fine radial and concentric lines ; and
anteriorly the concentric lines are sharper than in dzversa.
Length 24, approximate altitude 2t, diameter 18 mm.

Our single specimen though imperfect has seemed worth de-
scribing as it is the first Profocardia ever found in the Dominican
blue clays. nae

Locality.—(Exp’d’ 16) Zone G, Rio Gurabo at Los Que-
mados (very rare).

Protocardia tslahispaniol@, n. sp’
Plate 36, Figure 11

Shell markedly resembling the recent deep sea Antillean P.
peramabilis Dall and, to a less degree, the allied Bowden P.
jamaicensis Dall; but nearly twice the size of the first and four
times that of the second, and more excavated posteriorly than
either. Posterior sculpture extending over more than a third of
the shell, terminated bya slightly thicker radiating riblet and
consisting of very narrow riblets, three to every millemeter, alter-
nating with wider interspaces which are either transversely or
obliquely cross-barred with fine lamella, those obliquely barred
intervening between one or generally two straight-barred spaces.
For a distance of about five millemeters from the posterior mar-
gin the riblets cease and the surfaceis smooth except for three
rather distant impressed, punctate lines. Near the anterior bor-
der of the posterior sculpture several rows of very minute
prickles remain, evidently the remnants of many which once
ornamented the shell and have been abraded. The few which
remain all arise from the obliquely-barred interspaces. “The anter-

379 DOMINICAN FossILsS—MAvuRY 215

ior central portion of the shell is sculptured with stronger radi-
ating and feebler concentric threads. The latter gradually
strengthen anteriorly, where they form a network withthe radi-
ating threads, every intersection being knotted. The shell is ex-
ceedinely thin and fragile and cannot be removed from the ma-
trix to examine the interior. Length 23, altitude 22, approxi-
mate semidiameter 7.5 mm.

It is curious that the Gurabo bluffs should have yielded two
species of this genus, rare at such horizons ;—one akin to the
Vicksburgian and the other apparently the ancestor of the living
deep sea species.

Locality.—(Exp’d’16) Zone B, Rio Gurabo at Los Quema-
dos.

Genus PiTarRIA Roemer

Pitaria (Lamelliconcha) circinata Born
Plate 37, Figure 1

Venus circinata Born, Test. Mus. Vind., p. 61, pl. 4, fig. 8, 1780.

Cytherea juncea Guppy, Quart. Jour. Geol. Soc. London, vol. 22,
p. 682, pl. 26, fig. 13, 1866.

Chione circinata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 250, 1873.

Cytherea juncea Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 531, 1876.

Pitaria (Lamelliconcha) circinata Dall, Trans. Wagner Inst. Sci., vol.

3, pt. 6, p. 1269, 1903.

Fide Dall, Guppy’s Cumana type of juncea is identical with
the recent czvcinata; and on comparing our specimens from the
blue clays of the river bluffs with those from the beach at Monte
Cristi no constant differences are discernible. The shellis also
found at Gatun and is living on both coasts of Central America
and in the Antilles. It is at once differentiated from our other
Dominican species by itssingle, sharp, intermediate thread between
every two lamelle. This alternation is more marked in our fos-
sil than in our recent shells. Length 34, altitude 29, semidiam-
eter 9 mm.

Localities.— (Exp’d ’16) Zones H and I, Rio Cana at
Caimito.

216 BULLETIN 2g 280

Pitaria acuticostata Gabb
Plate 37, Figure 2
Callista acuticostata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 250
1873.

We collected a large number of shells, mostly young, which
answer to Gabb’s description of this unfigured species. They
resemble young shells of P. civcinata, but are flatter and che
lamelle are all equal, there being no intermediate thread. Length
of largest shell 11, altitude 17, semidiameter 6mm.

Localities—(Exp’d’16) Zone G, Rio Gurabo at Los Que-
mados.

Pitarta carbasea Guppy

Cytherea (Circe) carbasea Guppy, Quart. Jour. Geol. Soc. London, vol.
22, p. 292, fig. 13, 1866. ;

Callista Carbasea Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 250,
1873.

ee Cs carbasea Dall, Trans. Wagner Inst. Sci., vol.
3, pt. 6, p. 1266, 1903.

This species was described from a Jamaican fossil and later
found by Gabb in Santo Domingo. We have no representatives
of this shell and it ishere simply mentioned as an authentic fig-
‘ured, species likely to be found in Dominican collections.

Pitaria cercadica, n. sp.
Plate 37, Figure Io

Shell, rounded, inflated, umbones full, beaks incurved ;
lunule marked off by a single line hardly breaking the concentric
sculpture ; escutcheon not defined ; umbonal region of both our
shells smooth, perhaps worn so, entire remaining surface sculp-
tured with close, fine, apparently uniform flattened ridges, but
when examined with a lens they are seen to be somewhat irregu-
lar and occasionally divaricating ; only one imperfect hinge is
free from the matrix but it appears tobe thatof Prtaria. Our
shell shows no radial sculpture whatever. Length 30, approxi-:
mate altitude 25, semidiameter to mm.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

382 DOMINICAN FossiLs-—MAuURY 217

Pitaria planivieta Guppy

Cytherea ( Callisia) planivieta Guppy, Quart. Jour. Geol. Soc. London
vol. 22, p. 292, pl. 18, fig. 3. 1866.
Callista planivieta Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 250, 1873.
Cytherea planivieta Guppy, Quart. Jour Geol. Soc. London, vol. 32
Dress ea EOTO:
Pitaria (Lamelliconcha) planivieta Dall, Trans. Wagner Inst. Sci., vol
2, pt. 6, p. 1268, 1903.
_ Guppy’s figure exaggerates the slight irregularity of the
concentric ribbing,—as he later wrote, the type was somewhat
distorted. Well preserved shells are polished with flat, close ribs
and very narrow, almost linear interspaces. Bowden is the type
locality. Dall has identified, somewhat doubtfully, imperfect
specimens from White Beach, near Osprey, Florida as this species.
Localities.—(Exp’d’ 16) Bluffs 2 and 3, Cercado de Mao;
Zone G, Rio Gurabo at Los Quemados; Zone I, Rio Cana at
Caimito.

Genus ANTIGONA Schumacher

Antigona targuinia Dall

Plate 37, Figure 4

Venus magnifica Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 249°
1873. Not of Sowerby 1853.
Cytherea tarquinia Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1274)
pl. 38, figs. 2, 2a, 1903.
Antigona targuinia Dall, Bull. 90, U. S. Nat. Museum, p 147, I9I5.
Our shell resembles Dr. Dall’s figures of A. farqguinia from
the Ballast Point silex beds; but its posterior dorsal margin is
very much more sloping. More material may prove the Domini-
can shell to be of varietal rank. Length 36, altitude 33, semi-
diameter 10 mm.
Locality.—(Exp’d’16) Zone H, Rio Cana at Caimito.

Antigona (Ventricola) Blandiana Guppy
Plate 37, Figure 5

Venus Blandiana Guppy, Geol. Mag. London, p. 436, pl. 17, fig. 8,
1874; Quart. Jour. Geol. Soc. London, vol. 32, p. 530, 1876.

218 BULLETIN 29 304

Cytherea ( Ventricola) Blandiana Dall. Trans. Wagner Inst. Sci., vol.
3, pt. 6, pp. 1277, 1587, 1900.

Larger and finer than specimens from Jamaica which is the
type locality, but apparently the same species. Readily recog-
nized by the elegant sculpture of equidistant, concentric lamellze
between each of which are groups of concentric threads. Guppy’s
type had seven or eight threads in every group, ours rarely show
as many and only over the umbones, usually there are about four
to a group. Our largest shell measures in length 41, altitude 36,
diameter 25 mm.

Localities. —(Exp’d ’16) Bluff 1, Cereado de Mao; Zones
A, B, F, Rio Gurabo at Los Quemados ; Guayubin to Mao road,
Rio Cana.

Genus CHIONE Megerle von Muhlfeldt

Chione Woodwardi Guppy
Plate 37, Figure 6
Venus Woodwardi Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.
292, pl. 18, fig. 1, 1866; J/d., vol. 32, p. 530, 1876.

First described from Jamaica but also common in Santo Do-
mingo, our specimens according in every respect with Guppy’s
description. The recent Antillean analogue of this beautifully
sculptured shell is C. cancellata Linné.

Localities.— (Exp’d’16) Bluffs 2 and 3, Cercado de Mao;
Zone G, Rio Gurabo at Los Quemados; Zone I, Rio Cana at
Caimito.

Chione cof. Wall Guppy
Plate 37, Figure 7 -
Venus Walls Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 581,
pl. 26, fig. 16, 1866.
Chione Walli Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pp. 1291,
1587, 1903.

Among our Chiones are several which differ from C. Wood-
waradt in their somewhat larger size, and in the d7stznct doubling
of the ribs upon the disc. The latter feature is characteristic of
C. Walli, described by Guppy from the Manzanilla beds of
Trinidad and also found at Bowden but not as yet reported from

383 DoMINICAN Fosstts—Maury 219

Santo Domingo. That species however, has an intermediate rib
between every pair but of these secondary ribs a few only appear
on ourshell. As occasionally arib doubles in Woodwardi our
shell may be a mutation of that species with this tendency great-
ly increased.

Locality.— (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao.

Chione (Lirophora) Hendersoni Dall

Plate 37, Figure 8
Venus paphia Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 292,
1866. Not of Linné.

Chione paphia Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 249, 1873.

Venus paphia Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 292, 1876.

Chione (Liophora) Hendersonii Dall, Trans. Wagner Inst. Sci., vol.

3, pt. 6, p. 1295, pl. 55, fig. 22, 1903.

The Bowden shells are described as having about fifteen ribs,
sometimes so close together as to obscure the interspaces. Our
Dominican specimens show variation in the number of ribs and
they are not so crowded. The most closely sculptured shells
have about eleven large ribs and three to five small ones on the
beaks. Others have only six or eight large ribs. This difference
leads one to conclude that the ribbing is inconstant and that
probably our shells are the same species as the Jamaican.

Localities—(Exp’d ’16) Bluff 1, Cereado de Mao; Zone G,
Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito.

Genus PETRICOLA Lamarck

Petricola caimztica, n. sp.
Plate 37, Figure 11

Shell, rounded, convex, rather thin, gaping posteriorly ;
sculptured with occasional concentric ridges and characterized by
the surprising and varied radial sculpture. On the umbonal
region the radials anastomose forming series of very narrow,
elongated V-shaped designs, the apices extending downwards;
after a distance of about seven millemeters from the beaks the
radials suddenly become coarser, more distant, more oblique and
irregular, on the face of one valve breaking up to form a series of

220 BULLETIN 29 ; 384

large Vs with apices directed upwards. The sculpture is strong-
est on the central part of the valves and is weaker posteriorly.
Cardinal teeth in the left valve two, the anterior strongly bifid.
Length 14, altitude 13, semidiameter 4mm. The first Petricola
ever found in'the Santo Domingo blue clays.

Locality. —(Exp'd '16) Zone H, Rio Cana at Caimito.
(Boring in coral).

Fetricola (Rupellaria) riocanensis, n. sp.
Plate 37, Figure 12

Shell ovate, convex, inflated; very short and rounded an-
teriorly, produced and bluntly pointed posteriorly ; radially
sculptured with somewhat irregular, sharp ridges which are in-
terrupted and rendered more or less discontinuous by the thick-
ened concentric resting stages. This speciesresembles P. typica
Jonas now living in the Antilles and found in the Florida Plio-
cene, but differs in the following respects:— (1)the fossil is short-
er anteriorly ; (2) less produced posteriorly; (3) the beak is
more anterior ; (4) the sculpture more uniform over the shell ;
(5) the hingeis weaker. These differences are constant in all
our specimens. Length 21, altitude 17, semidiameter 8 mm.

A recent shell in the Newcomb collection labelled P. robusta
Sowerby from the Gulf of California is the Pacific analogue of
our fossil.

Locality.— (Exp’d ’16) Zone H, Rio Cana at Caimito.
(Boring in coral).

Genus TELLIna Linné
Tellina riocanensis, 1. sp.

Plate 38, Figure 3

Shell polished, shining, somewhat inequivalve, the right valve
being more compressed than the left, the difference in diameter
averaging a millemeter; left valve gently convex; the vaives
are also discrepantly sculptured, the sculpture of the right being
stronger. The ornamentation consists of fine, close, flattened

385 DOMINICAN Fosstts—MAvuRY 221

ridges, asin JZ. punicea and alternata, but very much feebler.
On the right valve the ridges extend over the shell as far as the
anterior edge of the umbonal ridge where they end, only a few
being continued as raised concentric threads. On the left valve
the concentric ridges are present only on the anterior end then
fade out, so that the central aud posterior portions of the shell
are smooth except for very fine concentric growth-lines. Both
valves show in certain lights faint, obsolete radial strice ; both
valves show a distinct anterior and posterior sulcus, the former
near the anterior dorsal margin, the latter on the umbonal ridge.
Interior of valves with a radiai rib just behind the anterior ad-
ductor scar; cardinal and lateral teeth very strong in the right
valve, the anterior lateral especially conspicuous, posterior cardi-
nal tooth bifid ; teeth of the left valve weaker or obsolete ; pallial
sinus very deep, extending to the anterior adductor scar. Length
of average! sized shell 41, altitude 22, diameter 9, that of the
left valve being 5, that of the right 4mm. This pretty species is
referable to the section Lurytellina.

Localities. — (Exp’d ’°16) Zone H (abundant), Zone I
(scarce), Rio Cana at Caimito.

Tellina tslahitsapaniol@, n. Sp.
Plate 38, Figure 6

We collected two right valves of a very delicate, fragile 7e//-
ina at once differentiated by its exquisite microscopic sculpture.
The left valve is as yet unknown. Right valve oblong, greatly
compressed, umbonal ridge angulated, with a broad sulcus be-
hind, rendering the posterior margin of the shell arcuate ; concen-
tric sculpture of extremely fine, close, rounded threads extending
to the umbonal ridge where they are replaced by less regular,
arcuate growth-lines continuing to the dorsal margin, radial
sculpture of fine incised lines absent from the posterior dorsal
region, commencing just anterior to the umbonal ridge; for
some distance they are close-set and regularly spaced, cutting
the concentric thread into rectangular blocks, but towards the
center of the valve and anteriorly the radii become more distant,

222 BULLETIN 29 386

irregularly spaced and present only near the basal margin, obso-
lete proximally ; pallial sinus very deep, extending nearly to the
anterior scar ; shell strengthened by an oblique internal ray just
posterior to the anterior scar; teeth delicate but sharp. Length
of largest valve 43, altitude 24, semidiameter 3 mm.
Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (Scarce).

Tellina Waylandvaughani, n. sp.
Plate 38, Figures 7, 8

Shell ovate, porcellanous, rounded anteriorly, pointed but
not produced posteriorly ; beaks low, sub-central ; posterior dor-
sal margin sloping steeply forming a sharp angle with the base ;
basal margin sinuous, centrally inflected ; valves discrepant in
form and sculpture ; left valve gently convex, evenly, very finely,
concentrically grooved, the groovings fading on reaching the um-
bonal ridge and represented thereafter by concentric growth-
lines; right valve compressed centrally ; sculptured anteriorly
and centrally with concentric groovings similar to those of the
left valve but a trifle stronger; on approaching the umbonal
ridge and thereafter the sculpture suddenly grows bolder, the
groovings deepening so as to place the intervening ridges in quite
high relief; in certain lights faint traces can be seen on both
valves of obsolete radial strize, especially on the anterior half of
the shell; pallial sinus deep, reaching almost to the anterior
muscle scar ; our single shell is thickened internally in the umbon-
al region appearing somewhat pathologic; each valve is strength-
ened by a very strong, anterior, internal ray and a feeble posterior
one. Length 45, altitude 24, diameter 11 mm.

This, our handsomest Ze//ina is named in honor of Dr. T.
Wayland Vaughan, as a token of friendship and appreciation of
his very great kindness in obtaining for us reports on our fova-
minifera, Bryozoa, Echinoderms and Crustacea and himself writ-
ng a very valuable and beautiful report on our Corals.

Locality.—(Exp’d’ 16) Zone G, Rio Gurabo at Los Que-
mados.

287 DoMINICAN Fosstns—MAuRY 223

Tellina maotca, n. sp.
Plate 38, Figure 5

We collected four right valves of a 7e/dina distinguished from
the others of equal size by its very smooth surface marked only
by fine, irregularly spaced growth-lines; in certain lights the
faintest radial striations can be detected ; instead of a sulcus the
posterior dorsal slope has alow fold extending to the umbonal
ridge ; interior of valve concealed by the matrix ; left valve un-
known. Length of right valve 44, altitude 25, semidiameter
4mm.

This, like our other larger 7el/ing, is quite unlike any spe-
cies described from Bowden ; while 7. mznuta Gabb is the only
member of the genus heretofore described from the Santo Do-
mingo Tertiary beds.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Tellina ctbaoica, ni. sp.
Plate 38, Figure ro

Shell rather small, thin, very highly polished ; shaliowly sul-
cate posteriorly ; valves similar except that the right is slightly
more sharply lined and has the two strong lateral teeth which are
lacking in the left, as is characteristic of the section Aurytellina.
Surface of the valves marked only by fine, microscopic, impressed
lines obsolete posteriorly ; traces of very faint, close radial strize
can be seen in certain lights under alens. Length 25, altitude
15.5, diameter 6 mm.

Localities.— (Exp’d ’16) Zone H, Rio Cana at Caimito.
(Rare).

Tellina (Merisca) crystallina Chemnitz

Plate 38, Figure 4

Tellina crystallina Chemnitz, vol. 11, p. 210, figs. 1947, 1948.
Tellidora crystallina Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 249,
1873.
This striking and exquisitely sculptured shell is the type of
the section (Werisca. We obtained quite a quantity of specimens

224 BULLETIN 29 288

-from the Monte Cristi beach, among which are some identical in
every respect with our fossils from the blufis.

Locality.—(Exp’d ’16) Bluff3, Cercado deMao. (Rather
rare).

Tellina (Mertisca) Sancti-Dominict, n. sp.
Plate 38, Figure 11

Shell small, ovate, with two distinct posterior sulci and cor-
responding folds between ; valves somewhat discrepant in form,
the right being a trifle more inflated, appearing shorter and high-
er and the left being a little more strongly sculptured. The sur-
face is ornamented with fine, ridged, concentric lamelle, appear-
ing under a lens very delicate, sharp and frosty; right hinge
with distinct fine laterals, lacking in the left. Length 11, altitude
8, diameter 4 mm.

Locality—(Exp’d ’16) Bluff 3, Cercado de Mao.

Tellina (Scissula) cercadica,n. sp.
Plate 38, Figure 9

Shell very thin and delicate, oblong, beaks nearly central,
low; anterior and basal margins rounded, posterior truncate ;
umbonal ridge angulated distinctly but not sharply ; surface
with fine concentric lines of growth, strongest posteriorly, and
with very beautiful, regularly spaced, ornamental striee which
anteriorly are concentric, soon become oblique, sloping down-
wards at variance with the growth-lines, then suddenly end after
crossing the center of the valve and on approaching the umbonal
ridge ; the sculpture of the right and left valve is similar ; hinge
teeth delicate but distinct ; no internal strengthening rays are
present. Length 26, altitude 18, semidiameter 3 mm.

This pretty species is strikingly like specimens in the New-
comb collection labelled 7. delzcatula Deshayes from Panama and
from the Gulf of California. Our fossils undoubtedly represent
the ancestral stock of this recent West Coast shell.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Abund-
ant). ;

389 DoMINICAN FossiLts-—MAuURY 225

Tellina (Scissula) scitula Dall

Plate 38, Figure 12

Tellina (Scissula) scitula Dall, Trans. Wagner Inst. Sci., vol. 3, pt.
5, p- 1028, 1900.

Shell small, rounded anteriorly, moderately pointed poster-
iorly ; surface with fine, close striz, extending obliquely back-
ward towards the base, and faint microscopic radial striations ;
no interior thickened rays. Length of a large shell 8, altitude
4.50, diameter 1.5mm. The majority are about 7 mm. long.
Resembling 7. zrzs Say, but with finer, closer, more oblique striz
and more pointed posterior end. Described from Santo Domingo
and Bowden.

We found this pretty little Tellina exceedingly abundant on
the Mao.

Localities.—Exp’d’16) Bluff 3, Cerceado de Mao (thous-
ands of shells); Zone H, Rio Cana at Caimito (scarce) ; Zone
G, Rio Gurabo at Los Quemados (compararively scarce).

Genus STRIGILLA Turton
Strigilla pisiformis Linné
Plate 39, Figure 6

Tellina pisiformis Linné, Syst. Nat., ed. 10, p. 677, 1758.

Strigilia pisiformis Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 249,
1873.

ee pisiformis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 5, p.
1038, 1900.

We obtained hundreds of young shells of this species from
the river bluffs which seem identical with those from the Monte
Cristi, beach. The latter, however, are prettily stained on the
center of the disc with brilliant rose pink.

Locality. —(Exp’d’16) Bluff 3, Cercado de Mao.

Strigilla caimitica, n. sp.
Plate 39, Figure 7

We collected a single valve of a Strigilla so exquisitely
sculptured that although imperfect it seems worthy of descrip-

226 BULLETIN 29 390

tion. The shell is broadly ovate, slightly produced in form, or-
namented by three diverse sets of impressed lines. The first con-
sists of a series of parallel sharply ridged, undulating, or ziczac
lines with a general concentric trend ; the second which decorates
the center of the valve consists of steeply oblique, parallel im-
pressed lines ; the third set which covers the produced portion
of the valve consists of fine, distinct strize which are concentric
near the dorsal margin of the shell but suddenly alter their direc-
_ tion so as to be nearly vertical. Length 16, approximate altitude
14, semidiameter 3 mm.
Locality—(Exp’d ’16) Zone H, Rio Cana at Caimito.

Genus Metis H. and A. Adams
Metis trinttaria Dall
Metis trinitaria Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 5, pp. 1041,
pl. 46, fig. 24, 1900.
Cf. Tellina biplicata Guppy, Quart. Jour. Geol. Soc. London, vol. 32,
p. 530, 1876. Not of Conrad.

Probably the shell in the Heneken collection referred by
Guppy to 7. diflicata should be classed as this species. We did
not collect any shells of this type but they are to be looked for
in Dominican collections. The species is reported by Dall from
the Caroni series of Trinidad and near Santiago de Cuba.. It is
recognized by its rounded, jpvoduced anterior end and very short,
sharply folded posterior end. Length 52, altitudea1, diameter
19, but it may attain twice these measurements.

Genus Macoma Leach

Macoma cf. constricta Bruguiére

Solen constrictus Bruguiére, Mém. Soc. Hist. Nat., vol. I, p. 126, no. 3,

1799.

Tellina (Macoma) constricta Gabb, Trans. Amer. Phil. Soc., vol. 15,
Pp. 249, 1873.

Macoma constricta Dall, Trans. Wagner Inst., vol. 3, pt. 5, p. 1050,
1900.

We collected a fragmentary fossil shell, probably similar to
that which Gabb obtained and referred to M7. constricta. Our

301 DOMINICAN FossiI1s—MaAury 227

specimen is imperfect and we lack shells of constricfa for compar-

ison; but while it is of the same general type it is very doubtful

if the fossil is really identical with constracta.
Locality,—(Exp’d’16) Zone I, Rio Cana at Caimito.

Macoma (Psammacoma) yaquensts, n. sp.
Plate 39, Figure 8

Shell rather small, thin, compressed, beaks low, pointed ;
anterior end longer than the posterior, rounded ; posterior end
feebly angulated, bluntly terminated ; surface smooth except for
fine growth-lines ; cardinal teeth sharp, hinge delicate. Length
17.5, altitude 9.5, semidiameter 1.5 mm. This species is is near-
est to WV. tracta Dall from Chipola, Florida and Bowden, but is
nearly a third larger and differs somewhat in form.

Locality. —(Exp’d ’16) Bluff 3 Cercado de Mao.

Macoma (Cymatoica) hispaniole, n. sp.
Plate 39, Figure 9

Shell small, inequivalve, rostrate and gaping posteriorly ;
rounded and gently convex anteriorly ; left valve slightly shorter
than the right, hardly sulcate posteriorly, shortly rostrate, mark-
edly truncate ; right valve strikingly rostrate and flexuous pos-
teriorly ; both valves with feeble, irregular concentric sculpture
except on the posterior part of the right valve where there are
about eight short, crested waves. Length to, altitude 5.50,
semidiameter 1.50mm. The species most resembling our shell is
M. Vendryest Dall from Bowden.

Locality.— (Exp’d ’16) Bluff 3, Cercado de Mao.

Genus SEMELE Schumacher

Semele Claytont, n. sp.
Plate 35, Figure 9
Shell very large and fine, of the same general type as S.

perlamellosa Heilprin and S. Leana Dall, and in outline some-
what intermediate between these species. It is less elliptical and

228 BULLETIN 29 392

proportionally higher than Heilprin’s figure of the type of perla-
mellosa, with more prominent beaks. The umbonal ridge is
slightly curving resembling that of S. Leana; the entire surface
is ornamented with very regular sharp, concentric lamelle, on
the center of the disc there are about eight to every ten mille-
meters while in perlamellosa there are about ten ; radial strice
very faint, much closer thanin pevlamellosa. Length 66, altitude
55, semidiameterg mm. ‘The interior of the valve is concealed
by a hard matrix. :

This very beautiful shell is the first of the genus ever found
in the Santo Domingo blue clays though Gabb reported S. vavie-
gata Lamarck from the Post Pliocene Coast limestone at Macoris.
Our shell is named in honor of Mr. H. H. Clayton of the Meteoro-
logical Bureau, Buenos Aires, asa token of highest regard and
friendship.

Localities —(Exp’d ’16) Zone I, Rio Cana at Caimito ;
Bluff 2, Cercado de Mao.

Genus PSAMMOSOLEN Risso
Psammosolen Sanctt-Dominici, n. sp.
Plate 37, Figure 13

Shell thin, delicate, with a broad shallow sulcus passing from
the umbo to the ventral margin ; dorsal and ventral margins sub-
rectilinear, almost parallel; surface marked by occasional, concen-
tric growth lines, and very elegantly chiseled with close-set,
slightly wavy, parallel, incised lines which run in an oblique direc-
tion over the posterior and central part of the valve, but at the
anterior end their distal ends turn forwards and upwards in
graceful curves ; very near the anterior dorsal margin the incised
lines are obsolete. Although all our specimens show very nearly
the same sculpturing, this may not be a very constant character.
Pallial sinus tongue-shaped, very deep, extending forward into
the anterior third of the valve. Length of shell 27, altitude 12,
semidiameter 4mm.

P. vicksburgensis Aldrich is listed by Dall from Bowden, but
our shell hasan elegance and precision of form and sculpture

393 DoMINICAN Fosstts—MAvuRY 229

wholly unlike the representation of that species. From the Plio-
cene to recent P. Cumingianus Dunker (multzlineatus Dall) our
shell differs in its smaller size; its beaks are more anterior ; and
the whole shell is proportionately shorter than that species.
Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Scarce).

Genus Donax Linné

Donax equalis Gabb
Plate 39,Figures Io, II
Donax aqualis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 249, 1873.
Donax equalis Dall, Trans. Wagner Inst. Sci. vol. 3, pt. 5, p. 966,
1g00 ; pt. 6, p. 1587, 1903.
Gabb had but a single small valve measuring 6X4.75 mm.
We have seven, the smallest 64.50 and the largest 9 X 6.50, in-
dicating that asthe shell increases in size the length becomes
proportionally slightly greater. This species has never heretofore
been figured. It also occurs at Bowden.
Localities. —(Exp’d’16) Bluff 3, Cercado de Mao (6 valves);
Zone H, Rio Cana at Caimito (a single shell).

Genus SANGUINOLARIA Lamarck
Sanguinolaria (Psammotella) Smithwoodwardt, n. sp.
Plate 38, Figures I, 2

Our fossils very closely resemble recent specimens of P. oper-
culata Gmelin (rufescens Chemnitz) from the Pacific coast at
Acapulco, Mexico. This shell has been usually referred to the
genus Zellina, but Dr. Dall has pointed out that its true affinities
are with Sanguinolaria, section Psammotella.

Our shells are rostate, inequivalve, the left valve greatly
compressed, very flat; right valve gently convex especially an-
teriorly ; although we found ten left valves we collected only a
single right valve and its interior is concealed by the matrix, its
surface is very smooth, marked only with very fine, concentric
stric and faint, obsolete, microscopic radial lines ; umbonal ridge
with a shallow, narrow sulcus along its crest anda broad undula-
tory sulcus in front of the ridge ; left valve marked only by deli-

230 BULLETIN 29 394

cate concentric strize most apparent on the low umbonal ridge,
anterior to the ridge is a broad sulcus corresponding to that of
the right valve ; pallial sinus deep, widest near its central por-
tion, narrower anteriorly, confluent with the pallial line for a
considerable distance ; cardinal teeth two, the anterior heavy,
strongly bifid. Length of right valve 49, altitude 25, diameter 6 ;
corresponding measurements of a left valve are 55 X26X 4 mm.

A beautiful and striking shell, immediately recognized by
its rostrate and discrepant valves. It is named in honor of Dr.
A. Smith Woodward of the British Museum.

Localities.— (Exp’d ’16) Bluff 3, Cercado de Mao; Zones
H and I, Rio Cana at Caimito.

Genus SoLEn Linné

Solen (Solena) obliquus Spengler

Solen obliquus Spengler, 1794. Not of Sowerby 1844.

We collected a fragment of a Solen which exactly matches
specimens of the recent S. obliguus collected on the Monte Cristi
beach. Our fossil shows the distal half of a large shell. Un-
fortunately the hinge characters are not known, but judging from
what we have, the fossil and recent shells are identical. The genus
has not heretofore been found in the blue clays of Santo Do-
mingo. ,

Locality.—(Exp’d’ 16) Zone I, Rio Cana at Caimito.

Genus S1L1gUA Megerle von Muhlfeldt
Siligua subequalis Gabb

Plate 39, Figure 12
Siligua subequalis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 247,
1873.
Siligua subequalis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 5, p. 956.
Igoo.
A delicate, translucent shell characterized by its nearly cen-
tral beaks. Exterior marked only by concentric lines ; polished ;

3905 DoMINICAN FossiLts—MAuRY BAI

main interior rib passing more or less obliquely from the beak
towards the straight ventral margin. Length 24, altitude 1o,
semidiameter 2 mm. ; a larger shell measures 32 X 12.
Fragments from the Chipola beds, Florida, have been doubt-
fully referred to this species.
Localities—(Exp’d ’16) Bluff 3, Cercado de Mao; Zone H,
Rio Cana at Caimito.

Genus Macrra (Linné) Lamarck
Mactra (Mactrella) cf. alata Spengler

Mactra alata Spengler, Skrivt. Nat. Selsk., vol. 5, pt. 2, p. 99.

Mactrella alata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 248, 1873.

Macira alata Dall and Simpson, Bull. U. S. Fish. Comm., vol. 20, pt.
I, p. 474, 1900.

We found a fossil shell which may be the young of J/. alata
of which our party gathered many large, fine specimens on the
Monte Cristi beach. Gabb remarks that his fossils were also
small, but in other respects resembled the recent which then was
recorded only from the West coast of Columbia. Later it was
found by Gundlach in Porto Rico.

Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao.

Genus CorsBuLA Lamarck

Corbula ( Aloidis) vieta Guppy
Plate 39, Figure 13
Corbula vieta Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.
580, pl. 26, fig. 8, 1866. (Right valve).
Erycina tensa Guppy, /d., p. 582, pl. 26, fig. 6, 1866. (Left valve).
Corbula disparilis Gabb Trans. Amer. Phil. Soc., vol. 15, p, 247, 1873.
Not dtsparilis d’Crbigny 1845.
Corbula vieta Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 530, 1876.
Corbula (Aloidis) vieta Dall, Trans. Wagner Inst. vol. 3, pt. 4, p.
849, 1898.
We have about half a dozen right valves of this species, the
largest measuring in length 10, altitude 10, semidiameter 5.5 mm.
The majority are much smaller. The left valve is very different

232 BULLETIN 29 39&

and was erroneously referred by Guppy to Exycina tensa. The
type locality is Manzanilla, Trinidad. Also found at Bowden
and in the Trinidad and Costa Rican Pliocene.

Localities. —(Exp’d ’16) Bluff 2, Cercado de Mao; Zone
I, Rio Cana at Caimito.

Corbula (Cuneocorbula) dominicensis Gabb

Plate 39, Figures 14, 15
Corbula Dominicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 247,

1873.
Corbula (Cuneocorbula) Dall, Trans. Wagner Inst. Sci., vol. 3, pt.

4, p. 847, 1898.

Shell about the size of Bothrocorbula viminea but without
the lunular pit, more finely sculptured, flatter and thinner. The
two valves are very nearly alike, moderately convex, posterior
end angulated, beaks sub-central. Length of left valve 13.5, alti-
tude 9, semidiameter 4 mm. This species has not heretofore
been figured but our shells agree with Gabb’s description.

Locality.—(Exp’d '16) Sandy clay and Zone H, Rio Cana
at Caimito.

Corbula (Cuneocorbula) cercadica, n. sp.
Plate 39, Figures 16, 17

Cf. Corbula Lavaleana Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 247,
1873. Not C. Lavaleana d’Orbigny 1845.

Thousands of valves of a small Cordula were collected by
us at Cercado where it is extremely abundant. This is probably
the species of which Gabb also found a large number and referred
to the recent C. Larvaleana d’Orbigny. But it is smaller than
that species and differs markedly in its broader and much less
elevated beaks. Our shellis very finely concentrically sculp-
tured and some specimens show faint radial strie asin C. Lava-
leana. From the Bowden C. sericea Dall, our shell differs in be-
ing less short and high, proportionally longer and in lacking the
profound sulcation anterior to the umbonal ridge characteristic
of the Bowden shell. The valves of this very abundant Domini-
can species are discrepant, the left smaller and shorter, not

397 DOMINICAN FossiILs-—MAURY 233

reaching the posterior end of the right valve. A large shell meas-
ures 6.5 in length, 4.75 altitude, 2 mm. semidiameter, but the
great majority are smaller.

Locality. —(Exp’d ’16) Bluff 3, Cercado de Mao.

Corbula (Cuneocorbula) caimitica, n. sp.
Plate 39, Figures 18, 19

? Corbula contracta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 247,
1873. Not C. contracta Say, 1822.

Gabb lists Corbula contvacta in his Santo Domingo Report,
but none of the specimens we coliected agree with our specimens
of C. contracta from the Carolinian Pliocene. Moreover, fide
Dall the latter species does not occur anterior to the Pliocene.
We have a few valves from Rio Cana perhaps identical with
what Gabb called contracta. They are, however, more like
d’Orbigny’s figure of the recent C. carvibea, but our fossils are
more sinuous, contracted and pointed posteriorly. Slightly larger
than C. cercadica and differing in outline, they are readily distin-
guished by their much sharper and stronger concentric sculpture.
Valves discrepant, the left being smaller and flatter. A large
right valve measures in length 7, altitude 4.75, semidiameter
3 mm.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito.

Corbula (Bothrocorbula) viminea Guppy
Plate 39, Figures 20, 21

Corbula viminea Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.
293, pl. 18, fig. 11, 1866.

Bothrocorbula viminea Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 247,
1873.

Corbula viminea Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 529,
1876.

Corbula ( Bothrocorbula)viminea Dall, Trans. Wagner Inst. Sci., vol.
3, pt. 4, p. 850, 1808.

This species is remarkable for a very deep sub-circular, lun-

ular pit directly in front of the beak. Because of this Gabb

234 howe BULLETIN 29 308

created for the species the genus Sothrocorbula, considered by
Guppy and by Dall as only of sectional or subgeneric value
since a connecting series leads without break to Czneocorbula.
_Some aged individuals in our collection have become greatly
thickened and inflated so as to appear pathologic. Length 16,
altitude 10.5, semidiameter 4; a greatly thickened valve meas-
ures 16X11 X9 mm.

First described from Jamaica, this species is also reported -
from Vamos-Vamos Station, Panama.

Localities.—(Exp’d’16) Bluff 3, Cercado de Mao; Zone G,
Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito.
(Rather common).

Genus Marrrsia Leach
Martesta Sancti-Dominici, n. sp..
Plate 39, Figure 22

Shell small, ovate, with accessory dorsal and ventral valves ;
lateral valves with a nearly central, oblique deep groove, anterior
to which the valve is sculptured with exceedingly close, fine,
sharp and smooth, concentric threads, not crenulate, there being
no trace of radials ; posterior to the groove the concentric sculp-
ture is lacking and the surface smooth except for fine, irregular
growth striz. Length of shell 11, altitude 7, diameter 7.25 mm.

The only species described heretofore from the Antillean Oli-
gocene is YW. sphevoidalis Guppy, and Dall thinks that should
probably be referred to another group.. This species and the one
described below are apparently true J/artesias. Gabb mentions
finding a small (/aréesca, but imperfect and showing no trace of
the accessory valve.

Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito.
(Rare).

Martesia Sanctt- Pauli, n. sp.

Plate 29, Figure 23

Shell showing clearly dorsal and ventral accessory plates ;
small, oblong, with an external oblique groove forming an internal

399 DomINICAN FossiLs—Mavury 235

rib, dividing the shell into a slightly shorter anterior and longer
posterior portion ; the surface anterior to the groove is sculptured
with extremely fine, sharp, concentric threads prettily crenulated
by their intersection with fine radial impressed lines ; on ap-
proaching the groove the radials abruptly end ; the posterior por-
tion of the valve is ornamented onlv with concentric lines set at
an angie to the anterior lines and about twice as far apart.
Length 8, altitude 5, semidiameter 3 mm. ;
Locality —Exp’d ’16) Bluff 3, Cercado de Mao. (Rare).

Genus TEREDO Linné
Teredo tncrassata Gabb

Plate 39, Figure 24

Kuphus tucrassatus Gabb, Trans. ener Phil, Soc:, vol. 15, -p.- 246,
1873; Jour. Acad. Nat. Sci. Phila., vol. 8, new. ser. p. 342, pl. 44,

fig. 12 a-e.

Teredo fistula? Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p.
529, 1876.

Teredo incrassata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p.
1587, 1903.

These tubes were first seen loose on the road from Los Que-
mados to Caimito. They were several feet long and at first
glance appeared to be exposed roots of trees. They are frequent-
ly incrusted with a hydrocoralline. Gabb found them east of
Guayubin and in the Sambas.

Localities. —(Exp’d ’16) Teredo limestone, above the
Arca patricia beds, Rio Cana at Caimito (scattered through the
soft yellowish limestone); Bluff 3, Cercado de Mao (compara-
tively rare); Samba Hills, approximate altitude 540 feet.

Printed April 27,1917

Fig.

ea)
re)

Lon!

EXPLANATION OF PLATES

Figures natural size unless the dimensions indicate otherwise.

Seo On Oe Os

9.0 MAY DARY YZ

PEATE 3:

Page
INCtECON MIOMACTSIS, siSp yy lots As ti eee. wee aaecee sc eencsene II
Acteociia canaliewlata; Says lon. aimee ease teens ce cnaeee sc 13
ACLeOcina rectal d Ox bi gtiyealo iy 205) Mire see ne ee eee eens eee eeneet 14
Acteocina (Cylichnella) triticum-tritonis, n. sp., lon. 3mm... 14
Volvula cylindrica ‘Gabby lon. Amin: sereraeencore pec seee-eseeeeeinee 16
NetusaTyagquensisians isp! lomlses SO ttle ree eaceroeaeerecce neat: 17
Atys doliolumy micp dono. 7/5) Min eesscscsncsceeccece vase cen see ena se 18
Bullaria paupercula Sowerby, lon. 21 mM...............ceseceeeesee 18
Bullaria Sarah berlineras.aahusposewscdeucue ccc scer sce seca seces emer 19
Bullaria granosa Sowerby, lon. 22 MM........-....cecceeeeeeeceeceeses 20
Bullariaysranosa, Sowerby. lomii22) tart ser en sceeseadaec neon ene ceeecr 20
Ringicila dominicanatiysp.. lot. mas mies ces-ceeosaseeeee ers 21
Merebrarsulcifera ‘Sowerby anise d.cseccseecnececce seasee ree eee ences 22
Merebra sulcitera Sowerby, Chipolanm week secre pees ce see ae 22
herebray bipartita: Sowerby. <2 80.9, 4. seaccesers serene acer aeeesee eae 23
herebratspiritera Dalles ykke Meebo Mem Buen Guten cone as ce einen 24
Merebra\ spiritenac Dalle: mt cece NU an pe nnMN Ee Aisa Me eee a ames ae ne 24
Mere bravcirris sally. cages Woled ska nNa aeN Se Wesley gh Wei cena 25
herebravolipomuitrap Wall we con ian seit tice aN ech seamen e 26
Terebra gausapata leevifasciola, n. var., lon. 18 mm............... 27
herebraiWambiarsoiy 1s, Spa. Lom send ata ee serene eee nes oeeee cee 27
Terebra amitra Dall, after Dall, lon. 9.5.mm.............c0sscoesee- 28

Plate 4.

Page
Merebra protextay Conrady lores 2 simtnese eeeeee seco ce ee ee eeeenarece 28
Merebranimesdualis' Sowerby. c. hesvesesesncee ten nesraneeoseecarceseeee eee 29
Terebra thartensis Malle Mead holes Sea oa ace Men earner mes Se 30
Mere bray Puts MSP. tscrevacnec on cee face atua toe aieh eae Seen weir ease 31
Merebra, patunen sisi a oul als cucuetecee cere ates ae asec ae Me saemr na eae ai
MerebranWoliganodsoula see cae etre ntesecschenc ce sondern ee eects 33
herebraBerlinerdes jm iS pagy esi urns su sew er en cuem UCN eae Meee ana 34
Merebra: Berlinerce igs p eaee see ae meee anaes eee Maeno vec ims aera 34
Conusmiaytensis curabensish taiyalees ee sent seen eee nara eeen ee eee 35

Conus symmetricus domingensis Sowerby................scecesscees 37

401

Fig.

DOMINICAN FossiILS—MAURY 237

Plate 5.
Page
Te CONUS Hay LeHSISESOw ehDiyacsusesaecssemcecnece cine canaemon secant neces 35
Dee CONUS IW il liam galp pig Me SProja.<.sccnes.s see cecoenetacnscnscseasaaapweeace 36
Beg | COMUS SEWAl li ptky SPresssccumassnacsteilarc sete ce seemntee neee techie sas eaee 37
Arn COMMISH CATCH ALI SE SOM CED aasccne neat neces eraser erie eee seeereceecersce 38

Plate 6.
Page
Hey CONMSICALETALUIS) SOWELDIn sss cher seat tsenee ol eecenec net attes ccna 38
2. Conus catenatus Sowerby, like type..............2...2cescceeec eee esees 38
Sp CovanlSs SreneWlbl, 0), Sj o) sr cocuoadodacanockesenosorosoesovoodounboe HobasuesDeGob0r a7
A COMMSSLSHOSLOMIUS SOWEED)eeare setae ace seen cele adee sects -a-c= 39
5. Conus consobrinus Sowerby, young..............cscesecesencenereeceees 39
Dp, (COSTS COIS) OF aIeIES Qoy Sse] V7. sc peuascoodoscoosueagacocon as sso voneDcoDaDoe 39
foe CONUS STAnNOZOnAtroldes mls Spe ecea se ecesa see ecee esse ec rec sell 39
8 Conus gracilissimus Guppy, fide Gabb...........0...0ecceeeeeneer eee 40
os Conusitortwosostriatus doulas seere eee ees eee eee escece sone seeecies 4i
to. Conus ornatus (Gabb’s name), nm. sp:-..-..:..::---...--9-< RODREGECEAE 4I
Init, (Ceoyanwts FOROS JENWASS) sccnocoucgdoccas oquodedesacouccapepcdosemoondooastouene 42
ni, (QoS Weyerya enh ane Coksancseoadosnabsnéoconcncdnousecn quodeonceod’ nonbecedane 42

Plate 7.
Page
I. Conus furvoides Gabb, with color design.............00..sscseeeceeees 42
De (COrayeis bin ONGlKSS) (EP 5) oy. opudcotorvcdsocanocciooagoouncd seonondopebooNGaDdeKou A2
a. (Crombie Ollesyoronl, sols Cio cbgonadeqadedpcasscecoudecosbucedeHocdbooodocqognoG[o3doc 43
ie (QOvinTG CEHCANGIEIENS), Tile: FDacaoccacecoosacacaecooco bon bubonendocondecsbcubsocKee 43
Ba (COLNE IXnaeACEREL, Tals SDaconeccasndocoscocqssoccbosocodobocouoaouscsuaonssonG 44
Grn CONUS HKG Et ered pel mvatle tins racanesteeeeeene earecee se eetreeacaceite t= 44
Flo (COMBE QyaMTINE TACOS GOWVESA OW onsaccocconcace scones coaspopacsnooccoHdocndedac 26
7a. Conus symmetricus Sowerby, approaching domingensis......... 36
8. Conus symmetricussemiobsoletus, . VAaLr..............2cccceeeseensens i
O, (COMUIS TRECOVTIaNIANIS (Crm OPOW Me dc dcoconsooceoobsdaccuonogooUHeadeus ngEunocouC once 45
10, Conus planilinatus SOWELDY :2..5.c:.c+.ecserecesnensessnemenseieerenssing-== 45
hits (CHONG) pase Nea NTE HESS SOMES Dy 7aonocqconpncoousossHe cas bboscoboqnde decosuodcoKe 46
rip, (Casanwksy fefsyAe) \i@)au eon) Buavels I24U CG) 2 /oenocpaqocascancucoco: coacoocce adbeoceorc 46
im (Coyanes Ios BxerAie: (CA)0) Di.gens-ccnobsorn succbcrcn- bee oconno de: eonpaepoceeHoccanuce 47
ily (Cores Ievaleyel avons holy als. Slekccoconcodenooodoonstococondsdocbandoacquunsbcoede 47
Tie KCraya eS ID By Ub Anos Fiero coppodontccocomboncueqaddosodsudo0e socoeriopoconaddaoonadc 48

Fig.

BULLETIN 2g 402
Plate 8
Page
Le A SULCH Ay fagensts SOWeEDYa-cee sete ees ence eee eeacee Sree eee ee 48
Fy Shove ley, ikeijovencey (Grioios. Ievaty AAG) saabame 21/492 so opaedmodononsencsacousoocosee 49
2c SOUL CHa TIOMBONIS Me) Spina siti wane eer epee ae Oncaea ena 49
Ast, Mulerisvalbidamaitensis'Sowenby esac scasetscee es cee eee eee 50
5.) hurhisalbida) BarrettiaG wppy.c.ccc cosas. serene enceeeaseasee na scaese ees 50
62° Turnsalbida virgo Wwamarekiw osc. ssescccsscusecre keene ance eeescentereee: 51
Feo alurrisyali dar celle am) allure acwaks 2 Manson lee cian ener aes Meme ease ea 51
Soy shurnispal picavartillarmsrds Crosseyeessteeeecancsee eee eee eee REE Re ETe 51
9, Borsonia vaticosa Sowerby, Lomi) 5 time. nose oredr 51
TOW sriliiatusiforndissG alban sae ee ec ee eee eee eee eo eee 51
Pee riliahusitormisiG ab bs ome pO midi ceeeeeee Weer ee eee eer ee sees 51
12 PO rilliarcercad omits, GH ASP, Oise 2irar Ti eee eee nee nneeeeas ee acters 52
Lay WD raliayviemtsta SOW ELD yp ness-casea eee cece ater ae ene ee eee conse 52
TAL DO rilliacemustanSowerbiyeeer cscs settee ne eee ees eee By Relea scars 52
LSet oo) rill ia COMSOLSESO WELD Va mramsassceeceroee sen ceeeaen chee e come een se eneee cee 53
LOYD rillltavconSorsy SOWelDyaetascensasssese eee eee eee ee eee eee: 53
17) aD rilliavilienekeninSowenby ees ere cde essen eee ese rep eee eee sees 53
1G, DriliiavHenckeni« Sowerby west kee eee ren ces 53
Plate a.
Page
ie Drilliaisqumam Osan alos egads. aaa sess cor caclasnaconenetdesacec anes 54
ha. Drillia.squamosa Gabbe, nec ssecacteechcaceccistere ceustenseticowencenttms 54
2 Ss Drallial rio gicalbo nissan Spy Nil Olas Tip MATT eee eeseeae ee eeedacc here 54
Bou) Drilliadosquemadica isp slo homie eeeecseeeeesccuerceecences 55
3a. Orillia Josquemadica, a. Spc. ebos.u) oe sects 55
4. Drallia, Donalbertomis, misp., lomji355 Amita led se sscasneetesesseene 55
5. Drillia maonisriparum, n. sp., lon. 9.5 MM...............cceee neces 56
62) Drillvahispaniolee,n.isp. clon iqnd tem os yen eee eee 56
Geo Wraillia dslalind cextna Spiel Otay sey raat ee eee senda neeee cee tee bites 57
So aClavaiplebeta Soweubyztcaascssatecasaia- see nee esasee- Mose seer ceases ras 57
SiaxClavaiplebeiarSowerbiyencccescaccenseece eee cece orese sess sees deserter eae 57
Siba@lavaypleberaiSowerbiygen-eeaeee oeeee eee cceac ere asec nee eoecceeeeears 57
9: @Mangedliatmaoicawia spi nl Oty Aummrme athe tates teee oles raster seer 58
TOs MeanetliasWalomiss me iSpy lOi 76) manne eersseeeees scenes eee cereeces 58
ites (Oyblavangay smo oya (Crngoyoyy, Ikoyaly’ 23,6). sasbanls go jsenbaqca ssoobsoGoocdcncsencsso0e 59
12.) 1 Cythara:elongatayiGalbb, lon Or5) tlt sscecneseee cet ees eee eee se 59
125) (Cythara poly vonaGabbjlome mnie ime sniecheosesesseceseecenace 60
TAL Cy thara carmibicarstiesp lon eM Ommttness <tc cee eeeeeh stones consis 60
15s Gyithanaccercadicarat iSp. loi mAs anaes eee ens. cee eee ttsee salaact 6
16. Glyphostoma dentifera Gabb, metatype, lon. 24 mm.............. 61
17. Glyphostoma golfoyaquensis, n. sp., lon. 12 mm................... 61

403

Fig.

DoMINICAN FossIts—MAuRyY 230

17 as Glyphostoma, solfoyaquensis,) My Spsc.msscpsecssessssee-bee see sence ses 61
8. Clathurella Vendryesiana Dall, lon. 14 mim....................000:- 62

Plate Io.

Page

Te Cantceliariay Barcre tity Gilppiyeseesatsee eco ecco s erates au iene wemesaaieiies 62
2. Cancellaria Rowelli Dall, After Dall, lon. 25 mm................. 63
aoe Cancellaniasepistomiteras Guppy camsiacees Cease asececeese ese 63
An Caneellarianepistomitehda Guppy cccesaeecece testcase sees eco sameness 63
5 Cancellariaepistomifera variety <i. iccdecw cote. cae eee toceten Sue ene 63
oviCancellariaclzevescensn' Guppy saosin st dec oe no nee eaece seston seine 64
7. Cancellatia Guppy: Gabb,y metaty pe. -.22)s22y.0l-sack teen ceeeh enc ssce= 64
Su Cancellariay-Guppyie Gall, ieconees ncsea sete en ee te eevee ten csines 64
on a. Cancellariat ParriSiiy cS pis ssescncosteeeds coer aes ae Seige adeno soaiae se 64
LON Cancelllariamlarcisn inns pes sses yew aa tere 2 heeas ee teach ecto eee 64
11. Cancellaria (Trigonostoma) gurabis, n. sp., lon. 11 mm......... 65
12. Cancellaria (Aphera) islacolonis, n. sp., lon. 14 mmi.............. 65
iia CancellariayAphera)) islacolonis;sntespesnmssecsesce se eeec eee 65
iba Cancellara (CA perdi islacolonis mes pa--. aces tegetescneescepenest es » 65
13. Cancellaria (Narona) losquemadica, n. sp., lon. 13 mm......... 66
in O livarceyzbin diatcalt Sowenbiyets-no ects aor eee cen eenemet a eae oeae aeeee nee 67
Tan Olivas cydimerica Sowerby yOlners crete senaccoasseteeeee see ceaee ees 67
Tee Olivar Cristo valco louise spre Ofte, 42) tira sees ee etese enema ean ae 67
1G Olivacbreyvispita. Gabba etal pec... 50s. css eee accel keanee ener 68
Ejcon Oliv abtevas pita {Gabor cot iccacc vets cece Neueseeesemecenct, soee are 68

Plate 11.

Page

1. Oliveila muticoides Gabb, lon. 13 mm..... at CROMER Dy Dn Nena 68
2. Olivella muticoides canaliculata Gabb, lon. 16 inm.............. 68
Bo Olbrelilen iracunwies) (Cray ojohi, Monae) woahatlawaceconcse-eaaudesteos) aseseede 69
As Olbrreillles Senne! DYoraaryan(or, sol, Gyo), oval) saassels I aner.sens= 4 sanosebae 69
Faw Marcimella cOmmOnmMIS : SOWEDDWtecs.cccues dee tek neae Meal ease denies 70
Bia Marcinellamcomilortiais. SOWeL Diy cat eesiensc cesses een acteed seleciacna ase 70
6. Marginella Christineladde, nu. sp., lon. 19 mm...................... 70
7 aMacoinelila tmaoensis pile SPs 1) LOS LO MAL ick cs cneeaesietenees ter an ofl
8. Marginella hispaniolana, n. sp., lon. 8 mml....................2600 ee 7D
9. Marginella (Persicula) cercadensis, n. sp., lon. 6.5 mm.......... 73
TO), pyres) Fao ol aves ey Syon msc] Oye vs an aeiiotuabdecooas cdeceeoanocacecsbadodosocauone 73
ios WrriapulelellaySowenbiyg iacaeceecueseae esas occassion ese tesa cena see 73,
Lite velMttrarlong an Crab Wesia. ve sesate is adaes ano anee bance eae ca ecica me ae Reese 74
EivaeVidtraslon gal Galbosreceseasaeer: ALLL cls telinca abate eeameiceatade a usbacc 74

240

Fig.

BULLETIN 29 404
b2) Mitra iquemadicaynisp ii. .creueseeeeece erent nase sen ee eee eee eee 75
Leh Matra ctor tuOsa Grab be) Lies oa aE Am anny: BALES ACE) keen atte lie eee 76
PAV id rca stirs Gallo tone ieee vi) Set hl Meee Up UR OINEU oeagin) onlin ea ae ae 75
TAiaaVidtra titan Gallo sare nnee eee Mion aR Sree Sane meee oscene 75
£5. Vitra, Berlitert aa; us pierces etucey ses oan aionet testa tan ena nem en ne aes 76
Loa Vii tray Berlitents Mus mac y ese cyan te tau wens tut Fa Reet Salome maa 76
Plate 12
Page
Ta phsus) Flenelcent) Sowerby ue saree ae rece eres eee ee ate aceon 78
2) HMSUS Helene Kemiubaltensis «SOWeL Diyeeasece pee aces eee sete ess 79
35 HususibenekeniVieatelisnayava te sessseceaee cn aeterieecueseeeee cence 79
A.) Rasciolaria Keim pi Matiy, act seancn-cecressaiee ae eee eect eee oer ee 81
Roe Mitra etene kenii SOweLbye sacnuae ecco se enec eee eC enetee ee acess 74
Haw Matra en ekent SOWenDyaea-ssesec- tenia cece este co eeeae ene eee eee 74
6. Turricula (Costellaria) Bullennewtoni, n. p...............2-------+++- Tel
6a. Turricula (Costellaria) Bullennewtoni, n. sp..................2s008+ Ti
Plate 13.
Page
i wHasciolatia Semistriata, SOWeED Yah... sents custo eee eeeeaereet 80
2, SRasciolatia Carmina mals, MASP cee sensedsctseee obsess sacsasecnes 81
Seve Ibqebe by srarRebarelovel Wun oot (Cyo0Vel bho. osoqocosceusssdesooodoncosoaedodononseccouead 82
AL pegatinus husit orimaiSai Gab bseaseestce tee merie ne cceen conor ene eee 83
5p Can Cusavalidls) SOwerbiyerawecsceseccesseccc ec eee eeocee cat oc ee ee een ee es 83
Gp NEI Naay IONS Nes! Stony Gre Oh ous sodsbogouccseseoosdoseodadobarodaduncésubcbacde 84
Tee Nasi dominicenseourabi CUT ts envateeescactesseteehee ee oe eeee eee 84
Plate 14
Page
i Mitral (Strcatella ee pertunbatiuixsenie |Spye-cesaeeeeaasesee ce nao 76
24 Mitra (Strigatellam)). perturba trix tens praises coos ssc scene ees: 76
2) Plpcheleaicrassilabray (Gallo: tenes: seaeercess eee nee oreo ne sanere aeueeee Tal
Ai Satirus exalis Gab bit eos vee ce oe ee eememans. ae sean anaes Serie 83
5a Velon gena (CONSOLS MSOWELDVjpece ee eee eee eee eee eee ce eee eerie: 85
Gy D2sKors (Expo oynw OLIN Moral AA) ragbtotescocbacddennsososcoGudondoussscanncosododKes 86
7; APR OSH MOOK ily Guppy seo niee soe ss Soe ae eee eee OO
BP GP LHOS MOOLE1 AGU Pryce ee oe ea ee ree Can ene OO
9. - PHOS Gap pyc Ga bbasecsccctesdecm ccteorae tee aoe ae te eee et en OT,
Osea hosyelegans! Grp paulo those oat onan een see eee OO
Ls eLOs MsemitcoOStatus) “Gal Dist e sere eile ee eer ea ee eee emer a OT)

Fig.

12.
13.
14.

I5.
16,
17.
18.

19.

la |
HOO ON Oa & NY

1730

Len NE cen cn ee DO
PHA AA Eg

NbN bY NHN WY Wb
Roe yn s

25.

DoMINICAN Fossiis-—MAuRY 241

Bio sisemicostatisy Gall bsstatseveree cen aaeit sain ak rena pi nu Ta ad 87
IBiTosicostatusi Gab brea cmaseetae eee ee eae see ee Nec iy eine ue 88
BWOStCOStAtUSH Gall besa. Neen neat ee tie ee ees A ARO ORSeaeice 88
Te SASe1 Cl att S gpl) Ul eres crete ters Tarse ans hae Mo aE CE prea ee 88
PHOS RTASCIO | attIS BIE) alll rin one ey carta ne ely Ne Mere bea yee ee nee RCE, 88
Phos metuloides Dall, After Dall, lon. 20 mm...............--2-+0+- 88
CE NEKCUIS TOHBEXONONIGIEIUNS)) Tile, GS) 0), conasonanacsounacupododoqubocoounoncoSedpocosues 83
MetinMlaicancellatas Gabby lom 2a yams wcasseeeeee ten saeaeoaeeeeee ces 85

Plate 15.

Page

Betmachelizal tr ti caltail Gab bees s.0 ee eeaceasenonse saceecen asehiec a maae ss 93
iE chrachelizantruncatas Gab perce. aoceecces Gece se econ ean eos 93
Wisi), WSlAv ang paroles, 50, Os, WOrns Tit TIKIT SHonconssdoconenocoodeneasés 93
MetaspcrplexaiotliS stiaus pei! Olle lio yiiittiyentcees messy asec enenE Ee aree 94
Metayperplexabilis, mi/spieracrsinecacctese eas ccui coder commode enone une 94
Strombina caribeea Gabb, metatype, lon. 9 mm..................... 98
SHACO sal OVE) Cyqayavonatoyab Pe Elavel Vj Soacuaecysocconsence sapeusseuaneoaneeeece 97
SiLOMmbitrareypMOmOLIs le qual fan cateeasc saat eae cnee ene ee nema er 97
StroOmbi nay prisimia ey AMON |tjasessaahcattesectenaces cen cee mince eee 97
jovani] ovbals), joveiisyoole), J, HTC! | oencansodnasscoouasemboc ooddosden soeondacondaode 97
StrombinayNiwestrasenorc,) M.S. lords) Ti habea ee scare eeeneie 98
Stromisinal pseudohaitensis m:ps ome Qeritmaens see aeen nasa 95
StromibinaypseuGdohaitensis sje Speen ee ass sae see We eee armenia 95
Strombina pseudohaitensis gurabensis, n. var., lon. 8 mm...... 95
StromlbiniauNanniepellcsin. Spealotmy ie} sides ease nae eee ee 96
Strombinay Namialebellas tin Spaccsssssasescsesee sna se seere saenee eres 96
StrombinayBassiy ne Spey LOMO tities ecepeseeeae eee eee een Ene 96
Strombina haitensis Sowerby, type, lon. 7 mm..................... 94
INISETACIN GHACUCISAIS, 115 S]Dhp OTals 9/45 Yaak A ooaqbanuuoosososossdebbeosoe 90
NECA OK, CSUCAGIS ISIS, 015, Sj Bossas0 cosuaddoe coucsooadododoososesuonbooadoce: , gO
AEctrionmisirabensSiss tsp.) lms Timi cess serelesssasessesncelae gI
Alectrionvlosduemadiea,, Wa Sp. Otte Siitiiens essen eaten se eeaee QI
Micetrionelosdilemadicaly ne ISP rwacaressastesticstene seme sootcne a aeslae gl
Daher) exolbioy BUG IBISAISNS. sala SOK IU7/ SWOSOL Soo sch oqnayscaadcosconceundocoos 92
TEDW CACO VO EKSGEUS) Tals \GD36. sodsadcevoanascososooacensdddovdseedoononseee 92
Metilellanvyentts tains Owiehoiyen-eeecccenccoeeeee eee tine sees coc eee nee 89
Wieirnleble, speranesies), (SOnySrel Oh og s0cc0e caovecconaonsancuoccsosdeonconpoondocuuK 89
Metulella fusiformis Gabb, lon. 14.25 mml..............0scccecceeesees 89
Metulella Williamgabbi, n. sp., lon. 17 mil................0...0.000- 90

Pa AUINE, ek Ge
Page
MatinexqileSS ODS ms OW ELD Eanes ccdesenceescereecees ese cee aee devaneae IOI

242

Fig.

Lis
Ore

Fig.

ig.

OMI AKUHAW

Io.

NO) Pais OS Ores Eo:

HoH
oH O

HI AREY vo

BULLETIN 29 .406

Ni bubrev< TanKSSOVANES) Slo\n7Sre\ Oh 755 cbse cao soo oduotooooceedodadasoacodesodeorosud IO
Whbhres< KosrouDaKeKeOENS SOnerloncsasncosoordeodaco. couabooraavoosbosodoadeanc® 101
INEHRESe CIC sauNGVEXETOIENS SOywESO OW /ascnaaccaedoaestocaudacunnccsopondesucdbooabeor IOI
Murex domingensis Sowerby, with ribbing like yaquensis..... IO]
Murex domingensis Sowerby, very large 21.2.2... ..deeeseeceereesenes IO
A (bb eteo:<h7 26 [EV eNaT Epis Gh oIAKS OM one ar Ange Greer a pe hanan dae vond sadatar sucBeconHanee 102
Miiuinexcompackisi Gallo manule tay per esceseeree eee ecee eee ceeeeeeee ee 103
Milibuces< (Clavloieinis}) Coreranskrecins, (Cabjoj ony cecdsoscncdsbadaceasdeon odeceto0 103
Miunes< ((Chicoreus) ;cormupectus) Giippiypenmaceessescneceseeccraees 103
Murex (Phyllonotus) preepauxillus, n.sp., lon. 16 mm......... 103
My phisicereadicus ms SPs, Oss 77) TEs feet eccclece «fee aseaee eee eeeee 101

late mig.

Page
Gyamiavelentelee matsp eet te ae coe dea aeee a on eae ene ert cteel eee 104
Simpulum antillarum cercadicum, Ni, Var..........-.sceeereeeeeecee ees 106
Ifotorium practemoraleyine MSpier. or seec ss eee ce Wacee on bene eee ce 106
MiSwerronise Syhaardlbwanes, SOEs Oy 7a ccosedanosonososscocseancodocsoecer ooocuounc 107
IDC Bmp Grasehlbbbaney.. SON gEie Oy fasqdoddodospscdscooc. cedoabebooddspodedooosne 107
Bursaverassal ill wytleeasseeesese st ccsee os anaes ave Gat eatcteacelse seer aise 108.
Bursalerassa WO idwiy tt aes sakeaes sense cent ceae Mee ene Me Oro eee e: 108
Bs bbeaskey i] OVD KOs oKO) OIG STIS NE} Ons Sasa ssuouomcacsausudHa. SoucconceodpuRsoaucoanddaéo 108
Bursa Anipbitrites Vimy Spoeeccectecuen saree doaeeeestece ec aan aneremn ce cele)
Cuttunniumysractle aura omicumy hal nVvatee see ene ee neice eee eine 107
Aspellascalaroides Blatuvilllers ieecnescovseesseensense a eteecc teeter 104

Plate 18.

Page
Cassistsulcitera ‘Sowerby, ya Witenes nescence aeee nepme eee 110
Cassis sulcifera Sowerby, younger, like type..........1.-......000es II9
CaSsisisuilciteral SOweniyzes cemccaue sesec eee eee Ace eee ea ee cee 110
JPiovevbyevan .saavovanlbarembeant (CAwyoyoy74eaaoceodecadacda eacvadoeseoecascacnoocedan 110
Pisa btebont Teovovapllibiersbuan (Cxeyoy OW 7e-ooobscdondhednoonosodadcdesbanocaagcdoooase 110
CoraliliophilasmiocemicaGuppy cores cess tease ae een 105
WMcoreinban) GlosannTaleerMaS SOMES ON7essc6 canconasascnecadcn beodscasboeacdaodo ses 112
MM ormbioa Cl@rooubavexSras - SKONTEHON7eanocsscosodaostiacaoscababsaconsesaceso000008 112

Plate 19.

Page

Phaliun monthiterun reelusmim: “Ging piyeae-s..-ne sor isee seer sere IIo

407

Fig,

Cowan

yer er

DOMINICAN FossiLts—Maury 243

SCONGiall VIGA ta AS OWeL Dives tats. ymecuscsdem sce dance See UNAe one erate Ouc III
Malle ale aitraircan ep yenencctis pt sess) cod anes aes neeiouh tas a See ace OTe?
Cy precay Hen eiwerm aS OWED Keane scuad ons tases neateee ree aie sulsae cueces 114
Crypt ecay NOME IeteA Sia muasay tosses mee eese Ohare tal ae RNa ue) 114
Gyptecans pia cap leit Cece seit acseecereer eee rcs oe miss aes ea area aan cae 115
Cyoreaspurcoides Gabbe mictaty, pec css snaces tasoe eacccareeeneane 115
CypneausplunrcoldesniGab bier senaneeseas seca eco ena secon ae Enea R Ee 115
Cypreea spurcoides Gabb......:.... Hac mieeceicise Hoeisoe saRe Ree ene emeecennee 115
@ypreeal patrespatidae wine Spicanaeeee anteater ae homens eee 116
Cy presardonilmicensisn iG abana cnet estes eee meen ee scenes vy. I16
CypreanGabbiariarG ap pyarices-siecscee soos ere oe eee keer eere 116
Ariviass|obosalGrayeloms 5e5O tunity: one tes eee Lire na II7
Mrivianslanispant(olas sie Sp. sl orbey7 aii seen noe aa ee eee oe 117
Trivia suffusa, var. Sancti-Dominici, n. var., lon. 8 mm........ I17
Plate 20.

Page
Sisrorlong Imemwernels Sones OyssscoconcmsachuacsocssosdedccuaseeedoseGaeosoe 118
SicombusebinnonsE Sowerby eee Sy ee seeds 11g
Stromibus bitromsmSOwien ives. see aise ss ee es oates wes Se esas aes 119
SLIROA ONLI) jONFODrAbOTTIBIS {STONY STO ey cricuogosn sopseobodoadacdsoospudooete oanceoue 119
See saul] OHEIS yoNKORaOMBIS, SKoNyEKIO/eoogcacsocboucoaudoo \sosbosnbesedocesuneauenoe 119
SLLOMbUS pi sdlord esi Grup pry iaye eee wee satlonee seme aise cen Suen een oe 120

Plate 21

Page
SLLOMIV MS) MMAGEMSISK ML mS P.anaacwcueas eeccracweare ssa had dake es monn eee 120
NassarinalOlssomivne spy lone Aes. mitts... sees eeeeeneeleencreaee 88
Nitidellarcibaotcaym Spry LOMs Mac Tdit-csatota cheeses occseeenee cus 99
Nitidellavcibaoica wy Spree. cud cic eeeeteaeceeee ea teh oa eee cc 99
AnachisiexalichG alee loners 1ittssesassece sees eee ee eee 99
Sty TSDC DOOVAR IES PEt Olen Si illinlenecancee ete ess sc. ce eee aaa nie 100
Strombinellaracutormis Malls lone nayritti. ss) ssccebateeeteeoee oe 100
Erato Maugeriz domingensis, n. var., lon. 4 mim................. 118
Crepitaceliatcepula Guppy lots PAs sees eee eee 121
Crepitacella cepula spiralistriata, n. var. I5 mmm.................. 122
Oxrthaulaxcinornatus GablwAtter|Gabbess. cls see eeeee eee 121
Strombina divilitus Eland Mn, yAtter®Gabis.c..c--ss<sseves dscns 98
siritorishCalypsomisy i. Spes Lome Os) TINT eaten ee peece re Satna 122
Werithimainiseriale Sowerbypwncicse:ssessses cee seen oe ae 124
Cemthiam ip anmiserialerSowenrbyen.-o.c.- ees so-m nee tence cane Reeoe 124

Cenithimimobesmiay Guppya. eres tces emer tat enede nee eee hts 124

244

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BULLETIN 29 468

Bithumrasperoides! Galysloms) a nitiikesyenenst oe aera eee en ee 125
Bittiumcanahienlatuni Cabb. lone yale se eee eee eee 126
Rissoima crasstlabriss Calbloyslomens aaaraseeeee ee see aa ee eee 132
Rissoina Sagraiana d’Orbigny, lon. 5 MM.............c0ccseceeeeeeees 132
Plate 22.

Page
Cerithinnemicrolineatu mim Galle eee tence seen ee eee eee 123
(Cercelovybhaal Hl Rebs eNIhty Gals) Os odanadesdsunetocucesous cddoobooesssoboondaayBBOHe De,
(Sree to cot ALYwCR VS Wats) On ceccensacaunenaeeouusacanuoe tanaaodecaciaeadcnses 123
Centhium gurabensesaiaysps lotaamSsmithinesnussa ete seateeec eee ee ees 124
Cerithium), curabense-mma Sprang Guin ttaee ee ate se ee eee mem eees T2
(Cereiorknsen iqaiseerpillithod © (Calo )ospdgaccodgoocabooncasHoo nan shu socosacbousouodes 125
Cerithiumydominicensen Gabba sace eee eee eee eee 125
POL MiIGes Omri MySp aia esas eaaaak cee ieec una o mut eee ee RE 126
SSLSIE| OVEN Copel OMS) sep ENODYKSS Ca SHIN .c sae coccoonde cosanoneHasooosaoodsosoposdduoaoKcS 127
Senpulorbis pap wlosa iGup pyeercccsssesasasecese tee seer ae seeae ce cence 127
Fetaloconchus domingensisnSOwenbiersseieecseee nas eet eee 128
Petaloconchus Laddfrankline, n. sp., lon. 30 mim................. 128
Siliquaxia ourabensis, m1. (sp. "diameter 225 aia eene sa. asses sene 129
Aurrcitellagplaniovratain Gulp piyessersene aise seen ee see eee ace eeeeisee 129
ureitellagtonnatalGup pias seated sce meee eee eee eet cameras 130
Aucraitellaysubmortonisen =| Soe Osa 5 pian tenes eeeee eeece ec reereecace: 130
Ovula (Neosimnia) Wise-Woodze, n. sp., lon. 14 mm............ 113

Plate 23.

Page
Solarium: qnadnisenatunl Sowers cass cesccece nese enee sees 131
Solarium <quadnseratiim: SOWELDY Acar ccascceeeoteceseessee seca ere TEA
Syollarchbbon jsrsvoipllkaycevon, Ibphadebeclke jcsnoscnocosobeccucs annoedconsacsoude ne 131
Solleraqrbon “Siworaesooeaes, Tal, Gjosgesonecosodsoscedosoodauencousessossoasonocuads 132
Sollenaliihual Siuopassaseyaeesy Toy SOs oscoqeatacassenosudsnosadecdocubosoosberecascos 132
Crucibulim (Dispoteea)) ci) pileolumies Cy Wear ty .caereec: 133
Meno phonaconchyiopMoral PRO we eseees asada cee ses eee acee 133
<enophoradelectay Cuppiyjseccessmee ee eames ne eee eseeerce se sees 134
eno ploraydelectas Guppy set een. cave cece dees eecseeese aaa perc: 134
INaticarcanrenamileiarrem (Mor cli)) senate ae aeeeene Sakis Aecunae nena 134
INatica MOM eA TUNIS PD sestae aac esuanecn a suactocemeteopea see ncce Le ee ceyae 135
INatica Yorn gi) tae isp inca dsr aca sersinaias neietesatemcie wee sissiactoseiaeeinetisisee 135
INaticad(Stiemaulax) (Sul cata yBo tie cesce secre seressessescsenec eee 135
iPOlimicesisubclawsal SOWELL Dees ceeereeeos esaee cee eeeees sce esace 136

Polimices; Stanislas-Memmierin mae Spesseeee reseed eecesecreseneeeeeaeeeces 136

409

Fig.

16.
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18.
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DoMmINICAN Fossits—-MAURY 245

Bolinicesistanisias- Meunier. nt) Spitse sincere eaen oesonee 136
INEVERITAUMELEIG IS SPs anie OMe u resem st sade Naar SMR GER SAU eid a 137
INEMERIEAMEKeLGIS HtIeL SP aeeenecesccuacs cose scnucneascmnaeunccconeon eda su 137
ASIN AUELOpsis Gp pyd Gab Dia ural \atowaecaseeanaace she Nome theta 137
AiMauLopsis Guppyl muna DeMSIS Miri VaTy. sca. estos s tetas eee taee 138
Plate 24.

Page
Sinmun sNolaninad spay tla xi latmelQ tiie <.ceeeeree ances oo 139
Sinum gatunense Toula, max. diameter 16 mm.............0000008 138
Epitomium minutissimum Gabb, lon. 5 mm................00.00008 139
E pitomiumriparumn 1e:Speeilone 71MM sess hsicesecec eco seen oe 139
Epitomium cercadicum, n. sp., lon. 6.25 mm.................0000- 140
Epitomium textuvestitum, n.sp., lon. 16 mmt..............0..008. 140
Achisiacuminatoides, cm. Sp. lOn.g 13.0 1itle.,. eases uks.s sche I4I
INGSONSrata dis Gall hacen eech esses casein sae te ait Miata ae ne aay 143
Fe PICO MICA CeXEUNVIES ELULTTE tans Pye ROP ITNTIIG rs ce trae ei eee ae 140
Neritina (Puperita) figulopicta, n. sp., diam. 8 mm.. ........... 152
Neritina (Smaragdia) viridemaris, n. sp., diam. 8 mm........... 152
Phasianella punetata Gabb, lon: Gat: .... 0. c.0.0.0....ecsecceeseeese 153
Piasianelilatpunctatan Gali ies tose csee Manaccenem nar sil oe 153
un boreremmlatordles.: miyy speek 4 se san ahenicenn hc Gan bese) aC 153
Huo ComitmlCensis Wal oi} iil iva tiene re een Nees alae 154
AStrAliEI SHolOm esp Tai taa A SIN cee ie eee acer oe ees mana Gane sake 154
/NSiaeeE) Sh ohaa iin] o} Voy aventey osveRbisoly 201, 4) Osacacsaneatacnowes Suc enREH RR GReGeoREeR 154
JNGEGAY bbb on’ IK AyelKOawaOvVLEL, “1014 \VaNcsccpsdocsnsnose noe ue seseuane saeoesuEsoebe 155
CalhiostomayGrabainy sp eal nGstames. occ senses ee 155
WIS COPSIS HD Cia byyalee tals Speen Cl Teer rates fae oe epee 156
Bissuvidea iene kent. MomSpenrsaceigs ssosee nee earn Grease cwasec eas 157
BiSSurideavallkertiatan Saye -ecee eet asec en eee eee e sete ace ne ene eee 157
Vitrinella (Circulus) striata Gabb, max. diam. 5.50 mm........ 156
Teinostoma sandomingense, n. sp., diam. 4 mm.................... 156

Plate 25.

Page
Melanella (Eulima) cercadica, n. sp., lon. 8.50 mm............... 142
Melanella (EKulima) maoica, n. sp., lon. 4.10 mm..............0.08 142
Melanella (Eulima) jacululum, n.sp., lon. 4.25 mm.............. 143
Melanella (EKulima) Tethyos, n. sp., lon. 6.60 mm................. 143
Byranidella: canaliculatan Gabby lon) rr amrm.:2) eee eee ee 144
Pyramidella semicanaliculata, n. sp., lon. 9.5 mm................ 144

By carmidelia’ diadematal iia Sp: lon, Gy25i maine nes Rene 145

246

Fig.

B® NN H

= Coe ON

Ln cL on Nc ET J |
0 PDIAAHRKRSN A

BULLETIN 29 410

Pyrarmidellak@lssommtsembys psu OM ec@ strata eee eee ne eee eae ee 145
Pyramidella (Callolongchzeus) cercadensis, n. sp., lon. 4.25
500600 RARER oR GSE CHOBCEE Rap HERE ODE COCR ERE CAOe: 146
Pyramidella (Orinella) Arionis, n. sp., lon. 3.25 mm............. 146
Turbonilla (Chemnitzia) Ogilvieze, n. sp., lon. 6.5 mm.......... 147
Turbonilla (Chemnitzia) yaquensis, n. sp., lon. 3.60 mm........ 147
Turbonilla (Chemnitzia) cercadensis, n. sp., lon. 2.5 mm...... 148
Turbonilla (Strioturbonilla) dominicensis Gabb, lon. 6mm... 148
Turbonilla (Pyrgiscus) Karlschmidti, n.sp., lon. 8 mm......... 149
Turbonilla (Pyrgiscus) Olssoni, n. sp., lon. 9.5 mm.............. 149
Turbonilla (Pyrgiscus) turritissima Guppy, lon. 7 mm............ 149
Turbonilla (Pyrgiscus) riomaoénsis, n. sp., lon. 6.5 mm......... 150
Turbonilla (Visma) turritelloides Gabb, lon. 8 mm............... 150
Turbonilla (Mormula) Nanniebelle, n.sp., lon. 7.25 mm...... 150
Odostomia Sancti-Dominici, n. sp., lon. 2.5 mim..............00-6+- 151
@dostomuia) yaquicatmesp poms) 5opmitaaleeeneeasseeneeeelscn eee eee 151
Plate 26
Page
DentalaumiudissimiletGuppys lomsyA gates een eect ceeneeee eee 158
Dentalium dissimile ponderosum Gabb, lon. 60 mm.............. 158
Dentalium Cossmannianum P. and S., lon. 26 mm................. 159
Dentalium glaucoterrarum, n. sp., lon. fo agin ens 159
Cadulus plenax (Pvand iS lomeyiGaimanien isc mesces ace seeeestaseees 160
Cadulus elegantissimus P. and S., lon. 14 mm..................2--0- 160
Cadulus denticulus-tigris, n. sp., lom. 6.25 mm................0..4. 160
INuculajtennisculptatGabbyplomy4s mtieee sees dee nesses eee 161
Teclay joyaliveililen TOY oval; ) Tatas. o5cbe0 cosoeacon coaccnoonddsenodaceooeGooe 161
IimopsisiovaliskGabbylomerSj5i Wit eaneeseeessces-heoscce een e cece 162
imopsisidatovdejonisy.1: Spa, lon: 7) min sees cecemeceerer ec eecse 162
Gliycimernisiacuticostata Sowerby esses estes state eeeeees eee 180
Gly cimens jamaicensismD allie pans ju nessnsecceentceeedteesmeasssee ences 181
PterianinornatanGab breic.css. weseee tase eetes tence cicec ete ttn eeceee te reloeer cnet 181
ATtOnATarsiiplextda Orsolestiyaecsecsese ease tease csseatascec cere eeeeeeees I9I
Modiolwsicercadiciis lise al otis Syed tile nee nerseebeeeeaceeeeee seers 192
Noa bKolhuicy sao Voroulsy, ‘val, Gyo), Woysls 5) s00b00)4 25055 soo onunusaouedsecoosodeD sco snnee 192
Crenella divaricata d’Orbigny, lon. 2.25 mm..................0.006 194
Pandora inconspieuayGabb) dom: Oamiils.s.secasiiceee ese secs emesee 195
Pandora dinconuspienay Galbbieerte nese sacsdenocecosaciseseecesssecesecacste: 195
Cuspidaria islahispaniole, n. sp., lon. Q MIM...........seceee neces 196
CrassinellarGiappyaaDall gloria 5) tine eceesecd acidemia cence 197

/NGoaTOISThUwanl aN On ATACE wba (GAOIDEdaoinaodgeo, obcoaooocadocodoLoonsooconcDoOGe 190

Fig.

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DOMINICAN FossILsS—MAuRY 247

Plate 27.
Page
Scaplanrcaypabei cia Owenbpiyee dears cccee sacstecnosctinaccee sede s 173
Plate 28.
Page
WCAphiancael lar Sa recce wets SP aacsmeen ye seeecen sessee eae e ee leecert seers 169
Scapliarca chiniquiensiS Gain cey.cessscoee sees sceuaasasiebseasceee tes 174
Scapilarcamaum cula tary amare keen scccaencrsesseseeecereecteecsecets 175
QOa ol narea) (UE lloNACZ), Te, _SOococcsasoobonanbocnsobodcosouscacHsadsonend Gee 170
Scaphlancameoltoya dWensisytlySphasccanstacecee cee eeee eee eccee cece 168
PLATE 29.
Page
Gea OAA EGA, UE MO MITNICEY aalg E]Docgadodoo adsaeaAsdocdoogosooopadacHandHodeoas 170
Scapharcarelenekeni (mM yisps cssucscacsacsscscctassecccsenaccaonemcee 167
AE CAROCCIGecalisnoMMla pipiens nescswnsccew eaten saasece ste ececeoec ee atte 163
Scapharcammogunabomicay meus prey esccsrs-cecresee se mee eeree neces 170
Scap Warcay Cercadicassne Spr cess cece etacece se ectecscirccee meena: 169
Scapharca (Cunearca) Williardausteni, n. Sp..............0.....0005 179
Scapharca (Cunearca) Willardausteni, m1. Sp..............-seeceeeee 179
Scaplarcay Pentel Galb basen sencena rece sewca eeeeimesneee ia 177
Scaphiarcay Attar pete lian tabs Spsesenseeeronssnseicee cee eee eerie cee 178
SceapharcayArchunpenmnellmime Sper smce-csscse imeeccceeemcactee sce 178
Plate 30
Page
Scapharca)losquemadicay: waisp-eecacstssceee nsec et tess escaset a: 172
Scapharca Henekeni Sowerby, young shell....................0c00ee- 167
Scapllarca ti Ocanensisimerspye tcacseysvanstmeceemen sence scaninnese gue sares 176
ScapkanrcalrocanenSisumins pa awssensccer ee eee ee eee ener cece eee rons 176
SCaplaar Cay COTr=CUpldOMiS im SP yest ee rec eesacce seater: 175
SCAM ACA, GOO HONCKONSII, Al, SOscacsosconsosuases obacedavnscossuodssueccce 175
S\eayolaaneeay COreseuhoMGlOvawiss, 95 S/Oscaceaqcodenncocooboodonsanscncodnneséaasoc! 175
ScapharcabkineequdlateralissGuppiyeescsssccsssostesacseeeeeeceeaeeees 171
SCaphanrcavhispant Olanmare mens Peacrcenscecessricsseecsecce esse csccaenees 176
Scapharcavinispaniolatramneispiasessoccae eaea te saecee Ieaite ce athiguil 176
ATCayiinM bona tanlatlar kat aymscenscseccseesmeisiiascenaneus aaeaceemercene 163
Ar callomiasd esata twins Prensteeb ease cone sosesi etic aceseemesemanes eee 164
Scapharcatcaimiticaynsespr acc eae eee mecca cesetiad: Sa 72

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BULLETIN 29 42
AEA VACUEHSIS,. 1. Spee) LOMO) MMA ene tec neescee ene aae ene ce nea re 164
Barbatia: eh Bonaczya Gabb;, lom..1) mititesscce s,s. seesecceseeene ence 165
Barbatia, (Acar): reticulata, Gimielimetsscscs ease pee sesesseaeeceaeeoees 166 ©
Noetia’ (Sheldonella)/amacica, m.sps lon: 12) rims .ecss.s. beeen 166
Nocétia (Sheldorella)) amaoica yr Spiecstees-e-caccodneteenasce meceees 166
Sc2 plartcarcibaoica. Heors psa Ol enlulas Ti Ttteeen ress eeeee re eae eee ee neeee 173
Scapliarea etbaotcar nly Spy ces nanan nec ac na eee cerca Rene 173
Plate 31.
Page
Ostrea haitensis Sowerby, reduced, lon. 122 mm................... 182
Ostreavhaitensis| Sowenbiyee-cesssaere ec ecene recente eceece eeceseeere 182
Plate 32.
Page
Ostrea Gilbertharrisi, n. sp., showing hinge, lon. 110 mm...... 182
@streal Gilbentharrisi, mi Spy cssccecseocsseecesececece aecebel leeeeeee sere cee 182
Ostrea Gilbertharrisi, n. sp., interlocking valves..................+. 182
Spondiyilus bostmychites |Gippyer.csacsnsana eccemetecteseeaeaecencnecces 190
Plate 33.
Page
Venericardia scabricostata Guppy, lon. 21 mm..................-+ 198
Venericardia islahispaniole, n. sp, lon. 23 mm..................... 198
Venericardia cerrogordensis, n. sp, lon. 20 mm...................4- 199
ChamaninvolutasGuppypccccccct ostecces:ctes denser teen nenacenedaeeeeteee 199
Chama pinvolutasGippyersesescccossenenccceoesstoseccsten cee teeeenoe srt 199
ChamavinvolutasGuppyeccsececcteeiecro ences cerceeeccieen eee 199
@hatnarcalmrticas tawSpyeesasrs eras ec nstioer oct tae e lear eseeeee eran 199
(Qiawasarey Covalesr een LouGlSS; Sol, G)oanstsosocooshescasswosbascadecodessooaddosdse 200
Chamarriocanica ne Spiescsecnccamaonaease nae taclacsassemneecer aac ence 200
MH ckinochamaantiquatayDalll Mer sets cacseeecereae aces scrs eee assereseie 201
Echinochama antiquata yaquensis, 1. Vat...........2....0.c24.00-c202= 201
Echinochama antiquata yaquemsis, 1. VaL................eseeeee eens 201
Plate 34.
Page
RiacunanomianlithobletamW alles msssccecscsceccccees- cere scorer acceer 192

Placunanomia lithobleta Dall, hinge................... Bona seobooccaues 192

413

Fig.

SOF oS ONO re ole aaa

= A
YH O

2) 3 SS

Io.
Teh

DOMINICAN FOssILS—-MAURY 249

@streammerodontrlianleyseeasaercscuerssoaceeesccetercmenaennee ceca ses 183
JPCUSHT) SNA EAN COVTMATES) JOM UL ceccocneqasuadedoovornedocsecqoccHosgoodosEsGd0s 184
Pecten(euenamm ats Wall se ecscse eck ses ceeriass nscicins sels selsisisee ices 184
Recten abet Gis Sow ety aetacces se ceatacs ec oe sk seeeascaiscmeteitese seine 185
ECS waeraabe lint) IDL, korn, 1G) sabia sc ooncés5cddeabed conbosaGo con 4eseaee 186
PectenkexcentricussGabbwencs-csncacescusedeedscecerseneeenceneciessces ace 187
ea cinesn AEoKopenh SoraH, | Fal) E\O),-oaeunsavocbdoanns sososgscKocedD sasoseuseBedeBocaare 188
PE Cesar IMGVeseAyTSCNINIS Tl, K}0) cesqncnbsensdadosocoomBsoNcsabans nopseceabeouneoe 188
JRECUSTA CS COACHICE; Ts SDaodooccccasseghocboousoscacsounonbe egsepesdsaqanqasc 188
Cus Caria, Ta, GOs, Wore, AS) SAVER, sooo connaccaddegenconsbocosodeosas 189
JACI IHKON AS OU, el, Ga, loi, BA, sooWeos coco neoon0e6 Gooddozdebse0bCo0C 189
JRSCHEST IOENKONAKES OMUIG, IM GPa caso-ohocansconvssseonoseos nacodoogs acosuaonbonade 189
Platess

Page
Codakiavorbicwlaricn Gimmie ceececs pedencescecd- eats cccaaesees 202
ucinarchinysostomam bintlip pit scree aseecee -sraeeeeencecseasreveeaeces 202
Myrtzea lomasdesamba, n. sp, lon. 5.50 MM...............cceee sees 203
Phacoides (Lucinisca’ hispaniolana, n. sp., lon. 11.75........... 204
Phacoides (Lucinisca) cercadica, n. sp., lon. 6 mm............... 204
Phacoides (Miltha) Smithwoodwardi, 1. SPp................ceeseeee 204
Phacoidess(Miilthan pmMoOcanenSishs i. Sprascesasedapeee sede eee ee 205
Phacoides (Parvilucina) yaquensis, n. sp., lon. 3.50 mm........ 206
Semel eyClayitomi sss presses se lacttsesccncien stoceeeneeenececes ote: 227
Divaricella prevaricata Guppy, loms(Simim 0.222... .c.eem--c0-- 203
Botulawaispantolasssnesp yl Ome TOmmmnesas.cesenecicissacssscesiet tise 193
Coralliophagaycoralliophagay Gi eliny cece eee rere ccresacce eee eee 197

PLATE 36.

Page
Cardium (Trachycardium) dominicanum Dall...................602- 209
Cardium (Trachycardium) lingua-tigris, nm. Sp...........e.ee eee eeeee 209
Cardium (Trachycardium) tintinnabularum, alt. 20 mm......... 210
Cardium (Trachycardium) Cinderella, n. sp........... .......2006- 211
Cardium (Trigoniocardia) haitense Sowerby .................-..6+- 211

. Cardium (Trigoniocardia) haitense Sowerby ............... coodacoae 211

Cardium (Trigoniocardia) haitense cercadicum, n. var., alt.

Li7 MITMA SSS euueeteaseesseecccn seers seese cesses 212
Cardium (Trigoniocardia) sambaicum, n. sp., alt. 17 mm........ 212
Cardium (Levicardium) serratum Linné..................0cs0.s-s000 212
Cardium (Lzevicardium) venustum GabD..............:csscseneeeeees 213
Protocardiay Surabica) a. Spiasacedsocsscecseeaseaes cece naseecnaenee sae 213

Protocardia islahispaniole, n. sp., lon. 23 mMm........... .seeseeee 214

250 BULLETIN 29 414

Plate 37.
Page
Fig. 1, Pitaria (Lamelliconcha) circinata Born, lon. 34 mm.............. 215
73, JBEHEEY ACMUOKCOR mI: CMoo, Worm, Wit THRs coscoSabosodaess soacdecasdoCe 216
Bi \Pitanaplanivieta -G uppyiereratessesceecasscacescee ect eee eee eane 217
Av? Antigona-targiuinia: Wallon ey cter ssscccueccecserec peas cee oee eeeceae 217
5. Antigona (Ventricola) Blandiana Guppy.................sssseecserees 217,
6nn ChionewWoodwardi(Guppiyzen aces cae ceceeeeecee cece eee secre ener 218
FG obLosaKen (ee. AWAENOULX Eabh 0} Oh ornocaaaseucseponnaobadununedacdacacocobosonocdosaded 218
822) Chione) @(irophora)Polendersoni: Dalilavias wacanceesceenoecest eee 219
9.) Chione (lirophora)elendersomi Mallee erence seeac ss ance 219
TOs) peitariancercadi cay mn Spy" lots OMminean pees eeeeepaeeadcdnetee seco eee 216
Hho hetmcolaycatmiticay msgsps wl OmeniA: Tmt enss eis cess ese se eeeeeee 219
12. Petricola (Rupellaria) riocanensis, n. sp., lon. 2I mm............ 220
135) | Psainimosolen! Sancti-DomiIMiCiighs SPececcseessssseeliceeesaseheee seco rtes 228

Plate 38.
Page
Fig. 1. Sanguinolaria (Psammotella) Smithwoodwardi, n. sp............ 229
2, Sanguinolaria (Psammotella) Smithwoodwardi. n. sp............ 229
aeeeGhellinar mOcaMmensiSu mln Spy usaeceotesetteasccne tesco enaataee ese ee eee 220
Ante heliiaa: (Vlerisea) crystallina (Chemnitz 05... vseeccstenteacceces 223,
ists LUA) SoneKOR(EA) ale, 21S) Op denne sdsosecosncoscbabyadocndade BbobacssLess Sree 223
Gye aellinanslabispantolwetanes pieces sseteccssccsswe teeters aaaaees 221
Fx udeellbbera ama keyauel yeybkersteholini 01s S) Okun cose occ snapnoondodbous- sanodcadsuos ease 222
Sue Tenbbimey NVENdlehaGhieinvelnveyabl, snl” 5} Dacesoaoand osbosossbconodenancoduscouaceoe 222
oi telltnas(Seissulla))ieercadicani it Sp eamasesd c-tecute ewes aseeienen ence 224
TOs hellMaveibaolCa am Spey lot 2: tttleenteeessneeeseeceasesees seeses eee. 223
11. ‘ellina (Merisca) Sancti-Dominici, n. sp., lon. 11 mm........... 224
12. wbeliananiscissmla)escitulas Dall lon.) ttt, <0), ciuaccueseses scree. 225

Plate 39.
Page
Fig. 1. Diplodonta caputoides Gabb, lon. 4.50 mm................665 weseees 207
a Monta cwkar CeLcaGdicaw Te Spiel OMe Os OOMtatInecenrmeceeeeree reece acces 208
Zu Montactita maa, 1.1SP.,)1OMs 5 LMIMs: eleacaesl---0se cers scm osast 208
4.) Montacuta ispaniolee, nu. sp., loml7/-25) matt ...2- ossceere enn es 209
5. Mytilopsisdomingensis Recluz, lon. 19 MM......................008 195
6s. Strigtlla pistiormis Minne lone G/mitn esses esresee eeere eee 225
Wa StrigiMarcaliiitlCay ide Spr OM iG Milis cease aneesesenats: ponent 225
8. Macoma (Psammacoma) yaquensis, n. sp., lon. 17.5 mm...... 227
9. Macoma (Cymatoica) hispaniole, n. sp) lomeromman ys ace: 227
10.) Wontax cequalis Gabby lon: Onmm ss iiccantecsscsreesewsateuces oe euciacet 229

415

ites
12.
Tee
14.
15.
16.
Ue
18.
19.
20.
Qe
22.
23.
24.

DOMINICAN FossiLsS—Maury 251

Womeasxacequallichy Gale serene sosencinen actaecisecinins see cer seiaersise eae ae 229
Siligquarsubcequa lisa Gab pines yh ns ce aunasy cme wc wage mat dsetasen 230
Conbiwla@Aloidis))vieta- Guppy, Lome so aaa ayers nene. ceeneaas 231
Corbula (Cuneocorbula) dominicensis Gabb, lon. 13.5 mun..... 232
Corbula (Cuneocorbula) dominicensis Gabb.................c.eeee ee 232
Corbula (Cuneocorbula) cercadica, n. sp., lon. 6.5 mim.......... 232
Coxbulay(Cuneocorbula) icercadit canbe spose ee eae eeeeee eee eee 232
Corbula (Cuneocorbula) caimitica, n. sp., lon. 7 mm............ 223
Corbnila\(Cunecocorbulla)) Mcaimuiticanspyssce-sceescerseneee os ees 233
Corbula (Bothrocorbula) viminea Guppy, lon. 16 mm............ 233
Corbula (Bothrocorbula) viminea Guppy..............0.:sseseeeeeee es 233
Maxtesia Sanchi-Dominien: ma sp., lone al wits. senses. hee 234
Martesiarsanctisbartlivsas: Spy Ome.) fit ses easeasaeeeneatae nae 234

heredo incrassa tate rally by sash see leet eS Tee ante unr 235

ee
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Errata for Bulletin 29

PAGE LINE

5 15 For ‘‘alo”’ read ‘‘mala gente.”
8 4 For ‘‘mucho malo’ read ‘‘mucha mala.’
57 18 Genus Clava accidentally misplaced.
83 36 For ‘‘proevoideus”’ read “preovoideus.”’
98 init For ‘‘Veustrasenore”’ read ‘‘ Nuestrasenore.”’
Hiy) 28 sore in, Gp," meAGl “ins wares”
123 rei Insert ‘‘Localities.—Bluff 3, Cercado; Zone D, Rio
Gurabo.”’
129 24 Insert ‘‘ 7urritella planigyrata Guppy.’’
132 I ANGK| Sa, Gyo.”
133 16 iNolel “St, C, yea,”
128 26 Insert ‘‘Plate 33, Figure 4.”
144 33 For “‘semtcanaliculatas”’ read ‘‘semicanaliculata.”’
146 26 ANGIGl SS, SiO.”
167 1I For ‘‘analogue’’ read ‘‘analogy.”
173 tks) ior “Zoya AN”? ieee ““ovae Jet,”
200 22 For ‘‘riocamica’’ read ‘‘viocanica.”
211 12 For ‘“‘ Zrigonicardia”’ read “ Trigontocardia.””
Bi 7) 2 Insert ‘‘Plate 37, Figure 3.”
221 21 For ‘‘7slahtsapantiol@’’ read ‘‘tslahispaniole.”’

Volume plate numbering might well be added to Bulletin plate number-
ing under Explanation of Plates, pp. 236-251.

BOE E TINS

AMERICAN

PALEONTOLOGY

V oL. 5

NUM Bek S©

Santo Domingo Type Sections and Fossils
By

CARLOTTA JOAQguINA MAURY

ace i 2

1917

Harris Company
Cornell University, Ithaca, N. Y.
Wa Sscae

SANTO DOMINGO TYPE SECTIONS AND FOSSILS
PARA eae oie Ag il (G REA EsAPY,
By C. J. MAurY

SUMMARY OF CONTENTS

ABD 1h
PAGE
PRELIMINARY NOTE....... RGAAIEL acd UieRe der shalt pions anes 419
Characteristics of the fossil faunas..... Gatnbsute spe peodapeeeesc 419

Resemblance to the recent, 420; Deep sea affini-
ties, 420 ; The Pacific and Oriental elements in the
faunas, 421; Evidence of the Arcas, 422 ; Species in
common with Bowden, 422 ; Species in common
with Trinidad, 423; with Cumana, 423; with
Gatun, 424; with Florida, 425.

(GOOLOGY. Om Wess IRinvisie IMGN@scccsosusddosecooos uoddeenencc ae,

Section at Cercado, 425; Fossils at Bluff 1, 426 ;
Affinities of Bluff 1 fauna, 426; Fauna of Bluff 2,
427 ; Affinities of Bluff 2, 428; Fauna of Bluff 3,
428 ; Affinities of Bluff 3, 429 ; Evidence of Fora-
minifera, 430; Crustacea of Bluff 3, 431; Evi-
dence of the Bryozoa, 432; relations of the Cer-
cado Bluffs fauna to the recent Antillean fauna,
432: Relation of the Cercado Bluffs fauna to the
Bowden fauna, 433; Bowden fauna apparently
not a unit, 433.

(SHaOIeOVENY Oia Ueda IG) (GAOARAGHO) soccodcsapetovesosbosueauous codes

Section at Los Quemados, 434 ; Fauna of Zone A,
434; Affinities of the Zone A fauna, 435 ; Flora of
Zone B, 435; Affinities of the Zone B fauna, 436 ;
Fauna of Zone C, 436; Evidence of the Echino-
derms, 436; Fauna of Zone D, 437; Affinities of
the Zone D fauna, 438; Fauna of Zone EH, 438 ;
Affinities of the Zone E fauna, 439; Fauna of
Zone F, 439; Affinities of the Zone F fauna, 439 ;
Description and fauna of Zone G, 439; Affinities
of the Zone G fauna, 440.

GEOLOGY HORI Fy @ ay OAINTAe Nar tea te eee noe

Section at Cana, 441; Section at Caimito, 441 ;
Presence of Gypsum, 442 ; Fauna of Zone H, 442;
Affinities or Zone H fauna, 443; Fauna of Zone

I, 443 ; Affinities of Zone I fauna, 444.
GROCOGw Oi Wary JRO) WONCGWATAE concotecoocssccsss wees cooocscs

Section of Sabaneta Bluff, 445 ; Tentative correla-
tion of the Sabaneta beds, 445 ; Gabb’s Sabaneta
section, 445 ; Comparison of Gabb’s conclusions
with ours, 446; The gravels, 446; The yellow
shales of Guayubin, 446 ; The blue shales, 446.
TERTIARY AND QUATERNARY OSCILLATION OF LEVEL...

@rovecw OF El MORROy DES MON TEN CRISiIe see tnesseeeeeere

Heneken’s conclusions, 448; section at Morro,
448; The basal sandy clays, 449; Calcareous
clays, 450; Limestone cap, 450.

@CEROLTOGICUNOLES ON SCATTERED) OCA MIME Sassi. eecenes:

Section on the Samba Hills at about 540 feet alti-
tude, 450; Rio Amina, 451; Guayubin to Mao
road, 452; Bulla river, 452.

440

444

447
447

450

IIt Ill

DES CUSSIONIOR EES RAT GRIAINENY 2 50 (ouside) doeuecceeee ce A53
The geographical sequence, 453 ; Evidence of the
mollusca, 454 ; Evidence of the corals, 455 ; Form-
ation of the Yaqui valley, 456 ; Suggested analogies
with Porto Rico, 457; Correlation of the Yaqui
valley horizons with those of France and Florida.

CORE AITON AAC ASBIE EY ure seat mum ON ico eae Teta 460

JEN TIS SUN OW AWA CUBA DRM AES crate ne ely srs net ih Cela eee me ee conn ne 463

ILLUSTRATIONS.

PLATE 66. a. Rio Yaguajal near Sabaneta; b. Bluff 3, Rio

Mit opacities Concadomssncp attire crac ite vagce rn musta 426
67. a. El Morro de Monte Cristi, Northern End.
b. Bluff 3, Rio Mao at Hato Viejo...... MAE NRCG ate 434

68.-a. Zone Hi, Rio Cana’ at Caimito.
b. Zones A and B; Rio Gurabo at Los Quemados. 450

SINT Oe SDOMiNG@ “ivr e
Seen ONS AND bOSslies

PART If

SUR RAG RA |e

PRELIMINARY NOTE

Since the publication and distribution of Bulletin of Ameri-
can Paleontology, No. 29, Sections 1 and 2, comprising the sys-
tematic discussion of our Santo Domingo fossils, quite a number
of Gabb’s 1873 shells in the Philadelphia Academy’s collection
have been described, without figures, as new species by Drs.
Pilsbry and Johnson.* No doubt a number of these are not
represented in our collections and should be added to the Santo
Domingo fauna. Some species, however, described as new by
Drs. Pilsbry and Johnson will prove identical with mine and will
pass into synonymy, since mine have priority. For, Section
I (pages 1-120) of Bulletin 29 was published and distributed
March 31, 1917 and Section 2 (pages 121-240), April 29, 1917,
while Drs. Pilsbry and Johnson’s Advance Descriptions were not
issued until May 4, 1917, asstated on the cover of their separ-
ates.

CHARACTERISTICS OF THE Fossil FAUNAS

Our faunas, systematically discussed in Bulletin 29, forming
Part 1 of this memoir, show three striking features which are to
some degree deceptive:— (1) Many resemble the recent. (2) The
nearest living allies of certain species are deep sea forms. (3) The

*New Mollusca of the Santo Domingan Oligocene. Proc. Acad. Nat.
Sci. Phila., designed for the April number which was not issued in April.
Advance separates issued May 4, 1917.

Ana BULLETIN 30 420

modern representatives of others are Pacific, living on the
West Coast of the Americas, or more rarely are found in the
Indian Ocean. Sowerby* was struck by this on examining Hene-
ken’s collection in 1849.

Resemblance to the recent.—At first glance the fossils seem so
like the recent that one would not attribute to them their real
antiquity. But actual comparisons show that in the great major-
ity of cases the fossils are not absolutely the same but are ances-
tral, being the stock from which the recent has evolved. Yetin
a few instances they have lived on without apparent change agree-
ing perfectly with recent specimens collected by our party on the
Monte Cristi beach where several hundred recent species were
gathered.

More exact study of the Bowden and Santo Domingo faunas
has much reduced the proportion of the recent. Gabb?} gave for
his Santo Domingo collection 217 extinct species and 97 recent
forms, while of the 451 species discussed by the writer in Part 1
of this memoir only 34 are regarded as identical with the recent,
and some of these are considered doubtful.

Deep Sea Affinities.—Our faunas as a whole are made up of
molluscan genera inhabiting warm seas at moderate or shallow
depths, many being dwellers on coral reefs. And Dr. Cushman
who has most kindly studied our collections of Foraminifera in-
forms me that no characteristic deep sea genera are present al-
though certain ones may also be found at some depth. The gen-
eral character is against deep water conditions especially the
abundance of Orbitolites and Amphistegina which are typical of
shallow water. The same is indicated by our hermit crabs from
Bluff 3.

Nevertheless a few forms have their nearest allies in deep
water. For example Moétza (Sheldonella) maoica recalls certain
deep water Bathyarcas and Cucullarias. The probable descen-
dant of Cyrepitacella cepula is C. Gabbi found in nearly freezing

*Quart. Jour. Geol. Soc. London, vol. 6, 1850.
{Trans. Amer. Phil. Soc. vol. 15, p. tor, 1873.

421 DOMINICAN SECTIONS—MAURY 5

water at 78s fathoms. The genus Borsonia is now restricted to
the abyssal zone of the Antilles and Brazil. Protocardia islahts-
paniole is represented by the deep sea P. peramadcilis. The
nearest ally of Scousca levigata is S. barbudensis, dredged off
Barbuda.

These cases might tempt one to imagine deep sea conditions
for our faunas but for the weight of evidence of the shallow
water species. We must conclude that the ancestors of these
deep sea forms inhabited shallow water and that their descend-
ants have since resorted to deep sea life from stress of circum-
stances.

The Pacific and Oriental Elements in the Faunas.—The
majority of our molluscan species are the ancestors of species now
living in the Antilles. Many have continued on almost without
change since the deposition of the blue clays. The Atlantic ele-
ment is very strong. Yet certain genera and species are now
represented only in the recent faunas of the Pacific coast of the
Americas, the Oriental seas and the Indian Ocean. ‘This Pacific
and exotic element speaks in favor of the Oligocene age of our
fossil faunas, Since the western migrants presumably crossed
into the Pacific before the closing of the Isthmus at the end of
the Oligocene, and clearly the Antillean stock existed prior to
that elevation. There are, however, two weak points in this line
of reasoning:— (1) Our species may have lived on undisturbed
after the Oligocene and so represent a later period of time; (2)
Dr. Vaughan* has suggested a later interccean water way inthe
Upper Miocene or Pliocene, possibly located in the region of the
Isthmus of Tehuantepec.

Of exotic genera we may mention Surcula, now restricted to
the Indian Ocean, Meta found inthe Malay archipelago, :Metula
in the China seas and off the Cape. Illustration of Pacific species
living on the West Coast of the Americas and showing a close
kinship to our Dominican fossil shells are Conus pyriformis repre-
senting C. recognitus; Cancellaria urceolata allied to C. Rowell: ,

*See Reef Coral Fauna of Carrizo Creek, U.S. G. S. Prof. Paper 98,
P. 369, 1917.

6 BULLETIN 30 422

Phos veraguensts representing Phos Moorei,;, Malea ringens re-
sembling M7. camura, Neverita glauca, close to N. neretdis ;
Scapharca grandis almost identical with S. patricia, Tellina
(Scissuda) delicatula very like 7. cercadica ; Sanguinolaria (Psam-
motella) operculata resembling S. Smithwoodwardi; Muiultha
childrent living in the Gulf of California, related to 47. Smuth-
wootward:, The Oriental Bursa bufonia is allied to B. bufont-
opsis and Cyprea (Pustularia) nucleus, also Oriental, represents
C. Gabbiana in the fossil fauna. A singular example of the
Pacific element in our faunas is furnished by the two Ostreas, O.
hiéteasts and O. megodon both also at Bowden, and forms identical
or very closely related are found on Cerros Island off the Cali-
fornian coast. Finally the marked resemblance of Costellaria
Ai faverosa from the Philippines to C. Bullennewtont may be
noted.

The Evidence of the Avcas.—An argument favoring the very
considerable antiquity of the horizons studied is the undifferenti-
ated character of the dvcas. Not, however, earlier than Oligo-
cene because of the presence of somany Scapharcas of the short,
erect, highly specialized type. Many of the species show charac-
ters of more than one section and appear to have developed be-
fore the latter became defined and crystallized. They show
mixed sectional features. For example, S. Azspaniolana is a
Cunearca with the cardinal area of Scapharca still remaining.
The related species S. cov-cupidonts and S. riocanensis also have
the cardinal area of Scapfarca with other characters of Cuncarca,
while C. Wllardaustent is not so highly specialized as modern
members oe eroup. S. Arthurpennelli is an Argina external-

ly, but vacillates between the cardinal area of dzgzna and Scaph-

arca and the ee are iniermediate. In brief our fossil Avcas
apparently lived before oe @ modern sections were definitely
evolved.

Species tit common with Bowden. —QOf the four hundred and

ecies discussed in the systematic part of this report
d andtwelve are known to occur Ls Boy wden. That is
)

423 DOMINICAN SECTIONS—MAURY 7

also living on the neighboring Jamaican coast. Dr. Dall in 1903*
noted that nearly 20 per cent of the Bowden species were common
tothe Santo Domingo fauna. Our collections show that of Dall’s
definitely identified species at Bowden 4o per cent are common to
the fauna of Santo Domingo. The reciprocal percentage is 9.
Further study will doubtless add a still greater proportion in
common, for the faunas were very closely allied.

Species in common with Trintdad.—Identified by Dr. Guppy.

List of Species

M=Manzanilla beds, C—Caroni Series, F=San Fernando.
Acteocina ovum-lacerti Gpy., C. Cymia Henekeni Maury.
Conus gracilissimus Gpy., M. Turritella planigyrata Gpy., C.
Conus planiliratus Sby., C. Solarium quadriseriatum Sby., C.
Conus marginatus Sby., M. Natica canrena Linné.
Drillia venusta Sby. Amauropsis Guppyi Gabb, F.
Oliva cylindrica Sby., C. Petaloconchus domingensis Sby., C.
Mitra Henekeni Sby., C. Barbatia reticulata Gm.
Latirus infundibulum Gm., C. Scapharca patricia Sby., C.
Xancus validus Sby., C. Crassinella Guppyi Dall.
Murex domingensis Sby., C. Metis trinitaria Dall, C.

Corbula (Aloidis) vieta Gpy., M.

A striking form like Amauropsis Guppy allies the San Fer-
nando beds with our Zone G and Blut 2, while Petaloconchus do-
netngensis Shows a bond between the Caroni Series and our Bluff
rand Zone B faunas, Corbula viela allies the Manzanilla beds
with our Bluff 2 and Zone I.

Species tn common with Cumana, Venezuela.—The Cumana
beds have been studied by Guppy. They furnish the following
species in common with our Dominican beds :

List of Species

Terebra ineequalis Sby. Crepitacella cepula Sby.
Conus gracilissimus Gpy. Cerithium uniseriale Sby.
Turris albida Perry. Natica sulcata Born.

Clava plebeia Sby. Scapharca tolepia Dall.
Oliva cylindrica Sby. Scapharca cumanensis Dall.

*Trans. Wagner Inst. Sci., vol. 3. pt. 6, p. 1582, 1903.

& BULLETIN 30 424

Melongena consors Sby.
Phos elegans Gpy.
Murex domingensis Sby.

Glycimeris acuticostata Sby.
Pecten soror Gabb
Cardium: haitense Sby.

Species in common with Gatun.—The rich collections from
the Isthmus in the National Museum have only begun to be
studied by Dr. Cooke. When the work is finished a more
complete comparison can be made with the Dominican faunas
than is now possible. In the present state of our knowledge of
the Isthmian faunas it appears to me that comparatively few
species are actually identical butmany are analogous. These
analogies have in many cases been mentioned in the systematic
discussion of our faunas in Bulletin 29 and doubtless Dr.
Cooke’s work will bring many more to light. Among the
species common to the Isthmus and our faunas may be men-
tioned:

List of Species

Se ie

Terebra gatunensis Toula.
Terebra Wolfgangi Toula,
Conus haytensis Sby.

Conus molis B. and P.

Conus symmetricus domingensis Sby.
Conus consobrinus Sby.
Conus tortuosostriatus Toula.
Conus gaza J. and P.

Conus Dalli Toula.

Turris albida Perry.

Drillia consors Sby.

Oliva cylindrica Sby.
Marginella coniformis Sby.
Mitra longa Gabb.

Phos metuloides Dail.

Murex messorius Sby.

Sconsia lzevigata Sby.

Malea camura ? Gpy.
Petaloconchus domingensis Sby.
Natica canrena (Iinné) Morch.
Polinices subclausa Sby..
Sinum gatunense Toula,
Glycimeris acuticostata Sby.
Pecten scissuratus Dall.
Cardium dominicanum Dall.
Cardium serratum Linné.
Pitaria circinata Born.

Corbula viminea Gpy.

Of this list 9 occur in our Bluff 1, 8in Bluff 3; 6 in Bluff 2,
Cercado. This strongly suggests that more than one faunal zone

is represented at Gatun because of the faunal break between our
Bluff 1 fauna and that of Bluffs 2 and 3. It will be interesting
to see whether Dr. Cook does not find more than one zone at
Gatun.

425 DOMINICAN SECTIONS-—MAURY 3

Species in common with Florida.—Ccomparatively few of our
Dominican fossils occur in the Cligocene of Florida. Among
these the following may be cited:

List of Species
C=Chipola, T=Tampa silex beds, W=White Beach limestone.

Terebra bipartita Sby., C. Ostrea haitensis Sby., C. O. G.
Lyria pulchella Sby., T. Liphophaga antillarum d’Orbigny, T.
Morum domingense Sby., T. Liphophaga nigra d’Orbigny.
Orthaulax inornatus Gb., T. W. Phaccides domingensis Dall.

Arca umbonata Lamarck. Pitaria planivieta? Gpy., W.

Barbatia reticulata Gm., T. and C. Antigona tarquinia Dall, T.
Siliqua subeequalis ? Gabb, C.
Orthaulax links the Tampa beds to the Orthaulax zone.

GEOLOGY OF THE RivER Mao

Our explorations were made near Cercado de Mao of which a
general view is shown in the frontispiece, Bulletin 29, and the
location of the hamlet is indicated as number 13 on the Sketch
Map facing page to of that bulletin. Views cf Rio Mao are shown
Plates 1B and 2B of this bulletin; photographs were taken by
Mr. K. P. Schmidt. Cercado is one cf the oldest of the Santo Do-
mingo type localities where Colonel Heneken made his first col-
lection in 1849.*% Our section is a generalized one Die from
successive high bluffs met with on ascending the riv

Section at Cercado de Mao

Rect
Bluff No. 1. A mile abové Cercado. Composed of blue clays lo-
calty hard and brittle. No limestone. ossils abundant and
well preserved. Height of bluf approximiately...............2-... 200
Bluff No. 2. Four miles above Cercado. Elune clays with layers
formed of masses of Foraminifer ra which appear like fine
gravel. Fossil mollusca occur in lenses and are quite abund-
Ainben lero ieal DOU EN vacwacace en cwaceemacnceoe ce acies oar cpkiseceueansescies 200
Bluff No. 3. Five miles above Cercado. Bluff composed of blue
clays and sand with layers of marl. Tellinas abundant. Fu-
coids and Bryozcain the sandy layers. Fauna exceedingly
IsKClde ye MelErolale EhoyomondnonByPSl i744: cen ncscaseacupeunenoa se UsooOOORCBLuHaECEbo: 200

*See Quart. Jour. Geol. Sec. London, vol. 6, 1850; vol. 9, 1853; vol.
22, 1876.

10 BULLETIN 30, 426

Fauna of Bluff r.—The following species were collected at

Bluff 1, Cercado:

List of Species

Terebra haitensis Dall.
Conus haytensis Sby.

Conus Sewalli, n. sp.

Conus stenostomus Sby.
Conus granozonatoides, n. sp.
Conus gaza J. and P.

Conus Karlschmidti, n. sp.
Surcula riomaonis, n. sp.
Turris albida Perry.

Turris albida antillarum Crosse.

Drillia cercadonis, n. sp.
Drillia venusta Sby.

Drillia Henekeni Sby.
Drillia islalindz, n. sp., var.
Cythara cercadica, n. sp.
Cancellaria Barretti Gpy.
Cancellaria epistomifera Gpy.
Cancellaria Guppyi Gabb.
Oliva cylindrica Sby.
Marginella coniformis Sby.
Lyria pulchella Sby.

Mitra Henekeni Sby.

Mitra Berlineri, n. sp.

Fusus Henekeni Sby.
Fasciolaria semistriata Sby.

Fasciolaria carminaimaris, n. sp.

Xancus preeovoideus, n. sp.
Metulacancellata Gabb.
Phos Moorei Guppy, (var. )
Metulella venusta Sby.
Typhis cercadicus, n. sp.
Murex domingensis Sby.

Murex doiningensis near yaquensis.
Murex cornurectus Gpy.
Distortrix simillima Sby.
Cassis sulcifera Sby.

Sconsia leevigata Sby.
Morum domingense Sby.
Cypreea Henekeni Sby.
Cypreea Noueli, n. sp.
Cypreea spurea Linné.
Cypreea spurcoides Gabb.
Cypreea patrespatriz, n. sp.
Strombus haitensis Sby.
Strombus bifrons Sby.
Strombus proximus Sby.
Strombus maoensis, n. sp.
Crepitacella cepula Gpy.
Solarium quadriseriatum Sby.
Xenophora delecta Gpy.
Natica canrena Linné.
Natica Youngi n. sp.
Amauropsis Guppyi Gabb.
Scapharca golfoyaquesis, n. sp.
Scapharca cercadica, n. sp.
Glycimeris acuticostata Sby.
Pecten soror ? Gabb.

Pecten excentricus Gabb.
Spondylus bostrychites Gpy.
Echinochama antiquata Dall.
EB. antiguata yaquensis, n. var.
Cardium serratum Linné.
Antigona Blandiana Gpy.
Chione Henderseni Dall.

Affinities of the Bluff 1 Fauna.—Of this list of Bluff 1 spec-

ee a ee ee

ies 45 per cent occur at Bowden, 28 in Zone F, 25 in Zone B,
23 in). Zone A. 17 in iui 2, ve) in blot Nand) 12 my Aone ie.
But since the number of species in the beds is unlike,
the mutual or reciprocal percentage gives a truer relation.
For example 28 per cent of the Bluff 1 species occur in

Pl. 66, Vol. 5 BuLL. AMER. PAL. IN@s ZO, Wil, i

A, Rio Yaguajal near Sabaneta

B. Bluff 3, Rio Mao at Cercado

427 DOMINICAN SECTIONS—Maury II

Zone F and 70 per cent of the Zone F species occur in Bluff 1 and
the product of these two percentages gives 19.6. This we call
the reciprocal percentage which expresses the purely mathematt-
cal proportion. The reciprocal percentages of the Bluff 1 fauna
are as follows:— 19.6 to F, 14 to A, 10 to B, 4.5 to Bowden, 3 to
Bluff 3, 2 to G, 1.5 to Bluff 2. This reveals a remarkably strong
bond to F, also a ratherstrong alliance with A and B; buta
very marked faunal break between Bluff 1 and Bluffs 2 and3. G
is also set apart from Bluff 1.

Fauna of Bluff 2.—The following species were collected at
Bluff 2, Cercado :

List of Species

Acteocina triticum-tritonis, n. sp.
Volvula cylindrica Gabb.
Terebra spirifera Dall.

Conus furvoides Gabb.
Turris albida Perry.

Drillia maonisriparum, n. sp.
Mangilia Lalonis, n. sp.
Cythara gibba Gpy.

Cythara elongata Gabb.
Cancellaria Barretti Gpy.
Cancellaria islacolonis, n. sp.
Oliva brevispira Gabb.
Olivella muticoides Gabb.
Latirus fusiformis Gabb.
Phos Gabbi Dall.

Alectrion cercadensis, n. sp.
Murex cornurectus Gpy.
Cassis sulcifera Sby.

Malea camura Gpy.
Cerithium uniseriale Sby.
Turritella planigyrata Gpy.
Rissoina crassilabris Gabb.
Rissoina Sagraiana d’Orb.

Crucibulum cf. pileolum H. C. Lea.

Natica Youngi, n. sp.
Natica sulcata Born.
Polinices subclausa Sby.

Dentalium dissimile Gpy.
Dentalium dissimile

var. ponderosum Gabb.
Cadulus phenax P. and S.
Cadulus elegantissimus P. and S.
Leda peltella Dall.
Arca yaquensis n. sp.
Scapharca Henekeni, n. sp.
Seapharca cibaoica n. sp.
Scapharca cor-cupidonis, n. sp.
Scapharea Arthurpennelli, n. sp.
Glycimeris acuticostata Sby.
Pteria inornata Gabb.
Pecten excentricus Gabb.
Pecten cercadica, n. sp.
Anomia simplex d’Orb.
Crenella divaricata d’Orb.
Pandora inconspicua Gabb.
Crassinella Guppyi Dall.
Venericardia scabricostata Gpy.
Phacoides domingensis Dall.
Miltha Smithwoodwardi, n. sp.
Cardium dominicanum Dall.
Cardium haitense Sby.
Cardium haitense

var. cercadicum, n. var.
Cardium venustum Gabb.

12 BULLETIN 30 428

Amauropsis Guppyi Gabb.
Neritina viridemaris, n. sp.
Phasianella punctata Gabb.
Turbo dominicensis Laloi, n. var.

itaria planivieta Gpy.
Chione Woodwardi Gpy.
Chione cf. Walli Gpy.
Semele Claytoni, n. sp.

Corbula vieta Gpy.

Affinities of the Bluff 2 Fauna.—Of this list 64 per cent oc-

cur in Bluff 3, 40 at Bowden and 13 in Bluff 1.

The reciprocal

percentages are 15 to Bluff 3, 3 to Bowden, 1 to Bluff 1. That
is, Bluffs 2 and 3 are linked together closely and have a bond
with Bowden, but are sharply set off from Bluff r.

Literally millions of Amphistegina are present in Bluff 2.

Fauna of Bluff 3.—The following species were collected at

Bluff 3, Cercado :

List of Spectes

Cavolina near gibbosa R.

Acteon riomaensis, n. sp.
cteocina canaliculata Say.

Acteocina recta d’Orb.

Acteocina triticum-tritonis, 1. sp.

Volvula cylindrica Gabb.

Retusa yaquensis, n. sp.

Atys doliolum, n. sp.

Bullaria paupercula Sby.

Ringicula dominicana, n. sp.

Terebra spirifera Dall.

Terebra cirrus Dall.

Terebra oligomitra Dall.

T. gausapata lzevifasciola, n. var

Terebra Cambiarsoi, n. sp.

Terebra gatunensis Toula.

Conus molis B. and P.

Conus cercadensis, n. sp.

Conus recognitus Gpy.

Turris albida Perry.

Drillia Henekeni Sby.

Drillia macnisriparum, u. sp.

Mangilia maoica, n. sp.

Mangilia Lalonis, n. sp.

Niso grandis Gabb.

Pyratnidella canaliculata Gabb.
Pyrainidella semicanaliculata, n. sp.
Pyramidella diademata, n. sp.
Pyramidella Olssoni, n. sp.
Pyramidella cercadensis, n. sp.
Pyramidella Arionis, n. sp.
Turbonilla Ogilvieze, n. sp.
Turbonilla yaquensis, n. sp.
Turbonilla cercadensis, n. sp.
Turbonilla dominicensis Gabb
Turbonilla Karlschmidti, n. sp.
Turbonilla Olssoni, n. sp.
Turbonilla turritissima Gpy.
Turbonilla riomaoénsis, n. sp.
Turboniila turritelloides Gabb.
Turbonilla Nanniebelle, n. sp.
Odostomia Sancti-Dominici, n. sp.
Odostomia yaquica, n. sp.
Neritina viridemaris, n. sp.
Phasianella punctata Gabb.
Astralinm sublongispinum, n. sp.
Astralium Karlschmidti, n. sp.

Circulus striata Gabb.

eee

Se a ee

429

Cythara elongata Gabb
Cancellaria Barretti Gpy.
Cancellaria epistomifera Gpy.
Cancellaria islacolonis, n. sp.
Oliva brevispira Gabb.
Olivella indivisa Gpy.
Marginella maoénsis, n. sp.
Persicula cercadensis, n. sp.
Lyria pulchella Sby.

Fusus Henekeni Sby.

Fusus Henekeni haitensis Sby.
Xancus preeovoideus, n. sp.
Melongena consors Sby.
Phos Gabbi Dall.

Phos costatus Gabb.

Phos fasciolatus Dall.
Nassarina Olssoni, n. sp.
Alectrion cercadensis, n. sp.
Tritia golfoyaquensis, n. sp.
Meta islahispaniole, n. sp.
Meta perplexabilis, n. sp.
Strombina pseucohaitensis, n. sp.
Anachis exilis Gabb.

Astyris DeRooyi, n. sp.
Murex messcrius Sby.
Murex cornurectus Gpy.
Simpuluin antillarum,

var. cercadicum, n. var.

Bursa Amphitrites, n. sp.
Cassis sulcifera Sby.
Phatium moniliferum Gpy.

Phalium moniliferum reclusum Gpy.

Malea camura Gry.

Ovula Wise- Woods n. sp.
Trivia islahispaniole, n. sp.

VT. suffusa Sancti-Domniinici, n. var.

Erato Mangeriz domingensis, n. var.

Strombus bifrons Sby.
Strombus proxinius Sby.
Bittium asperoides Gabb.
Bittium canaliculatum Gabb.
Solarium quadriseriatum Sby.
Sclarium Stonemane, n. sp.

DOMINICAN SECTIONS—MAURY 13

Teinostoma sandomingetise, n. sp.
Discopsis Derbyi, n. sp.
Fissurida alternata Say.
Dentalium dissimile Gpy.
Dentalium haytense Gabb.
Cadulus phenax P. and S.
Cadulus elegantissimus P. and S.
Nuculatenuisculpta Gabb.

Leda peltella Dail.

Arca yaquensis, n. sp.

Barbatia reticulata Gm.

Noétia maoica, n. sp.

Scapharca Henekeni, n. sp.
Scapharca cibaoica, n. sp.
Scapharca cor-cupidonis, n. sp.
Scapharca Arthurpennelli, n. sp.
Pteria inornata Gabb.

Ostrea virginica Gm.

Pecten excentricus Gabb.

Pecten Thompsoni, n. sp.
Modiolus cercadicus, n. sp.
Modiolus maonis, n. sp.
Pandora Haas Gabb.
Se islahispaniole, n. sp.
Lucina fe ne st
eee ides eae n. sp.

ae coides cercadica, n. sp.
acoides yaquensis Gabb
ee prevaricata Gpy.
Diplodonta capuloides Gabb
Diplodonta puncturella Dall.
Montacuta cercadica, n. sp.
Montacuta maoica, n. sp.

. Montacuta hispaniole, n. sp.

Cardium dominicanum Dall.
Cardiuin tintinnabularum, n. sp.
Cardium haitense Sby.

Cardium venustum Gabb.

Pitaria cercadica, n. sp.

Pitaria planivieta Gpy.

Chione Woodwardi Gpy.

Chione cf. Walli Gpy.

Tellina islahispaniole, n. sp.

TA BULLETIN 30 430

Rissoina crassilabris (Sabb. Tellina miaoica, n. sp.

Rissoina Sagraiana d’Orb. Merisca crystallina Chem.
Crucibulum cf. pileolum H.C. Lea. Merisca Sancti-Dominici, n. sp.
Natica sulcata Born. Scissula cercadica, n. sp.
Polinices subclausa Sby. Scissula scitula Dall,

Sinum gatunense Toula. Strigilla pisiformis Linné.
Epitomium minutissimum Gabb. Psamimacoma yaquensis, n. sp.
Epitomium riparum, n. sp. Cymatoica hispaniole, n. sp.
Epitomium cercadicum, n. sp. Psammosolen Sancti-Dominici, n. sp.
Triforis Calypsonis, n. sp. Donax cequalis Gabb.

Aclis acuminatoides, n. sp. Sanguinolaria Smithwood-
Melanella cercadica, n. sp. wardi, nl. sp.
Melanella maoica, n. sp Siliqua subzequalis Gabb
Melanella jacululum, n. sp. Mactrella cf. alata Spengler.
Melanella Tethyos, un. sp. Corbula cercadica, n. sp.

Affinities of the Bluff 3 Fauna.—Of this list 24 per cent oc-
cur in Bluff 2, 23 at Bowden, 15 in Zone I, 13in Zone H, 9 in
the Bulla river bluff, 9 in Zone G, 6in Bluff 1 and4in Zone F.
The reciprocal percentages are 15 to Bluff 2, 7 to Bulla river, 6
to Zone I, 4 to Zone H, 3 to G, 2.9 to Bowden, 1 to Bluff 1, .92
to Zone F.

The strongest bond is with Bluff 2; 1 and F are sharply set
off ; the tie with G is weak.

Lividence of the Foramintfera.—Dr. Joseph A. Cushman has
very kindly identified the Foraminifera we collected. There are
in all 33 species, chiefly from the Rio Mao andCana. Dr. Cush-
man writes that “in general Zones H and I, Rio Cana and
Bluffs 2 and 3, Cercado de Mao seem to represent a single unit
as far as the Foraminifera show and I should put the age of these
Early Miocene or Upper Oligocene, preferably the former.’’

hus Bluffs 2 and 3 are linked together and allied to H and
I by the Foraminifera just as they are by the Mollusca.

Dr. Cushman tells me that during the deposition of Bluff 2
conditions were evidently very favorable for Amphistegina
which is so exceedingly abundant.

Apropos of the Santo Domingo Tertiary Foraminifera it may
here be mentioned that Gabb used ‘‘Oréztoides’’ as a very im-

A3I DOMINICAN SECTIONS—Maury 15

portant guide in correlation. For example he mentions finding
this genus in the rocks of the Monte Cristi range,* and again on
the peninsula of Samana.t

At Santa Barbara he remarks { ‘‘that the omnipresent Ovéz-
totdes fortunately appears in some places and thus saves us from
the uncertainty that might hang around the age of so exceptional
a group of rocks.’’

Now our party, in the area explored by us, made a special
hunt for Gabb’s ‘‘Orbztoides,’’ but found nothing that looked to
us like that genus and on asking Dr. Cushman, he writes posi-
tively there are no Orbditozdes in our collection ; that in this
country as elsewhere the genus is limited to the Cretaceous and
Lepidocyclina, known as Orbitoides also in most American
papers, seems to be limited to Lower Oligocene and Upper Eocene.
Neither genus is in our collection.

We hope some day to collect from the Monte Cristi range
and the Samana rocks in order to find Gabb’s ‘‘Orbdztotdes,’’
which was doubtless a genus resembling the true Ordztozdes, per-
haps Lepidecyclina. The object would be to determine whether
these formations are not an older series than the blue clays.
This seems extremely probable.

Crustacea of Bluff 37.—We found quite a number of frag-
mentary remains of various Crustacea, especially crabs’ and
Hermit crabs’ claws. These were submitted to Miss Rathbun
who very kindly identified them for me as follows:— Crangont-
de, ?Eryonide, Pagurus, (=Eupagurus), Calappa flammea
(Herbst), Cycloes bairdit, ? Orithyta, Persephona, Portunus near
spinicarpus Stimpson, Porltunus sp., Callinectes 2 species, Pano-
peus, Xanthide or possibly Goneplacide 3 species, MWesorhea new
species.

The Callianassa, Miss Rathbun notes, is very like and may
be identical with a species collected by Dr. Vaughan in the Oligo-

*Trans, Amer, Phil. Soc., vol. 15, p. 167, 1873.
fidem., p. 174.
UGH, {D, WF

16 BULLETIN 30 432

cene of Anguilla. This gives usan additional bond with that
island.

The family Zvyonide now is in deep water and not common.
This accords with the deep sea affinities of a number of our mol-
luscs from various Dominican localities. Miss Rathbun further
notes that Ovzthyia is now limited to the East Indies and is
scarce. Calappa flammea and Persephona are Atlantic forms,
while Cycloes bairdit and Portunus spinicarpus are both Atlantic
and Pacific in recent time. The same is true of W/esorhwa, a rare
genus with but two living species, one on the East, the other on
the West side of Tropical America. This genus has never before
been found asa fossil. These Pacific and East Indies affinities
shown by certain of the Crustacea harmonize with the Pacific
and East Indian relationships of a number of the mollusca.

Evidence of the Bryozoa.—Dr. Bassler and Dr. Canu, who
have been so kind as to identify the Bryozoa we collected, write
me that ‘‘the Bryozoa indicate a Bowden age of the rocks.
Bluffs 2 and 3, Cercado de Mao, have the best faunas and show
the relationship most clearly. Rio Cana, Zone li; Rio Amina,
Hato Viejo to Potrero; and Ric Gurabo, Zone G, contain few
but the same species.’’

The Molluscan evidence correlating Bluffs2 and 3 withI
and G is thusstrengthened by the Bryozoan fauna.

Relation of the Cercado Bluffs Faunas to the Recent Antillean
Fauna.—Of the sixty-four molluscan species we collected in Bluff
1 only three have lived on to the present time, namely, Cyprea
spurca, Natica canrena and Levicardium serratum. Three also oc-
car among the sixty-one species of Bluff 2,namely, Azssozza Sag-
vaitana, Natica sulcataand Anomia simplex. Of the 162 species
of Bluff 3, ten species have lived on nearly or quite unchanged :—
Acteocina canaliculata, A. recta, Murex messorius, Rissoina Sagra-
tana, Natica sulcata, Fissuridea aliernata, Lucina chrysostoma,
Diplodonta puncturella, Merisca crystallina, Sirigilla pisiformys.
But if the entire number of recent Antillean species were taken
into consideration and the reciprocal percentage calculated it

|
|
:
4

433 DOMINICAN SECTIONS-—MAURY 17

would be an exceedingly smallfraction. There is an overwhelm-
ing proportion of extinct species.

Relation of the Cercado Bluffs Faunas to the Bowden Fauna,.—
The Bluff 1 fauna has the strongest bond with Bowden, but that
of Bluffs 2 and 3 is also related to Bowden, the respective re-
ciprocal percentages being 4.5, 3, 2.9. But the Bluff 1 fauna is
very unlike the mutually related Bluffs 2 and 3 faunas.

The Bowden Fauna apparently not a unit.—\t would seem
that several faunal zones are represented in the Bowden since it
has affinities with our dissimilar faunas. That it is not a unit is
suggested also by the description of the Bowden bed. Dall* says :
‘‘The bed of marl which contains the rich fauna of Bowden occurs
in a calcareous gravel at the foot of Baker’s Hill, Morant Bay,
Jamaica, about three feet above the sea.’’ Such coarse material
as gravel suggests that the shells arenot in their original szzz,
which would have been farther off shore where finer material was
being deposited, and that they are an assemblage gathered by
currents and deposited in the calcareous gravels.

For the above reasons the Bowden fauna is here tentatively
subdivided into upper, middle and lower horizons. This theory
must be tested by actual study in the field.

GEOLOGY OF THE RIO GURABO

Our explorations on Rio Gurabo were made in the vicinity
of Los Quemados, which is also one of Heneken’s type localities.

The location of this hamlet is shown on the Sketch Map (12)
facing page 1oof Bulletin 29. A characteristic view of the river

bluffs are shown on Plate 3B of this bulletin. Actual superposi-
tion does not exist. The section is made up from successive
bluffs met with on ascending the river. The lettering is in de-
scending geological order.

The dip at Los Quemados is 16 feet in a hundred, N.55° HE.

*Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583, 1903.

18 BULLETIN 30 434

Section at Los Quemados

Feet

Concealed with vegetation and unexplored.
Timestone with poorly preserved corals. Apprceximate thick-

ness 50
Zone A. Hard, light blue clays forming vertical cliffs slightly con-

cave near the base. ‘The clays weather yellowish-white.

Fossils rare or absent in the upper parts of the bluffs, abun-

dant below. Fauna chiefly Gastropods. A few Pelecypods

as Venericardia and Echinochama. Approximately............ 300
Zone B. Hard blue clays, blocky, not well stratified, weathering

grayish. Fossils abundant. Thickness about..................... 50
Zone C. Alternating clays and limestones, with a rather heavy

bed of the latter above. Fossils very scarce, Casszs sulcifera.

Mhickuessapproximiateliy. jcee ven csnceee encerne cm aseses cee stese reste acer 10
Zone D. Hard, blue calcareous clays. Corals. Cerithium abun-

dante CA Omi sre wsceak cco eat elciane secucetat aeun eee cates Beanies 15
Zone E. Blue, uniform clays with Cerithium, Phos, Cyprea.

Approximate bys icasiccuety Geb ancnee ace ace mmc ecetitecene cee ircncmaatacncc eee 20
Zone F. Hard, greenish clays with concretions. Corals, Cassts,

NCHOPHOLE SAP PEOSAMIAE yee ened tiseeece ny aadeeee en sects epee eee 20
Zone G. ‘Two miles above Los Quemados. Hard, grayish-green

clays with sandy layers and limonitic nodules. Strata in

general unfossiliferous but lenses very rich in fossils occur.

Amauropsts. Few speciesin common with the preceding

zones. Exposed thickness Io feet, estimated total thickness

Elica Yes) Une SC BRe Race aud soc eanbE cana Sep pac pa nalcoadaeuensdcdcuaaddelemucoades 50
Unexplored.

Fauna of Zone A.—Zones A and B were examined success-
ively and their faunas kept distinct, but they apparently form a
stratigraphic unit and might better be grouped as A and B.

We obtained the following species from Zone A:

List of Species
Terebra Petiti, n. sp. Latirus infundibulum Gm.
Conus catenatus Sby. Vasum haitense Sby.
Conus granozonatoides, n. sp. Distortrix simillima Sby.
Turris albida Perry. Sconsia leevigata Sby.
Turris albida tellea Dall. Strombus haitensis Sby.
Turris albida antillarum C. Strombus bifrons Sby.
Drillia consors Sby. Solarium quadriseriatum Sby.
Cancellaria epistomifera Gpy. Natica Youngi, n., sp.

Lyria pulchella Sby. Scapharcea riogurabonica, n. sp.

Pl. 67, Vol. 5 BULL. AMER. PAL. IN@s 20; Jl, 2

A, El Morro de Monte Cristi, Northern End

B. Bluff, Rio Mao at Hato Viejo

435

Mitra Henekeni Sby.
Fusus Henekeni Sby.
Fusus Henekeni haitensis Sby.

Dominican SECTIONS—Maury se)

Venericardia islahispaniolee, n. sp.
Echinochama antiquata yaquensis,
n. var.

Antigona Blandiana Gpy.

Affinities of the Zone A Fauna.—Of this list 62 per cent oc-

cur in Bluff 1, 58 in Zone B, 41 in Bowden, 29 in Bluff 3,
The reciprocal percentages are 1g to Zone B, 14 to

lets ar anal ale

12 in

Bluff 1, to Bluff 3, 1 to Bowden, .7 to Zone G, .5 to Zone I, .4

to Zone H.

It should be noted also that the few species A has

in common with H and I, are those with considerable vertical

range.

Flora of Zone B.—The top of Zone B contains wood and

leaves of the Myrtle, Laurel and Mimosa families.

Professor E.

W. Berry was so kind as to identify them generically for me but
their state of preservation was not good enough for determining

the species.
and /nga.
surely new species.

The genera represented are Eugenia, Nectrandra
The various woods Dr. Berry remarks are almost
The range of the genera is such that no

special stratigraphic meaning is implied by their presence.

Fauna of Zone B.—The following molluscs were found :

List of Species

Conus haytensis gurabensis, n. sp.
Conus stenostomus Sby.

Turris albida Perry.

Turris albida antillarum Crosse.
Drillia fusiformis Gabb.

Drillia yenusta Sby.

Driliia squamosa Gabb.

Clava plebeia Sby.

Marginella Christineladde, n. sp.
Lyria pulchella Sby.

Mitra Henekeni Sby.

Fusus Henekeni Sby.

Fusus Henekeni haitensis Sby.
Latirus infundibulum Gm.
Latirus exilis Gabb.

Vasunmi haitense Sby.

Simpulum pileare Lamarck.

Distortix simillima Sby.

Bursa bufoniopsis, n. sp.

Cassis sulcifera Sby.

Sconsia leevigata Sby.

Crepitacella cepula Gpy.

Crepitacella cepula spiralistriata,
n. var.

Cerithium uniseriale Sby.

Serpulorbis granifera Say.

Solarium quadriseriatum Sby.

Natica Youngi, n. sp.

Turbo crenulatoides, n. sp.

Scapharca Henekeni, n. sp.

Scapharca golfoyaquensis, n. sp.

Scapharca riogurabonica, n. sp.

20 ‘BULLETIN 30 ; 436

Glycimeris acuticostata Sby. Echinochama antiquata yaquensis,
Pecten eugrammatus Dall. : n. var.
Spondylus bostrychites Gpy. Cardium Cinderellze, n. sp.
Venericardia islahipaniole, n. sp. Protocardia islahispaniole, n. sp.

Antigona Blandiana Gpy.

Affinties of the Zone B. Fauna.—Of the above 41 per cent
occur in Bluff 1, 33 at Bowden, ro in J, roin H. The reciprocal
percentages are 19 to A, 10 to I, 1.6 to Bowden, .7 to G, .6 tol,
LB (Ho) Jel.

Fauna of Zone C.—Fossils were scarce in the glauconitic-
like, bluish-green clays alternating with limestone which consti-
tuted this zone. Casts of Pecten and Conus were found but the
only identifiable molluscan species was Casszs sulcifera, which
ranges throughout our sections. Zone C is chiefly of interest as
being the probable horizon of two sea urchins which were found
loose. It is much to be regretted they were not zz szfz, since they
suggest a Helvetian horizon.

Lividence of the Echinoderms.—Dr. Jackson has been so kind
as to examine the Zone C sea urchins. They are the young and
adult of the same species. He says of this Clyfeaster in a letter
dated April 27: ‘‘The Clypeaster caudatus, I should think from its
comparion with other species was Miocene and I don’t think
there are any specimens in the other West Indian material that
can be referred to the species. When JI go down I will look
closely and see if I can give you further clues to other West In-
dian forms.’’

In a later letter Dr. Jackson remarks : ‘‘I have been to Bos-
ton and went over the material carefully. The only specimens
of Clypeaster caudatus, sp. nov. are those in Miss Maury’s collec-
tion from Santo Domingo. The species makes perhaps closest
approach to Clypeaster lanceolatus Cotteau which he described
from Cuba and which J included (with photographs) from the
Panama Canal Zone.’’

I may add regarding Echinoderms that Senor Rodolfo Cam-
biarso of Santo Domingo City most kindly presented me witha

437 DomINnrcan SECTIONS—-MAURY 21

splendid specimen from Gato on the southern side of the Island.
Dr. Jackson identified this as Clypeaster Dalli (Twitchell). It
was published as Diplothecanthus Dalli Twitchell in W. B. Clark
and M. W. Twitchell, 1915, Mesozoic and Cenozoic Echinoderm-
aU) OHMS WIS. p jos Bis, Ile Gop wsslass Ce ilor ACA ineromipnfersen sie)]0\.
Dr. Jackson writes: ‘‘Diplothecanthus is one of Duncan’s genera
and H. L. Clark says it isnot separable from’ C/ypeaster in his
opinion.

“Dipiothecanthus Dalli (Twitchell) was originally described
from the Caloosahatchie Pliocene.”’

Fauna of Zone D.—We found the following molluscs in this

ZOME =

List of Species

Terebra inzequalis Sby.

Conus proteus Hwass.

Conus Olssoni, n. sp.

Conus recognitus Gpy.

Conus marginatus Sby.

Surcula labiata Gabb.

Drillia venusta Sby.

Drillia Josquemadica, n. sp.
Drillia Donalbertonis, n. sp.
Drillia hispaniole, n. sp.

Clava plebeia Sby.
Clathurella Vendryesiana Dall.
Trigonostoma gurabis, n. sp.
Olivella Sancti-Dominici, n. sp.
Marginella coniformis Sby.
Lyria pulchella Sby.

Mitra quemadica, n. sp.
Strigatella ? perturbatrix, n. sp.
Costellaria Bullennewtoni, n. sp.
Fusus Henekeni haitens:s Sby.
Latirus fusiformis Gabb.
Vasum dominicense gurabicum,

nN. var,

Phos elegans Gpy.

Phos Guppyi Gabb.

Alectrion gurabensis, n. sp.
Alectrion losquemadica, n. sp.

Murex messorius Sby.
Murex cornurectus Gpy.
Murex preepauxillus, n. sp.
Aspella scalarioides Blainville.
Coralliophila miocenica Gpy.
Gutturnium gracile gurabonicum,
: , n. var.
Distortrix simillima Sby.
Bursa bufoniopsis, n. sp.
Cassis sulcifera Sby.
Sconsia leevigata Sby.
Morum domingense Sby.
Cypreea spurcoides Gabb.
Cypreea dominicensis ? Gabb.
Cypreea Gabbiana Gpy.
Cerithium microlineatum Gabb.
Cerithium Russelli, n. sp.
Cerithium uniseriale Sby.
Cerithium gurabense, n. sp.
Cerithium dominicense Gabb.
Siliquaria gurabensis, n. sp.
Turritella tornata Gpy.
Turritella submortoni, n. sp.
Polinices subclausa Sby.
Triforis Calypsonis, n. sp.
Arca occidentalis Philippi
Barbatia cf. Bonaezyi Gabb.

22 BULLETIN 30

Strombina Bassi, n. sp.
Nitidella cibaoica, n. sp.

Ostrea haitensis Sby.
Ostrea virginica Gm.

438

Spondylus gumanomocon B. and P.

Affinities of the Zone D Fauna.—Of this list 28 per cent oc-
cur in Zone BE, 24 in Bowden, 15 in Bluff 1, 14 in Bluff 3, toin
H, 8inF, 7 in I. The reciprocal percentages are: 10 to E, 2
touBlati1) 1 to FY ato Bowden) ss to) dite 7acomblat, caeeatopl.
The strong bondis with E. The genus Cer7th7um is so abundant
that we called D the Cerzthtum zone in the field. Both D and E
contain the striking species Costellaria Bullennewtont which we
found nowhere else.

Fauna of Zone &.—The following molluscs were collected :

List of Species

Terebra inzequalis Sby.
Conus haytensis Sby.

Conus symmetricus Sby. |
Conus Sewalli, n. sp.

Conus consobrinus Sby.
Conus tortuosostriatus Toula.
Conus Karlschmidti, n. sp.
Surcula labiata Gabb.

Turris albida Perry.

Drillia venusta Sby.

Clava plebeia Sby.
Cancellaria (Narona) losque-

madica, n. sp.

Marginella coniformis Sby.
Lyria pulchella Sby.

Mitra Henekeni Sby.

Mitra tortuosa Gabb.

Costellaria Bullennewtoni, n. sp.
Latirus infundibulum Gm.
Vasum haitense Sby.

Phos Moorei Gpy.

Phos elegans Gpy.

Strombina Bassi, n. sp.

Distortrix simillima Sby.
Cassis sulcifera Sby.
Sconsia leevigata Sby.
Morum domingense Sby.
Cypreea Henekeni Sby.
Strombus haitensis Sby.
Strombus bifrons Sby.
Strombus proximus Sby.
Cerithium microlineatum Gabb.
Petaloconchus Laddfrankline,
nl. sp.
Turritella tornata Gpy.
Turritella submortoni, n. sp.
Xenophora conchyliophora Born.
Natica Youngi, n. sp.
Natica (Stigmaulax) sulcata Born.
Polinices subclausa Sby.
Sinum Nolani, n. sp.
Epitomium textuvestitum, n. sp.
Dentalium glaucoterrarum, n. sp.
Scapharca losquemadica, n. sp.
Venericardia islahispaniole, n. sp.
Cardium (Leevicardium) serratum
Linné.

439 DOMINICAN SECTIONS—MAURY De

Affinities of the Zone FE Fauna.—Of this list 36 per cent oc-
eurin D, 431in Bluff 1, 27 in Zone F. The reciprocal percent-
Agesiatent 2 tonb ern tone lmicenunon tol. 9 ahat) 1s.) 1ssclosely:
allied to the preceding and following faunas of D and F as one
would expect, but shows also a strong bond with Bluff 1, not
surprising when one considers how very strongly F and Bluff 1
are related:

Fauna of Zone F.—We obtained the “following from this
zone :

List of Species

Turris albida Perry. Strombus bifrons Sby.

Clava plebeia Sby. Sepulorbis papulosa Gpy.

Lyria pulchella Sby. Xenophotra conchyliophora Born.
Mitra Henekeni Sby. Xenophora delecta Gpy.

Phos Moorei Goy. Turgurium imperforata Gabb.
Murex domingensis near yaquensis Natica Youngi, n. sp.

Murex cornurectus Gpy. Seapharca golfoyaquensis, n. sp.
Lotorium preefemorale, n. sp. Glycimeris acuticostata Sby.
Cassis sulcifera Sby. Pecten eugrammatus Dall.
Sconsia leevigata Sby. Amusium papyraceum Gabb.
Morum domingense Sby Spondylus bostrychites Gpy.

Malea camura Gpy. Cardium (lLeevicardium ) serratum
Strombus haitensis Sby. Linné.
Antigona Blandiana Gpy.

Affinities of the Zone F Fauna.—Of the above, 70 per cent
occur in Bluff 1, 46 in Zone E, 18 in Bluff 3, 20in F, 8 in D. The
reciprocal percentages are 19 to Bluff 1, 12 to Zone E, 2 toF,
TAO tOnD atone

Description and Fauna of Zone G.—This horizon was found
at the ford of the Cercado to Sabaneta road at the Gurabo river
about two miles above Los Quemados. The exposures are low,
rarely over ten feet. No line of contact could be found between
G and F nor any sign of unconformity but evenin the field the
fauna of G appeared markedly different from the faunas. of the
preceding zones. ‘The fossiliferous lenses occur in the upper beds

24 BULLETIN 30

the lowest being barren.

The angle of dip diminishes very considerably between this
It is here such a slight northerly dip

point and Los Quemados.

as not be apparent except when viewed from some distance.

List of Species

Bullaria paupercula Sby.

Terebra cirrus Dall.

Conus consobrinus Sby. »

Conus granozonatoides, n. sp.

Conus tortuosostriatus Toula.

Conus marginatus Sby.

Conus Bonaczyi Gabb.

Drilhia islalindee, n. sp.

Clava plebeia Sby.

Aphera islacolonis, 1. sp.

Oliva cylindrica Sby.

Oliva brevispira Gabb.

Olivella muticoides Gabb.

Marginella bispaniolana, n. sp-

Fasciolaria semistriata Sby.

Metulella venusta Sby.

Strombina pseudohaitensis
gurabensis, n. var.

Phalium moniliferum Gpy.

Malea camura Gpy.

Cypreea Henekenti Sby-

Strombus haitensis Sby-~

Strombina Nuestrasenoree, n- sp.

Natica Youngi, n. sp.

Natica sulcata Born.
Amauropsis Guppyi Gabb.

Amauropsis Guppyi gurabensis, n. var.

Sinum gatunense Toula. .

Turbo dominicensis Laloi, n. var.
Calliostoma Grabaui, n. sp.
Dentalium dissimile Gpy.

D. dissimile ponderosum Gabb.
Cadulus denticulus-tigris, n. sp.
Leda peltella Dall.

Scapharea golfoyaquensis, n. sp.
Scapharea inzequilateralis Gpy-
Giycimeris jamaicensis Dall.
Venericardia scabricostata Gpy.
Divaricella prevaricata Gpy.
Cardium haitense Sby.

Cardium serratum Linne.
Protocardia gurabica, n. sp.
Pitaria acuticostata Gabb.
Pitaria planivieta Gpy.

Chione Weodwardi Gpy.

Chione Hendersoni Dall.
Tellina Waylandvaughani, n. sp-
Scissula scitula Dall.

Affinities of the Zone G Fauna.—Of the above so per cent
occur at Bowden, 44 in Zone I, 32 in Bluff 3, 21 in Zone H, 10
in F,6in A, 4in B. The reciprocal percentages are: 14 to Zone
I, 4 to Bowden, 2.9 to Zone H, 1.9 to F,.7 to A, .2 to B. G’s
only strong bond is to Zone I.

GEOLOGY OF THE Rio CANA

Sections were obtained on the lower part of Rio Cana at
Cana and along the middle course of the river at Caimito. See

441 DOMINICAN SECTIONS-—MAURY 25

Sketch Map, Bulletin 29, facing page 10, Nos. 9 and 16. A view
of the river, taken by Mr. Schmidt, showing Zone H is given in
this Bulletin, Plate 3A.

Section at Cana

This exposure occurs just above the ford of the Mao to

Guayubin road at Cana.
: Feet

Bluff composed of hard, blocky, blue clay weathering yellow.
Cracks filled with gypsum. Fossilsinclude Serpulorbis papu-
losa and Placunanomia lithobleta. Thickness about............ 50
Both the species mentioned are at Bowden. Scapharca patri-
cia was found in the river debris but not zz stu.
Section at Catnetto.
This section is furnished by the successive bluffs extending
along the river from two miles below to two miles above Caimito.

2 HSS
Blufi two miles below Caimito. Argillaceous limestone with tubes
OH VMASQUO DUCTOSSOUGs WEN ORTCES o sotcana seoacecdces08, Sonconedeneeea 10-15
Heavy, sandy clays, Fucoids with Bryozoa, followed by gravels.
Jared nev ovo bh Cope peas ARM ME SOM Bm Rei, Mies in Sea Nae TS aU Ne ae 30
(Ui DIDIEIE SARAH AOR HONE ACUO! NOIR Wea secon dabcacusuapoEoseocoLeoasmesuernnaAsc I
Gl ay Meee eset tae anal faire Sawracrjcenye wines abecraMtetn miaeeleeha cea cae tinlabts et Bbc ae eine ree eisleae 4
WOIGIGUIE SAO AOE. (WOR FUGLC: | CEI bas ancodcos coseaotlen ones oqpecdecenars xoaananecace I-2
DVelllowesat diya Claby;Staseme aces cece cacececses ate ase atte ecco eee coco eennes 20-25
SLRS SYA MGI AOR CHE HEUO2 XE lees ote ceccicescecencodaio ecKoREceceeenneesecces I-2
Welllony HIMOSSUKDIETOUWIS “CER Sscoccacanceccds aousdnécesdoaddoosesedaodosseéadabe o 15
Chione LEVEE Ae ee mt tes AINE Pea aa a eeatae Seep Sein geen dia meister trees I
lighitayelownuntossiliterous Clay.c-e-.sces sos-¢-e5-5- 4-5 ison ar eee ecicaBeNe 15
Jip Keraine®. Jen SirrA cad soaenauatdatacad oseccHeasnte eonocadesarmeSe cua teccaodd aaa nanaeneaTe I
Lignite with Scapharca DP OUHUEUO mares ec caastae taco aeaeaeran a eansuce aces a 2
Gravel Sarcae eee rere ceeenleaee nie ace se eenoteeas cubeee se amesuaerecceestnen: Pe Ae 2
Concealed.

Zone H at the ford, Sabaneta to Cercadc road, Caimito.
Low exposures of blue and green clay, gravelly clays and pure
gravels. Fossilsin lenses. Amauropsis, Neverita nereidis,
SOMITE WMV OT UOUSHADD., BIO. scogoeobosdccvooceon bboebodoe poocbeone 50
Bluff farther up the river, composed of uniform hard clays with
lines of large concretions. (See Plate 3A). Unfossiliferous
except forafew Jelling. Approximately..........0....c00c00000 35
Gravels with compound corals at the top. Corals bored by /etr1-
cola, Botula, Lithophaga, Coralliophaga. About................- 15

26 BULLETIN 30 442
Zone I. Above Caimito. Orchid gorge. Hard greenish clays

with 7e/linas. River narrows. Approximate thickness...... 50
Two miles above Caimito. Sandy clays with fossils in lenses.

Irregular concretions. Aullaria Sarahberlinere found here.

Pbackaress val boptteess cess ossnesh ce na sel memes aN p en Nicene Nn ea cen 50
Sandy clays with lignitic streaks resembling those at Sabaneta.

ASO LOST ys age send aU sense Ne RL Ri cies cc cn MET er O 10O
Unexplored.

Presence of Gypsum.—From the Chione layer to the top of

the Fucoid and Bryozoan beds gypsum is found both as thin
plates filling nearly vertical cracks, and as clear, transparent sel-
enite crystals. The shellsof Scapharca patricia are also all en-
crusted with gypsum crystals.

The presence of gypsum indicates a period of aridity and

excessive evaporation.
Grand Gulf beds.

It recalls the gypsiferous strata of the

Fauna of Zone H.—We found a rich fauna with many bor-

ing molluscs in the corals.

List of Species

Acteocina canaliculata Say.
Acteocina (Cylichnella )

triticum-tritonis, 1. sp.

Retusa yaquensis, n. sp.
Bullaria paupercula Sby.
Terebra Berlinerze, n sp.
Conus haytensis Sby

Conus proteus Hwass.
Conus furvoides Gabb.
Conus Kitteredgei, n. sp.
Conus recognitus Gpy.
Cythara elongata Gabb.
Cancellaria Harrisi n. sp.
Oliva cylindrica Sby.

Oliva Cristobalcoloni, n. sp.
Oliva brevispira Gabb.
Olivella muticoides Gabb:
Mitra Henekeni Sby.

Fusus Henekeni Sby.

Fusus Henekeni Veatchi, m. var.

Arca occidentalis Philippi.

Arca umbonata Lamarck.

Barbatia submarylandica, n. sp.
Scapharca golfoyaquensis, n. sp.
Scapharca caimitica, n. sp.
Scapharca riocanensis, n. sp.
Scapharca Willardaustent, n. sp.
Pecten nodosus Linné.

Botula hispaniolee, n. sp.

- Lithophaga antillarum d’Orb.
“ Tithophaga nigra d’Orb.

Mytilopsis domingensis Recluz.
Coralliophaga coralliophaga Gui.
Chama caimitica, n. sp.

Chama congregatoides, n. sp.
Chama nocanica, n. sp.

Codakia orbicularis Linné.
Lucina chrysostoma Philippi.
Miltha riocanensis, n sp.
Phacoides yaquensis Gabb.

443

Phos fasciolatus Dall.
Strombina Nanniebelle, n. sp.
Murex cornurectus Gpy.
Cassis sulcifera Sby.

Phalium moniliferum Gpy.
Cypreea Henekeni Sby.
Strombus bifrons Sby.

Natica (Stigmaulax) sulecata Born. ig

Polinices subclausa Sby.
Neverita nereidis, n. sp.
Amauropsis Guppyi Gabb.
Turbonilla turritissima Gpy.
Turbo crenulatoides, n. sp.
Astralium Karlschmidti, n. sp.
Fissuridea Henekeni, n. sp.

DOMINICAN SECTIONS—Maury 27

Phacoides actinus Dall.
Cardium lingua-tigris, n. sp.
Cardium tintinnabularum, n. sp.
Pitaria circinata Born.

Autigona tarquinia Dall.

_ Petricola caimitica, n. sp.

Petricola riocanensis, n. sp.
Tellina riocanensis, n. sp.
Tellina cibaoica, n. sp.
Scissula scitula Dall.
Strigilla caimitica, n. sp.
Donax cequalis Gabb.
Siliqua subzequalis Gabb.
Corbula dominicensis Gabb.
Corbula caimitica, n. sp.

Affinities of the Zone H Fauna.—Of this list 32 per cent oc-
cur in Bluff 3; 32 in Zone I, 27 at Bowden, 14 in Zone G. The
reciprocal percentages are 11.5 to I, 4 to Bluff 3, 2.9 to Zone G,
2 to Bluff 1, 1.8 to Zone F, 1 to Bowden.

Fauna of Zone [—The following were obtained from this

horizon :

List of Species

Volvula cylindrica Gabb.
Bullaria paupercula Sby.
Bullaria Sarahberlineree, n. sp.
Bullaria granosa Sby.
Terebra spirifera Dall.
Terebra cirrus Dall.

Terebra Berlinersze, n. sp.
Conus furvoides Gabb.

Conus Kitteredgei, n. sp.
Conus recognitus Gpy.
Turris albida virgo Lamarck.
Drillia islalindee, n. sp.
Cythara caimitica, n. sp.

Glyphostyma golfoyaquensis, n. sp.

Cancellaria Harrisi, n. sp.
Aphera islacolonis, n. sp.
Oliva cylindrica Sby.

Strombus proximus Sby.
Solarium granulatum Lamarck.
Natica canrena Linné.

Natica Youngi, n. sp.

Natica sulcata Born.

Polinices subclausa Sby.
Neverita nereidis, n. sp.
Amauropsis Guppyi Gabb.

Niso grandis Gabb.

Turbo dominicensis Laloi, n. var.
Astralium Karlschmidti, n. sp.
Leda peltella Dall.

Arca yaquensis n. sp.
Scapharca inzequilateralis Gpy.
Scapharca cibaoica, n. sp.
Glycimeris jamaicensis Dall.
Pecten thetidis Sby.

28 BULLETIN 30 444

Oliva Cristobalcoloni, n. sp. Amusium papyraceum Gabb.

Oliva brevispira Gabb. Pecten caimitica, n. sp.

Mitra Henekeni Sby. Venericardia scabricostata Gpy.
Fusus Henekeni haitensis Sby. Divaricella prevaricata Gpy.
Melongena consors Sby. Diplodonta puncturella Dall.

Phos fasciolatus Dall. Cardium haitense Sby.

Strombina Nanniebelle, n. sp. Pitaria circinata Born.

Murex cornurectus Gpy. Pitaria planivieta Gpy.

Cassis sulcifera Sby. ‘Chione Woodwardi Gpy.

Phalium moniliferum Gpy. Chione (Lirophora) Hendersoni Dall.
Pyrula Pilsbryi Smith Tellina riocanensis n. sp. ;
Cypreea Henekeni Sby. Macoma cf. constricta Bruguiére.
Cypreea spurca Linné. Semele Claytoni, n. sp.

Trivia globosa Gray. Solen obliquus Spengler.

Corbula vieta Gpy.

Affinities of the Zone I Fauna.—The reciprocal percentages
are as follows: 14 to G, 11.5 to H, 6 to Bluff 3, .5 to Zone A, .4
to D. The strongest bond is with G, next in order come H and
Bluff 3. But there is next to nothing in common with A and D.

GEOLOGY OF THE RIO YAGUAJAL

A characteristic view of the Rio Yaguajal near Sabaneta is
shown on Plate 1A of this bulletin. A general description of
Sabaneta and its surroundings is givenin the narration of our ex-
pedition, Bulletin 29, page 4. The location is shown on the
Sketch Map facing page 1o of that bulletin.

The composition of the beds is well shown by several bluffs
along the Yaguajal. These exhibit considerable variation. At
one place the basal layer will be a heavy gravel, at another a
pure, hard blue clay. When traced even in a short distance the
pure clay may merge horizontally into gravel. In nearly all the
bluffs the blue clays alternate with gravel and locally lignite
seams are present, as in the Cana section. Elsewhere the clay
may contain large, rounded concretions also as along the Cana.
In the upper parts of the bluffs the clays have weathered to a
yellowish hue. No fossils were found in place.

445 DOMINICAN SECTIONS— MAURY 29

Section of Sabaneta Bluff

Feet
4. Superficial gravels.
3. Light yellow, soft material with thin beds of harder rock pro-
eebia crasis tallies Mel ves. reat een tear te-tctoasencnsee sor ces 25
2. Gravels composed largely of small, angular quartz fragments
mingled also with those of crystalline rocks. On making a
fresh cut the gravels were found to alternate with thin layers
of pure clay and ligniteseamis. At the base of the gravels

is a heavy blue clay mixed with much fine quartz. 50
1. Greenish-blue clay, quite hard, slopes convex. No fossils.
IBEX] OSSCL, . sash cacddo codaadodencedoo ncboddosce socsecosponab6 SHobedandcab bec qacdcHee 10

The only fossils found were two valves of Scapharca patricia
and one of S. auriculata but they were lying loose on top of 3.
Their origin is unknown.

Tentative correlation of the Sabaneta beds.—Judging from the
prevailing northern dip, calculated as noted at Los Quemados,
the general line of strike is N. E.and S. W. and the Sabaneta
section wouid lie approximately along the line of strike of the
Caimito and Los Quemados sections to the northeast. Thus
probably the alternating clays, gravels and lignitic seams of
Sabaneta are to be correlated with the gravels, clays and lignitic
sands of Zones H andI. Possibly the upper bed at Sabaneta
represents the Arca patricia horizon of the Cana but this is very
doubtful.

Gabb’s Sabaneta Section

In 1873 Gabb published* a section obtained near Sabaneta,
where the road crosses the Yaguajal, which he correlated with ex-
posures elsewhere and used in his ideal section of the Santo Do-
mingo ‘‘Miocene’”’ formation, page 95 /oc. cf. His conclusions
may be indicated briefly as follows:

Correlation Sabaneta Feet
Gravels of
the Mao. Gravels. 20
Yellow Yellow sandy clay shales. ee

*Trans. Amer. Philosophical Soc., vol. 15, p. 154.

30 BULLETIN 30 446

shales Lignite. 2% in.
of Yellow sandy clay shales. a
Guayubin. Lignite. 3% in.
Nivaje Blue shales. Depth
shale. unknown.

Comparisons of Gabb’s Conclusions with Ours

The Gravels.—Gabb recognizes but one set of gravels which
forms the top of his Sabaneta section and is correlated with the
Mao gravels.

Our section shows that in addition to these gravels there are
older gravels intermingled with the blue clays. In short there
are superficial, probably Quaternary, gravels and Tertiary gravels.
The surface gravels are described in the Sketch of our Expedition
(pages 3-4, Bulletin 29) as reddish and extending all the way from
Las Matas to Sabaneta, and they form the gravelly knolls on top
of the savannahs around Sabaneta. These gravels also occur in
the river terraces. The Tertiary gravels noted in our Sabaneta
section were also found in the Cana section Zones H and I and
lie near the base of the formations studied by us.

The Yellow Shales of Guayubin.—The differentiation into
yellow shales is not a good one because the blue. shales weather
yellow and their surface exposures are always yellow. To Gabb
all yellow shales are Guayubin shales but quite probably the
Guayubin shales are simply weathered equivalents of the blue
shale. However as Guayubin was rebel we could not study the
formations there satisfactorily.

As noted (Bulletin 29, page 7) in the region traversed by
our party the so-called blue and yellow shales were realiy hard
clays not consolidated nor laminated. Hence we have through-
out this memoir called them clays.

The Blue Shales.—These are also called the blue shales of
Santiago and the Nivaje shale. The latter name was given be-
cause of their typical development on the Nivaje arroyo which
enters the Rio Yaqui near Santiago. See Sketch Map facing page
to, Bulletin 29. Most unfortunately, the Revolution prevented

447 DOMINICAN SECTIONS—MAURY 20

our visiting the Nivaje and Upper Yaqui but we hope tc do so
later. Our collections and sections from the regions farther west
however sufiiciently indicate that all blue clays are not alike in
age. They are not a unit, but one set, represented by Zones
A-F and Bluff 1, occurs above the Tertiary gravel, and another
set, represented by lower H and G and Bluffs 2 and 3, occurs
with and below the Tertiary gravels. It remains to be proven
in the field whether the true ‘‘Nivaje shale’’ goes with the upper
or the lower set.

Tertiary and Quaternary Oscillations of Level -

The alternation of Tertiary gravel with clays as shown in
our Sabaneta and Cana sections indicates alternate elevations and
depressions of the shore line.

Terraces furnish another indication of changes of level. The
high level terraces seen from the bluff at Hato Viejo on the Mao,
plate 2B, have been described on page 8, Bulletin 29.

A striking indication of rather recent uplift is ‘the rejuvena-
tion of the Rio Cana described on page 9 of that bulletin.

Gabb* gives an interesting account of the raised sea caves in
the Post Pliocene coastal limestone, in one of which he made his
camp, and heremarks that they prove the recent, ‘‘and yet con-
tinuing,’’ uplifting of theland. I saw a great many sea caves
in process of formation on passing around the eastern and south-
eastern part of Santo Domingo and was informed that on the
small, uninhabited Island of Saona there are two level sea caves.

These indications of uplift accord with those recorded by
the raised coral reefs of Jamaica noted by Hill, and those of the
Brazilian coast studied by Branner. Similar changes have also
been noted in Porto Rico.

GEOLOGY oF Et, Morro DE MONTE CRISTI

The location of the Morro is shown on the Sketch Map, fac-

*Trans. Amer. Phil. Soc., voi. 15, p. 146, 1873.

32 BULLETIN 30 448

ing page to, Bulletin 29. It is separated from the main land by
a belt of salt marsh traversed by tidal rivulets. The highest
point of the Morrorises 825 feet above the sea. Columbus is
said to have named it Monte Cristi from the thorny bushes
crowning its summit. It was later called La Grange by the
French from a fanciful resemblance from certain viewpoints to a
huge barn.

Fleneken’s Conclusions.—Colonel Heneken* first studied this
interesting hillin 1853. He notes that on the northern face the
base is of red sandstone, dipping N. W. by N. 7°, overlain con-
formably by blue fossiliferous shale and this by tufaceous lime-
stone. On the western face he observed the intercalation of blue
and yellow shales and noted that the latter appear a larger de-
velopment of the Cercado shales. Hecorrelated the limestone
cap with the limestone capping the Samba Hills. Ina section
from the Morro to Guaraguano Heneken gives the following :

Tufaceous limestone.}

Shingle bed.

Argillo-calcareous shales.

Blue and green fossiliferous shales.

Tertiary
L

Red sandstone, unfossiliferous.
Micaceous schist.

Limestone.

Greenstone.

Oya AN,
OI AM & WN

Section of the Morro

During our stay at Monte Cristi the north side of the Morro
was unsafe because of lurking bandits andrebels. Mr. Schmidt,
however, obtained a photograph of the northern end shown on
Plate 2A. Our collections were made from the calcareous yellow
clays and the limestone of the southern side where the blue clays
are not present. The relation of the north and south sides could

*Quart. Jour. Geol. Soc. London, vol. 9, pp. 125, 126, 1853.

{The name ‘‘Tufaceous’”’ was later abandoned as analysis showed it to
be a misnomer,

449 DOMINICAN SECTIONS-—MAURY 33

not be worked out at the time for the reason mentioned. The
following is a generalized section of the southwest face.
Feet

825

Limestone cap
Yellow and soft
above, white below
A few corals.aud
casts of molluscs

675

Alternating

series of
clays,
limestones

and sands

gypsiferous

Fossils chiefly
about the
center

Allin the
form of casts

Alternation of
beds less marked
towards the base
Hard, bluish, ~

25 sandy clay.

Sea level

fig. 1 Section of El Morro

The Basal Sandy Clay.—This probably represents Heneken’s
“red sandstone.’’ Gabb* emphatically denied the existence of
Heneken’s red sandstone and restricted it to Heneken’s imagina-
tion. The only sandstone observed by our party was that out-
cropping in the town of Monte Cristi and upon which the fort is
built. The dip of this sandstone is very high. It is really gray
but often reddish or yellowish on the surface from oxidation. Ap-

*Trans. Amer. Phil. Soc., vol. 15, p. 95, 1873.

24 BULLETIN 30 450

parently Heneken erroneously inferred that the Monte Cristi sand-
stone was continuous with the Santiago sandstone (which we
have not seen) and that it underlay the entire Yaqui Valley.

Calcareous Clays.—These form about three-quarters of the
total thickness of the section and contain casts of a number of
moliuscs among which the following only could be determined :
Sconsia levigata Sowerby, Strombus bifrons Sowerby, Olivella
muticoides Gabb, Natica cf. Youngi Maury, Chtone Woodwardi
Guppy. Of these Sconsta levigata is found in Zones A, B, E, F
of Rio Gurabo, Bluff 1 at Cercado and at Bowden; Strombus
bifronsin Zones A, E, F, Bluffs 1 and 3 and Bowden; Olzvella
muticoidesin Zones G and H of the Gurabo and Cana rivers ;
Chione Woodwardi in Bluffs 2 and 3 and Zones Hand I. Hence
two of the formations of the Yaqui valley seem to be represent-
ed on the Morro.

The clays are gypsiferous, thin plates filling the cracks as in
the Scapharea patricia beds of the Cana river.

Limestone Cap.—This is about two hundred feet thick, white
below, yellowish from weathering above. Casts of Pecten, Glye-
meris and Conus were found but not specifically identifiable.
Corals were also present. Gabb followed Heneken in considering |
this limestone to be a continuation of that capping the Samba
Hills, the intervening part having been removed by denudation.
The probability of this is greatly enhanced by our collecting
specimens of a coral, kindly identified for me by Dr. Vaughan as
Syzygophyllia dentata (Duncan), from both the Morro limestone
and that of the Samba Hills. This species also occurs in Zones
C and D, Rio Gurabo.

GEOLOGICAL NOTES ON SCATTERED LOCALITIES

Section on the Samba Hills at about 540 feet altitude.—On the
old road leading to the mines described in the route of our Ex-
pedition, Bulletin 29, pages 5 and 6, between Las Caobas and
Rompino, the following section was obtained. The aneroid had
not been reset for some time and the readings are approximate

SOPVULANG) SOT qv OQVANS) O1Y ‘J Puy P Sau0y “_ OJLULID JV VUDD OLY “FF FUOZ ‘Pp

vd way “Tag S JOA ‘89 ‘Id

451 DOMINICAN SECTIONS—Maury 35

only. At 870 feet an unfossiliferous limestone bed was exposed,
at 660 feet a bed of sandstone, at 600 feet a second sandstone
bed outcropped, at 540 grayish and yellowish fossilferous clays
were found. The general surface of the Las Caobas plain is 480
feet. In the fossiliferous yellow clays in an arroyo were the fol-
lowing molluscs :—

List of Species

Calliostoma Grabaui, n. sp. Pecten eugrammatus Dall.
Arca lomasdesamba, n. sp. Pecten Thetidis Sby.
Barbatia cf. Bonaczyi Gabb. Pecten vaginulus Dall.
Scapharca Henekeni, n. sp. Amusium papyraceum Gabb.
Glycimeris acuticostata Sby. ' Myrteea lomasdesamba, n. sp.
Ostrea virginica Gm. Cardium sambaicum, n. sp.

Cardium serratum Linné.

Rio Amina.—Several bluffs composed of hard, light blue
clays were examined on the Rio Amina between Hato Viejo and
Potrero. See Sketch Map of Route (14) and (15). The bluffs
at Hato Viejo being farther down the river and hence higher in
the section, were found to be nearly barren, containing only a
few fossils too poorly preserved to collect. Further up the river
the bluffs become more fossiliferous but the fauna was still rela-
tively scanty.

The dip along this portion of the river is very variable,
changing from northerly to horizontal and southerly, thus prov-
ing the presence of an anticlinal fold. In the distance traversed
the lower beds were not encountered.

Miss Rathbun kindly has identified the chele which we col-
lected on the trail to Potrero as those of Petrochirus, a genus with
two living species, one West Indian, one on the west coast of
America. ‘Toula says he found Petrochirus in the Gatun beds.

List of Species

Acteocina ovum-lacerti Gpy. Phos Gabbii Dall.

Terebra Gabbi Dall. Phos elegans Gpy.

Terebra amitra Dall. Phos fasciolatus Dall.
Terebra haitensis Dall. Strombinella acuformis Dall.

Terebra cirrus Dall. Bursa Amphitrites, n. sp.

36 BULLETIN 30

Terebra oligomitra Dall.
Turris albida Perry.

Drillia venusta Sby.
Cancellaria Rowelli Dall.
Marginella amina Dall.
Marginella domingoensis Dall.
Lyria pulchella Sby.

Limopsis ovalis Gabb.
Limopsis hatoviejonis, n. sp.
Scapharca tolepia Dall.
Glycimeris acuticostata Sby.
Pecten eugrammatus Dall.
Pecten hatoviejonis n. sp.
Cardium aminense Dall.

Probably this horizon goes with Bluff 1 on Rio Mao and

with A to F on the Gurabo.

Our work on the Rio Amina was

really just begun and it calls for further exploration which floods

and rebels made impossible.

Guayubin to Mao rvoad.—From an outcrop on this road at
the ford of Rio Cana the foliowing were collected :

List of Spectes

Conus catenatus Sby.
Murex domingensis Sby.
Murex cornurectus Gpy.
Bursa crassa Dillwyn.
Strombus pugiloides Gpy.
Serpulorbis granifera Say
Serpulorbis papulosa Gpy.

Polinices Stanislas-Meunieri, n. sp.

Barbatia (Calloarca)
submarylandica, n .sp.

Scapharca Margarete, n. sp.
Scapharca guayubinica, n. sp.
Scapharca inzequilateralis Gpy.
Scapharca patricia Sby.

Ostrea megodon Hanley.
Ostrea virginica Gm.

Amusium papyraceum Gabb.
Placunanomia lithobleta Dall.
Chama involuta Gpy.

Antigona Blandiana Gpy.

This horizon is allied with the upper series and appears
quite high from the presence of Arca patricia. This we should ex-

pect from the outcrop being on the Lower Cana.

Our deeper

beds were found on the middle and upper portions of the river.

Bulla River.—Unidentified material was kindly loaned us
by the American Museum froma bluff on the Bulla River, a

small arroyo entering the River Mao.
roughly on our Sketch Map, facing page 10, Bulletin 29.
_ precise location is not known.

The location is indicated
The

List of Species

Volvula cylindrica Gabb.
Conus Kitteredgei, n. sp. var.

Nucula tenuisculpta Gabb.
Scapharea Arthurpennelli, n. sp.

453 DOMINICAN SECTIONS— MAuRY 37

Olivella cf. indivisa Gpy. Scapharea riocanensis?, n. sp. (young)
Marginella cercadensis, n. sp. Phacoides yaquensis Gabb.
Strombina cf. pseudohaiteusis, n. sp. Phacoides cercadica, n. sp.

Natica sulcata Born. Pitaria circinata Born.

Polinices subclausa Sby. Pitaria cf. acuticostata Gabb.
Melanella cf. cereadica, n. sp. Tellina scitula Dall.

Cadulus phenax P. and S. Siliqua subzequalis Gabb.

Corbula cercadica, n. sp.

Of the 19 species in this list 15 are present in Bluff 3. The
reciprocal percentage is 7. Undoubtedly this horizon goes with
Bluff 3 at Cercado on the Mao.

DISCUSSION OF THE STRATIGRAPHY

Moore raised the question whether the collections made by
Heneken in the Yaqui Valley might not represent more than one
formation, and in late years Dall has suggested the same query.
Heneken and Gabb, however, both thought that the fossils were
from one formation. Gabb* states very emphatically that the
whole valley is made up entirely and only of late Miocene strata
' and that no vertical differentiation of the horizons is possible.

To determine whether this was the case, or whether more
than one formation was present, and to find the stratigraphic
succession has been our main object.

While collecting from the bluffs of the Gurabo river on our
1916 Expedition, Mr. Olsson and Mr. Schmidt were struck by
the change of faunain Zone G from that of Zones A-F. A
similar change in the faunas was found between Bluffs 2 and 3
and Bluff 1 on the Rio Mao. They were convinced that two
formations were represented.

Subsequent critical study of all the various types of life we
collected from the bluffs of the Gurabo, Mao and Cana Rivers has
shown that their conclusion was justified.

The Geographical Sequence.—As the prevailing dip is a gen-

tle one to the north, on going southward in ascending the south-
ern tributaries of the Yaqui, as the Mao, Gurabo and Cana, one

“Trans. Amer. Phil. Soc., vol. 15, p. 101 and p. 158, 1873.

38 BULLETIN 30 454

would expect to meet with successively older outcrops, providing
his sequence had not been altered by folding or faulting. That
this may take place is shown by the low anticline found between
Hato Viejo and Potrero on Rio Amina. So while the geographi-
cal sequence is suggestive, we have placed little reliance upon it
in the determination of the stratigraphy. But as a matter of
fact it has practically coincided with the faunal evidence.

Evidence of the Mollusca.—In view of the large numbers of
species from the various localities and the rarity of what might
be taken as index fossils, the method of reciprocal percentages
has been used, as already explained, to determine relationships.
The results were very significant and may be briefly summarized.

Resumé of Reciprocal Percentages

fio Mao at Cercado

Bluff 1 Bluff 2 Bluff 3
19.6 to F.
Ui e——IN
10o—B. Ty &C) As. I to tf.
.92—F.,
Pek © Tae eee Oo) Sn mag
Case 15—3. 15—2.
2—G 7—Bulla R.
1.5—2. 6—I.
4—H.
3—G.

Rio Gurabo at Los Quemados.

Zone A Zone B : Zone D
19 to B. 19 to A. 10 to EB.
T4—I. TO==-1. 2—I.
SE ik, * ok TP OBS FP oe BP
I—3. .7—G. .8—H.
7—G offs
5—I .4---I

455 DOMINICAN SECTIONS—MAURY 29). ~

Zone E Zone F Zone G
T2ILOnE: 19 to I. 1.9—F.
“[2---F 12——E. .7---A.
Io—D. .2—B.
2 to G. 14---I.

SNOB 3—H

Bulla River Rio Cana

Zone H Zone I

2tOnie SSH akc

1.8---F. .4---D:

7 to 3. 11.5---I. 14 to G.
Aneaae 11.5---H.

3G: 6---3.

The faunal changes, represented by stars, are indicated by
a marked weakening of faunal bonds as evinced by the drop in
percentages. Zones G at Los Quemados, H and I at Caimito
and Bluffs 2 and 3 at Cercado form the lower formation and
Zones A-F at Los Quemados and Bluff 1 Cercado, the upper.
Strong bonds ally 1 and F, 1 and Aand B, D and E, G and I,
H and I, 2 and 3, 3 and I, 3 and Bulla River. But F and Gand
1 and 2 are sharply set apart.

Evidence of the Corals.—As stated in Bulletin 29, we are
much indebted to Dr. Vaughan for his kindness in writing a re-
port on our corals and in obtaining for us from his colleagues
summaries of the evidence furnished by our Foraminifera, Bryo-

zoa, Hchinoderms and Crustacea. The conclusions of Dr.
Vaughan and his colleagueshave been of great assistance and
support.

Dr. Vaughan, on examining our corals, discovered a faunal
break in this group in Zone H, Rio Cana at Caimito. This pre-
ceded the break in the molluscs, for those in H above the coral
bed are still closely allied to the faunaofI. One of our pro-
blems that remains to be cleared up is the exploration of the in-
terval between H and the Arca patricia beds. By inference with

40 BULLETIN 30 456

the conditions on the Gurabo and Mao the change in the mol-
lusecan fauna on the Cana would come right above H in the unex-
plored region. That the change in the corals preceded the mol-
luscan change at first seems contradictory, but as Professor Har-
ris suggests, corals are extremely sensitive and would respond to
the change of conditons from its very inception.

The few corals we obtained from the Gurabo and Mao river
bluffs do not show the break between F and G and G and 1 and
2 and 3. Apparently several of the species lived as did a num-
ber of the molluscs but there were only three or four corals in F
and G together and their evidence is outweighed by the hundreds
of species of molluscs and the Bryozoa and Foramanifera, all of
which agree in making a unit of Bluffs 2, 3, Zones G, H and I.
This unit is set off from the overlying Zones A-F and Bluff 1
unit.

Dr. Vaughan considers that H is probably Chipolan ; D and
Ff, Alum Bluff above the Chipolan ; Hand D, uppermost Alum
Bluff, z. e. uppermost Burdigalian ;. and A-C, perhaps Helvetian
Miocene. According to Dr. Vaughan the Chipola and Alum
Bluff horizons are Oligocene.

Formations of the Yaqui Valley.—The ‘Tertiary clays and
limestones of the Yaqui Valley seem to the writer to represent
three well defined formations separated by marked changes in the
molluscan faunas. These formations nay be designated as fol-
lows :

3. The Sconsia levigata Form-

2. ‘The Aphera islacolonis aa
1. The Orthaulax tnornatus

In addition to these the presence of an older formation car-
rying Gabb’s ‘‘Ordztoides’’ (perhaps Lepidocyclina) and constitut-
ing the Monte Cristi Range is suggested, but awaits investigation
in the field. Examination should be made of this range at var-
ious places, as on the trail near Alta Mira from .Puerto Plato to
Santiago to determine whether Lepidocyclina is present and the

457° DOMINICAN SECTIONS-—-MAURY 4I

relative age of the strata.

t. No one knows where Gabb found his Orthaulax inornatus
because none of his Dominican fossils were labeled more precisely
than, ‘‘Miocene, Santo Domingo.’”’ We presume, however, that
it was collected from the basal blue clays in the Eastern part of
the Yaqui Valley where the Revolution prevented our securing
sections and collections. For in the Western part of the valley
we have gone almost to the contact of the Tertiary with the older
series (See crystalline outcrop near Sabaneta, Plate 2B, Bulletin
29) and although a special search was made for Orthaulax we did
not findit. No doubt the Ovthaulax zone represents an older
horizon than from which we collected.

2. Todesignate the formation comprising our Bluffs 2, 3,
Zones G, H and I, I have chosen Cancellaria (Aphera) islacolonis
(See Bulletin 29, p. 65, pl. 10, fig. 12a, b) of which the descend-
ant, 4. tessellata, is now living in the Pacific. A. zslacolonis atter
occurring in the beds mentioned disappears abruptly. I have
never found it above the faunal break. Hence it seems a good
index fossil of the lower formation.

3. Very characteristic of the upper formation and extending
into what may possibly be the Helvetian strata of A-C, is Sconsia
levigata, of which the nearest living ally is the deep water S. bar-
budensts. S. levigata is present in A, B, D, E, F, Bluff 1 and the
Morro. I have never found it below F or Bluff 1. It seems the
best guide to the upper formation.

The possibility that the upper part of the Scovsza formation
grades into the Helvetian Miocene, as suggested by Dr. Vaughan
and Dr. Jackson, is very interesting, but judging from the evi-
dence given by the molluscs, is exceedingly doubtful since the
bonds between A and B and Bluff r and F are very close.

Suggested Analogies with Porto Rico.—Dr. Berkey in his Re-
connoissance of Porto Rico* found a great unconformity separat-
ing an Older Series of Cretaceous interbedded limestones, tuffs and
shales from a Younger Series of Tertiary shales, limestones and
sands, which range from the Lares shales to the Pleistocene dune

*Ann. New York Acad. Sci., vol. 26, p. 61, 1915.

42 BULLETIN 30 458

sands. The latter are followed by the comparatively recent flood
plain deposits. The fossils have not yet been identified so exact
comparisons are not possible yet certain analogies are suggested.
Thus near Bucaro, 27 miles west of Santo Domingo City at the
copper mines, beds of tuffs occur capped by limestone. These
seemingly correspond to certain of the Porto Rican tuffs. The
Lares shales may gowith the Orthaulax zone of the Yaqui Valley
or perhaps with the probably older Monte Cristi range. The lime-
stones and marls above the Lares shales perhaps correspond to
our Aphera and Sconsia formations. The terraces recall the Do-
minican terraces seen from Hato Viejo, while the flood plain de-
posits are probably synchronous with t he flood plain of the Rio
Yaqui.

Correlation of the Yaqui Valley Horizons with those of
france and Florida.—The resemblance of the fossil shells from
the blue clays of the Yaqui Valley to those of Bordeaux and Dax
was noted from the very first by Moore, Sowerby and Guppy. In
modern French nomenclature the fossiliferous marls of the Bor-
delais are placed in the Lower Neogene comprising a lower,
Aquitanian series typical at Léognan and Saucats and an upper,
Burdigalian series typical at St. Paul and Dax in the Adour
Valley. The Aquitanian was at one time regarded as Oligocene
but modern French stratigraphers place it in the Lower Miocene.

The Dominican Orthaulax Formation is older than those of
Bordeaux and represents approximately the Rupelian Oligocene
of Europe and the Tampa silex beds and White Beach limestone
of Florida. It comesin just above the Vicksburg limestone.

The Aphera Formation represents the Chipola marls of Flor-
ida and the Upper Aquitanian of the Bordelais. In modern
French nomenclature this is Lower Miocene.

The Sconsza Formation would representing the overlying
Burdigalian and the cross-bedded sands above the Chipola marls
of Alum Bluff, Florida, also the Oak Grove sands of Florida.
Recent French authors classify the Burdigalian as Middle Mio-
cene.

459 DOMINICAN SECTIONS—MAuURY 43

We then called the crossbedded sands and Oak Grove sands
Transitional, for which Burdigalian should now be substituted.

Whether, as suggested by the loose Clypeaster caudatus, the
Helvetian subdivision of the Vindobonian Miocene comes in at C
remains to be proved or disproved. The Helvetian is basal Up-
per Miocene of recent European usage but basal Miocene of certain
American authors. [If present it would show that a warm water
fauna was living in the Dominican waters before, or possibly
simultaneously with, the cold water Chesapeake (Tortonian?)
fauna extending along the American coast.

GENERAL CORRELATION TABLE.

A summary of the main conclusions reached may be most
clearly expressed by the following table.

te
y

eed)
AN | I)
va

Kine

“Los Quemados |

; The Morro - Sabaneta Cana, Caimito : =
Formations. a Monte Cristi. Rio Yaguajal. | Rio Cana. | Rio Gurabo. Corea de Mao.) Bulla River. | Jamaica. | Panama. i Florida. | — Europe. Stage.
| | eevee) <embed Scie = I~
| |
| | |
| | | | | |
| | |
* * OK | f . *) ck kK * | * OK * OK | OK * kk XK] * * OK K | * ho ek | Cae he ules ES ks * | * *k* k KIS. x * «ly
| | la i < ~ a | 7 * ne |) K * *K a
| | | + Serxpulorbis | | | . x :
| ie q i C | A | Bluff c. | ? Helvetian Up. Miocene.
peed at anal) | Fossiliferous, | | oe Fae seit le oe ee a 2
Limestone | ET Eset | e | Cat | Alum Bluff
j | tone at | | caleareous | atun
’ cap Upper | ier ter oe fom | |
Sconsia _ argillaceous | Upper bed | Caimito. | Ci | Re | | cteor ae crossbedded
levigata. | limestones (3) ofsection. Arca patricia) D | o: | | gravels of | ae | sands and Burdi- Middl
with Sconsia. | beds. | Bowd | Sconsia. SEES Gh as i aa
| Change to | E weer | Oak Grove.
| i} a . . ; | | 2
| ome. Os eG eons
* * *Kilok ook * *) Kk *k ee a ee ae es *K *i|K aK * | sk “Ok Saliesteine= ae sk : ko wk kis nae ste wklse x * *
| H | 7 i i i mS 7s * *K a mixed | = a ae 7 | *K * * *K * * *K * |
Gravels with Clave and | |
basal blue she | | 3 fauna
| clays, lignitic, g | Bluff No. 2. | |
Aphera Lower re None Coral change.) representing | Marls of the é
1 ction. “1, 3 Upper Lower
re Tapa argillaceous pper I Chipola Ac eben :
zstacolonts ieerectonen Hard green Clays, aad these two y Aquitanian. Miocene.
clays and lig- | | P | IVER:
gravels and | | Bluff No. 3, | Bulla River |
nite lignite | uit NO. 3. Bluff | formations.
(2) of section. ower I. G a
* *k * | eS Oe Kix* * * * | * * ¢ * | seem *k #kKIK * * * * klk Ok * ye | ok * | %
Orthaulax | Santo Domingo is the type locality of Gabb’s Orthaulax but its exact location is not known, eee
ae ore probably the basal beds of the Eastern Yaqui Valley. This formationis older than Bowden where Ovihniace | Rupelian. | Oligocene.
: 4 A - |
Orthaulax has never been found. | inornatus.
ks ak pa ok ee ook air aaron Wauske: oeok Sa Rone re sie es ele oleh ake TK seahsted ESE © SEV sins Shc Se si ieaaicen OK dainty roe * * OK OK i * *' kK * FLOR * * OO

Possible lower formation represented by the Monte Cristi Range with Gabb’s ‘‘Orbitotdes.”’
+Indicates position doubtful. {Possible commencement of Helvetian but very questionable.

INDEX

VOL. V.

N. B.—The numerals refer to the continuous paging and plate number-

ing of the Volume, not of the separate Bulletins.

Aclis acuminatoides 7. 50,

fie, Fe salareesencecsescsees
INCL ONE chs cateemee cone eee

ee punctatus.............

se punctostriatus ......

is riomaensis, 29, I...
Acteocina canaliculata, 29,

“< ovum-lacerti.........
erie he Cla e2O" 25 see eens
‘“ triticum-tritonis, 29,

NCHS bipatbltasseeene-ceese seers
18 + FOVROWESXIENS coc ocson sonnoonde
Akera texana Ald, 2, I........
Aldrich, T. A.; author of
Bull. 22, New Eocene

ROSES, 7=Fscsseccocce0ec:
Alectrion cercadensis, 47,
TOs E20) see ate sactea sta dete

gs gurabensis, 7/7, 21

ss losquemadica, 47,

DD aD Oe raans bart cceiesieas

Be preeambigua .....

Aligena pustulosa var. chop-
tankensis Ols., 26, I

Page

305
175

161
176
176
175

177
180
178

178
187
192

301

Amauropsis Guppyi, 79, 19 301

py Guppyi_ var.
gurabensis, 79, 20..... 302
Abia Dial ches Gee Siig eee ee be 172
Aim pad Steginanee a eee 420-428
Amusium mortoni.............. 354
‘“ papyraceum, 60, 22 354
Anachisiexdlisw77 si eee eee 263
x INDIES); nabocesosoooon 258-263
Anomialcdesmacea............. 359
Anomia ephippium............ 355
So) Simplex st ali5peee. 355

Antigona Blandiana, 63, 5.. 381
“ _ tarquinia, 63, 4... 381

ANRC) GOL C WUE, 5 scsecnasoonones 339
Seecampechensisusss see 342
2 GMSMA ..odossocnevaccoe 340
2 COVWSOIHNTE cocosbooseconoe 331
OS CHUA STETS 5660 cseccn00 343
jee Ganiensiguasstmty aoe 336
sepeltliGata: Meeks unc aye emtey 340
Be eet STANT BIS ose sqonscanteacoass 338
8G MUNG OTE caso sdeeooce 332
eval LOM CH Mees scaan aan ie 162
78 TAC OMGTAWE oocde scosscsee0s 343
Soa inequilateralishe ees. 335
‘* lomasdesamba, 56 12 328
‘occidentalis, 55. 3...... 327
oe. PALAU Au i asemaseses cesses e328
gg ADACEICT AN est sath eacaeuseeens Bey

Arcaerelrcuilatanecesascenecee

SCalaris .e.sescuntece:
LOleplarecvcccenecum recess
umbonata, 56, II......
Mirpimiees ye eee ee eesete
yaquensis, 56, I4........
Architectonica perspectiva..
sf quadriseriata
Argyrotheca dalli Ald., 5,
Op1O? Anh ruceecmeete

OPP ieee eee ioc oa.
Aspella scalaroides, 73, I1

NStantes ahataenceeessoeeeeeeeceee

longispinum ......
sublongispinum
‘GO, aL 17 era dageecnea tes
Astyris acanthodes............
WG GIB aLO Vat, 277, Oococvadec
Atys doliolum, 29, 7..........
Avicula inornata...............
Barbatia barbata...............
4 bonaczyi, 56, 15...
oe reticulata, 56, 16..
sf submarylandica...
Bath yarcaysnincaasssersneetesa
Bassler on Bryozoa............
Bassler and Canu on Bryo-
ZO. be cubieets iceeeneee nae

Berry’s identification of
plants\eGscecncoecere see
Berry on Santo Domingo
FOSS Onameae ee eee
Bittium anita Ald., 2, 6..:...
Seas PCLOldesw7aulrjeae
“«canaliculatum, 47,

BINS SOANSS cosaddioonscssoacoososes
Bornia virginiana Ols., 9,

464
Borsenia varicosa, 34, 9...... 215
Botula hispaniolee, 67, 11... 357
Bowden ‘‘fauna’’ not a unit 433
Bowden fossils.............2.0+ 422
Bowden-Cercado relation-
SHIpSAte.uaeweeanepseonee 433
Bryozoa of Santo Domingo 432
Buccinofusus parilis......... 161
Bulla amyegdala................ 183
PrN OS DIGeTitataneea mene naa ae 179
Lei grram oSanite eee vec 184
SS elnydatis ae eteeaeaioe LSA
Pe PaUpencul ages recess 183
oft He Cha sc weakens chosen evens .178
BUG) IEVNGIP sanncosccsscconsscs00 452
‘. Sarahberlineree, 29, 9 183
oie 1s bilaitalnrtys. cee eaertreticee 183
Bullaria granosa, 29, I0...... 184
ie paupercula, 29, 8.. 182
Bullina canaliculata ......... 177
BursayaiiuniSyeeeeeeetee ee eee 273
““ amphitrites, 77, 9..... 273
‘© bufoniopsis, 43, 8..... 272
StL CHASSAN AF OM Fadescnnas 272
Busycon coronatum........... 160-161
os fusiforme ..:......... 160-161
‘ SIGS OTDOI ogooqnoocnc 160-163
Cadulus denticulus-tigris
BO Temenitnticteae seine wanes 324
ie elegantissimus, 52,
GuSiaiieeds staan oem sence 324
ss phemaxw 52. gece 324
Caimiton ese eens see 173
Calliostoma aphelium........ 61
ue armillatum,
AD Marra aebhiastenssecnaenes 60
s grabauli, 50, 19 319
os harrisianum
OlSow2gat7 eee 139
ao datacradl Seeeeeeeeees 161
4 shackleforden-
Si Ole, 255 Bocacosce 140
#o suffolkense
Oleg B55 iS, Qeoancodcncs 139

465

Calliostoma tuomeyi.........
Callista acuticostata...........

Calver

b IDIOT ocoassossococe
Qua Ses o8y coocesgoaco0d

Cancellaria barretti, 36, I...

Gatiendesceeegseeee
Gecaatiyex sesso
epistomifera,
BOWMARCAR IG RRaittant acta
guppyi, 36, 7, 8
gurabis, 36, II,
harrisi, 36, 9, 10
islacolonis, 36,

leevescus, 36, 6..
laticosta .......

E orm ic nemeoncccannen ter

rowelli, 76, 2 ...
tessellata .........

Canu on Bryozoa...............
Cardium aminense............

Cassid
Cassis

cinderella, 62, 4
claibornensis Ald.

haitense, 62, 5, a..
haitense var. cer-
cadicum, 62, 6.........
lasvagratiiinllsecesecee.
lingua-leonis ......
lingua-tigris, 62, 2
sambaicum, 62, 7,
serratum, 62, 8....
tintinnabularum,

venustum, 62, 9..
Virginianum........
aria subleevigata ......
TOW IOKES TA oo docsccanese
HE CIISA Ra seenstbeionen seuss

Cassis

sulcifera, 74, I, 2, 3..

Cardita scabricostata .........
@astenwel aaj eee iie.
Cavolina yn lea ee Hae
Cercadoss eure

«<** affinities of

LOSSIISHee ee eeeeee
DetOSsillS)cussseceee
‘* affinities.........

Cercado faunas related to
recent Antillean.........

SMAPS) heise eos Memeeen

Cercado de Mao section.....
Cerithiopsis smithfieldensis

greggiensis
JENG LER ie eee aoe

Cerithium uniseriale..........

7 se shoninebiasiee eesti teletis Gee
gurabense 73, 4.

ASS MPG Oncor ecoRCERS
miicrolineatum

YP Silene esos tees cee cece
obesum, 77, 19...
plebeium..........
protextum.........

russelii, 45, 2, 3
turriculum, 78, 6
uniseriale, 7,

Cerros de Martin Garcia....
Chama arcinella................

calmitica, 59, 7.......
congregatoides, 59,

coralliophaga ........
involuta, 59, 4,5, €

Chama imacerophylla .........

i riocanica, 59, 9......
@hitonemadalll Weeea eee eeeeeeees
bi CS OMS, WO, Fy Boos
ue hendersoni, 63, 8...
a TAMIL, OF, Fooacscaoacse
a woodwardi, 63, 6...

Chlorostoma nautiloides,
PNY GER aerate Hays (One acsese

Choptaukaysrager recess ce..

Circulus schmidti Ols., 26,

Clathurella vendryesiana,

be uid Ousuemoastrwseck Gs eis
@lavanplebeiatesaiomes- teas

Clayatulavliabiataeeessee cee ;

Cleamitiuncaltane-eee- en eeere
Clypeaster caudatus..........

LG lanceolatus.......
Codakia orbicularis, 6s, I...
Codiopsis texana Wh’y, 77,

ToC ROP) sacce en ean at
Columbella exilis..............
zs haitensis.........
o islahispaniola,
Alix Ba ee cae eeacaigaescrnae
te WEBI) Gooooscee
Conus) berohausies-eeeeeesecen:
GG 1QOIMECAY I, 23, UR acoocec
mf CALEITENCDIS copavscacacosco
oe catenatus, 3/,4; 32,
Te ROL ropes Benne rte

Se CeGOsmuililtityserseces

GG CSRCACISMIENS, 29, Acco
consobrinus, 32, 5, 6
SO aWeN Obl ae peaMion) Licteiae Aanriga jae
86 COMUVMEBANSscca00cosa8
SG ROAVONCIES, BA) Wy Daoaoe
PAZAU Pg Dee eye eee
‘« gracilissimus, 32, 8..

207-209
203
212

203

199

IDSMENS, 370), @)scasdcaccces
TOOTHANEOYPsc5oc000 spoogucer
HMC AODSKCOEIS, Goncooene.
‘« karlschmidti, 37, 14
SO kitteredgeiye sg. 5, 6
IMGAOIEKANBIS ccoaeadoearceed
marginatus, 33, Il...

OWPOMBIMNG A noacoosoaqnooaece
OQHMANGOS, B25 WOscoscccos
gs planiliratus, Be. i @sco
WB" JOROWSWIS, BA, Wl osososce.
CO 5 JOR AMUIOITTONIS) consasndconne:
“¢ —recognitus, 33, 9...-.-
GS SeeNlh, 37, 23-32. Bos
Se solidusiererss CMM ete a
Se" Gt@AENSI sa yecccuseeesuece:
stenostomus, 32, 4...
“_symmetricus, 33, 7...
‘« symmetricus var.
domingensis, 30, Io...
symmetricus var.
semiobsoletus, 33, 8..
‘« tortuosostriatus, 32, 9
GS WANNANUE, 32. MPocoosses
‘“ _williamgabbi, 37, 2

Coralliophaga coralliophaga,

(OV Aalia (GJM ane sem ae areas
uo miocenica,
AD Onesies auton:
Corbula caimitica, 65,
I Roe (Sap eronnee dateudaaordc
He Caribe chewadeeee anes
cercadica, 65, 16, 17
BO GIG; ORNOU NS ococnbagsoeces
‘« dominicensis, 65,
1 EN Eas aa Apes ore a
sry ele@vaitarsasentneemousen ee
GUY NASETICCA Ue nacaunaanecent

Ceo VACA OS RM guacesaaceee

“ _ vinimea, 65, 20, 21..

Cordiera varicosa............+-.
Correlation of Santo Do-

mingan faunas with

' 466

199
212
202
211
208
207
210

199-200

204
202
209
206
209
209
201
209
210
203
200

201

201
205
206
209

361
269

397
397
396
395

396

61
396
395
397
215

467

Cottaldia rotula Clark, 78,

UNO s HMOs Ws Beooseocsas-

Crassitellites aldrichianus
Jara 5 TOL Ne ae ear aae

Crassinella guppyi, 52, 21...

Crassispira incilefera .........

Crenella divaricata, 52, 18..

Crepitacella cepula, #7, 9....
es cepula spiral-
ISEGENA, 27/5 WOsocnese

Crucibulum pileolum, 79 6

Crustacea of Santo Do-
TNMIM OL eeeee ce eeate fans
Clemobranchitaltayeeaseseseee
(COMA, WACETIN, 2. = ecossccopaccee
Cumana fossils ..... Cee
Cushman, Santo Domingo
foraminifera...... Eoawee
Cuspidaria craspedonia ......
ie islahispaniole,

Cyclostrema’ striata............
Cyclostremella magnoliana
Ollg., 2O; Oy W@eccrocose
Cy;thosoma volanum?
(Cima, ZO, UW ecsssoancec
Cylichna bidentata............
Cylichnella bidentata.........
Cymia henekeni, 23, 1.......

CTE RWOOGdyrecemtetteseceee:
Cypreea domnicensis, 45, It
ie gabbiana, 45, 12....
Be henekenl, 45, 4......
as (Sale llateeeeee eae
“ MOWEIN, 25. Saccaccana.
ae patrespatrize, 45, 10
a COOKED, AS, Osconosoe

a spurcoides, 45,
Teen obenasesdaececoasaeten

Cypree cassis testiculus ......

Cypricardia hornbeckiana..

exaSperata........

Cythara caimitica, 75, 14...

ot cercadica, 35, 165...
Clomedtames ap i2eee
SNOB, 255 Uilcocousce
heptagomays.-seusees-

polygona, 35, 13...

Cytherea carbasea..............

NENOCREE Ves at Shee ban Sante
(DIWTUNE ee sogedonee
SUEUTDVUTE so cB oasoonnnes

dissimile, 52, 1
dissimile var.
ponderosum, 52, 2

ponderosom. ....
Diplodonta capuloides, 65, 1

a puncturella......
yorkensis........

Diplothecanthus Dalli........

Discohelix texana Ald., 5,
OEE ee EN Ae Se EOE
Discopsis calliglyptum.......
s derbyi, 50, 30......
Distorsio constricta, .........
en gatunensis..........
Distortrix simillima, 73, 4, 5

Divaricella prevaricata, 67,

quadrisulcata ...
Dolium camura, 45, 6.........
Dolophanes melanoides......
Donax aequalis, 65, 10, I1...
Drillia belloides Ols., 24, 8

wn CeLcadonisyeya io eee
conradiana Ols ......
CONSOTSe gee heer
COUSONS, 47) £5, Ose
COMMUNE od oscecocos

glaucoterrarum,

52
Drillia distans Con............ 60
ei donalbertonis, 35,
RRA ee ABE aes sence 219
sty ecporee Ols., 24, 3... 126
ma SWNTHOMEN .asccocdsscsoos 147
sie fusiformis, 34,
TOS! WI aeaheraenatt 215
ae MUSMOMGANS .caososcceqseo 217
a NSU Tas aN eeecdeteaess 216
sf gastrophilia Ols.,
ZU ATD ere latin hae nar ne 125°
By henekeni, 34, 17. 18 217
bE hispaniolze, 35, 6.... 220
ie nelanbienles, BS. Fo cooc 221
i JAlMAICe NSIS senses seeers 216
* IIGSOGAOVONS sossesassooor 218
86 losquemadica, 35, 3 219
ue magnoliana Ols., 24,
MOM wash ceo aman. 218-219
oS maonisriparum, 35,
usa cersmute cine resiam ae nana ice 220
oF megrawensis Oils.
Bil WB “sc oncdassoqocodoseoe 128
a8 riogurabonis, 35, 2.. 218
a smithfieldensis Ols.
2A Oriatond seadanemoenee: 127
a squamosa, 75, I...... 218
aH venusta, 34, 13, 14... 216
“ LOOK Se sineh sv eiceneee 215
ID USUI SBS, .5 cocoon cneocatoo cas 155
Echinobrissus angustatus
Clark, 2%, O, SB, Bz, A 98
Echinocardium orthonotum.. 59
Echinochama antiquata var.
yaquensis, 59, II, 12 365
‘“ antiquata 59,
NOLS saeco ene 365
Echinoderms of Zone C, by
Jackson ..... Pe auay ie 436
Ecphora quadricostata....... 163
as (HONSTWVI CANA, cacoboncoan: 61
Ectracheliza truncata, 7,
Tyce cis ch Aaa ane lect 257

El Morro de Monte ‘Cristi,

Ceolomywolee eee es 447
SOCHOM Alocacceccasssceas 448-449
E1 Morro as understood by
JS(SMEOKEM coococavovchconss 445
Enallaster bravoensis Bose,
ZO One G tem ae Aa NERY Osea 100
fn traski Wh’y, 22
TH ESR EAES Lean et emer 99
Ensis schmidti Ols., 70, 1,3 53
Epitomium cercadicum, 50,
Stee hecunen ee use satelaaae, 304
“ gracilentum..... 304
a minutissimum,
DOOR Ome cen ne ie gOS oe 203
et riparum, 50. 4 303
s textuvestitum,
OE ac ameebaocdoneeD 304
Erato maugeriee var.
domingensis, 77, 8.... 282
Ervillia meyeri Ald., 7, 7... 5
Hrycina regifica Ols. 77,
Oe Omer rnnonenacs SAR Aaa 55
n [Rey alist as sete saaadsncacen 395
JESCAIASONIES. 555002 Scvodcocosonose 168
Ethalia alexanderi Ols., 26,
Tape pa rales Net 142
Bulima acicularis .............. 306
Sh A@ICWIEIA, ILCAlsconoe: 2: 8
oS @exigrermnls AUG 35. alee 8
SC Mer moFEISS USA coscoee 8
Fasciolaria carminamaris,
50 Ded atursosmanteescenes 245
ue fusiformis ..... : 244
ae gorgasiana ...... 245
ue SAKANMNISET...oesc000 245
- intermedia...... 244-255
a kempi, 35, 4...-- 245
oY semistriata, 39,
tie Sat onsen omancnp cr aie 244
is CUULOA nascoccecoaee 244
Fissuridea alternata, 50, 22 321
us henekeni, 50, 21 221
Jelkoyea Ort ONS 18}, IBXETAY canoe. 435
INORG, HOSES, conascnesoacceecee 425

469

Fossarus dalli.................-- 61
Fusus eucosminum.............. 243
BE JRE HIEESTISIS Se04ocnnanbonocce 243

, * henekeni var.
haitensis, 75, 2:.......- DAR

‘¢ henekeni var.

WOEMIOGM, Rely B canosonovoe 243,

Gabb’s collection of 1873 ...419-420

ve Sabaneta section..... 445
Gadus domingensis............ 224
(Gait WORSIS. cocossodsccacdeseec 424
Glattidiayallivaesesteseeseeeee 59

ang ebantie-eeeeeesese 59
Glycimeris acuticostata 52,

FA lh aceon Aaa 344
Glycimeris jamaicensis, 52,

TB eens sesanionticae 345

os (REUIESREY oscoccubocc 162
Glyphostoma dentifera, 35,

IMO ReRrE codereee nce cbewe seen 225

es golfoyaquensis,

35) Te 7eaeobeseasosaananecect 225
Gouldia martinicensis ........ 361
Glottidia inexpectans, 72,

Tee Qe hosted renee eek 59
Goniopygus budzensis Wh’y

LOMO Aaah cere nese go
Guaiyaibitaes eeatteceenosscnace 169-173

ne Glock avosgasecasennce 446
CUENTEIOWTNEMIO coonescenocacosnec 173
(uuiralbopeeseesena SSE GR ERO NOE 171
Gutturnium gracile var

gurabonicum, 43, 10.. 271
Gyrineum crassum............ 272
Harris’ assistance.............. 166
bias tuilarsiimnpolxeeeeeeeeeeeeeer 161
IlahWo) WAKE (Oocosrodon cose aceon 172
Hemiuaster calvini Clark, 22,

Ase all aA eters eet ae 102
Heneken’s localities..... ..... 168
Heterocerthiopsis Ols........ 136
Holectypus planatus ?

OSTA, 2. W=B cacesaccce: 6g
Hesperonis regalis............. 75

53
James River Miocene cor-
mela One Olsieeeseeeeeee 60
Jackson on Sanro Domingo
echinoderms............ 160, 436
Kuphus incrassatus............ 399
Lambidum domingense...... 276
Tampusia pileare............... 269
Lapparia dumosa............... 242
IPAIoWEWS, ExaING, AO), Me cocsdoeodoe 247
or fusiforme, 70, 4.....- 247
“A infundibulum, 39, 3 246
Wedarpelitelilanys2inQserescneeeee 325
ILFMIGOCV OWT ccicde asccoesosae 431
Levifusus indentus Har,..... II
_ pagoda Hp. var.
AF) Olean tuwseeceeniees II
= suprapanus Har.
Bis A eae dala tleclateOeere II
Sf sutsiot ANIC! oososocboo II
‘ trabeatus Con.
Valk sib ae deaicientesneesene 10
Limopsis hatoviejonis, 52,
MeIeserensleuhe st leee eee eS 326
86) OVAINS, G2; WOsdoosooe 326
“C SilbaiagANlANES 5.2 ce0c0 326
Lirosoma sulcata var. mul-
ticostata Ols., 72, 13 45
Lithophaga antillarum ...... 357
a MVEA), scooosodeodoce 358
of pectinicola Ols.
2? OA Diwan enn enaca enone eRe 146
a yorkensis Ols.
OAS Osa Or snacnemeceee 51
WOSe CAODAS steamer aee acest 170
Los Caobas plains, 28,...... opp. 170
WOSPEOMASH yaceissance each ee ee 172
LOS QUEMEGIOS. co-scncscc0006 ice 169
Los Quemados fossils......... A433
ne Se SECHLOM Sete eee 434

Zone A fossils 434
Zone B sa 435

(a 16 Zone Cc ay 436
os oS TSS ID) pe 437
os C8. Lose 38, te 438

Los Quemados Zone F “

ah co eG
Lucina chrysostoma, 67, 2
a SESAME . cconcseoseccoe
if jaleAuibatehnonennodcononastee
FACISIESIS sconscoosssces
Lyria pulchella, 37, 10, 9...
Wyrschapas te SeMeseeees.s-
of harrisi Ald.. 4,

IMAYOONDOKO ss}, coocsccsoccoccdonodobs
Macoma constricta............
us hispaniolee, 65, 9

OS yaquensis, 65, 8...

Miatctraval aitaeereeeeeeeeecere ace:
Wigley CATONOTE)...c0060 opecoszooe
Mamillaria mamillaris.......
Mangilia elongata.............
uA emissaria Ols., 25,
Gumekanccaedeoneaonaee acne

os Critimay.cwewesss ct.

ae lalonis, 35, 10.....

eS magnoliana Ols.
DS Te eden sacs aseestuiece

se maoica, 35, 9....-.
ue poly. gomabesessecess

xs smithfieldensis,

ONS he AGire NAR ABoddsocadece
Marginella BOAUTEL, coongoosesb0s
Bt CAWEWMENE) socaobdo0s
cercadensis, 37,

Og seteases ease ere ieee

a8 chrysomelina ...

sf coniformis, 37,
Bal ete apenas lancaacoces

us christineladde,
UZ AO Wns aeneigns en neers:

st domingensis ....
PAURENE), oooaoceasess

os hispaniolana,

AG fest Relist a can Sano Ronen anne

“ IAVGISSTVOMNE, — soocasds

a limonensis ......

439
439
266
366
366
37°
237,

TI
167
390

SOE
gu
395

300

470
i maoensis, 37,
Ti Reneeesn apanirnaeeee esas 235
a Newman ........- 236
ss ©@)SES scasscccooedsos 237
Be ONCE ssoacsoecce 235
us schmidti Ols.,
BIG Oe Ath gudrates a oe oe 130
ef sowerbyi ......... 235
ue taylori Ols., 25,
eae eae eae 129
Martesia sancti-dominici,
G5 Qa hv aaa oe 398
“sancti-pauli, 65, 22 398
Wiavetiiin Case@ialcnscocossoosodsoe 5 ES

Maury, C. J., author of
Bulletins 29 and 30.. 165-460
Santo Domingo Type
Sections and Fossils

Melanella cereadica, 51, I... 306
os jeCualeiaa, Bitsy We cae 207
ns TALON Canam leno eee 206
a tethyos, 57, 4..... 307
Melanopsis cepula.............. 285
Melina maxillata............... 160

Melocrinus harrisi Ols., 6,
Ta De aaa ctaietcl ie 29

HS reticularis Ols.,
Tesora sea eke acts 7

os williamsi Ols., 6,
EAA a be delete ai on nee Gen Ta AR oe 20
Melongena consors, 40, 5... 249
a Tel OmSeMabe ees 249
IMetakepamiellliaieeeeeeeescee eet 258
SE ISIAVasho~yaIOM A. spocopcanaces 257
B0 perplexabilis, 77, 4, 5 258
Metula cancellata, zo, 16... 240
Metulella fusiformis, z7, 28 253
“ venusta, 7/, 26, 27 253

a williamgabbi, 7,
BO iernsbitenstenacnee neat: 254
Metis trimitaria..:3...-......---- 3,90
Mitra berlineri, 37, 15, a....-. 240
Sth vail OSA eaee te ceeee ce ies 235

471

Mittravlonivay 37. Wie Ula...
SU ramanbinl Ols,, Ae. ail,
US saapilllbwaveRtoyaul “5 ..sdeasb6deoc
eee PSGEUT Waluiixaw7ONN I 2
CO ALCS se cacartis sketch ct vers

Gh Sym GCA) <cocecoocdeees
TOS ASME 78, WIL: Blscaneoaaacs
Dh 5 WONGLUOSA, 7) UG scoouwoo-
ae

quemadica, 37, 12.....
Mitromorpha smithfield-
ensisi@lsnees ince
Modiola corrugata..............
Modiolus cereadicus 52. 16
gigantoides Ols.

OpV TL aR rae needa asuacnacns
th SAO DJONS scone ocons5ess
fie TAAO MIS 5 Qe 7eee

pLUleine tS = eetaee ee
- pulchellus Ols.,

UP PASTE RA Bons anic hs
a silicatus Dall.....
a (HOU OWS 56 son decesece

Molleria harrisi Ols.. 26,

NS) wT) se oemeetonnees

a smithfieldensis
OSS AG Tepe ie ee

Montacuta cercadica, 65,

# hispaniolee, 65, 4
TAO LCA NMOS a enee=
Mitomntie (CraiGiol coseecqa buecoconaese
Morum do.ningense, zy, 7, 8
Mulinia congesta

Miwiress euimulliasemran —— 2 22 cceon
IDRENNUTONOIS sosadoce0 sense
compactus, 2, 8....
Murex ccrnurectus, 72, 9,

domingensis, 72, 3,

HPI Oe ot haat SIRE EeRCHCG

TNS CANCSOS, pao -cedbonoue
ON messorius, #2, 1, 2...
oe preepaunillus, 2, 11
oe recurvirostris .

Or “I <

on ~I

Scalaroidesm-sc- nee

ialba tier gy UbGy ee Asuedtenie.c. pase

So SRIGTMSISS, WD) F/ cose
Murfreesboro stage............
Myrtzea lomasdesamba, 67,
Busia ccm tacaeenh havtack ote
Mysia capuloides...............
Mytilopsis dominghnsis, 65,

ANIM ONG WE). ..esescconeaased

IRD Seon Sodotasdudclarasoussoboe

HOME oseaate co mecioc sae seman:
“* gastrophilia Ols., 24
acre eas beg
Sp oT CaSSa taraane ae nee ne
: lineata var. magnoli-
aio, OS: Ba Sh. sosceasn.
Boe Sperall tana ete meecene
*‘ shacklefordensis Ols.,
2S aA ceecs nie meni eee anne

smithiana Ols., 24, 2
INaSsaiciay olyotale-e eae

se Olsson, AG; 2D sacdsove
Natica canrena 49, I0.........
2 [SSTAVTCI 5005 sa5c00
ai phasianelloides 49,
MQ ernie seers NRCm econ
oS SUUICATE, AIO). TU coeoooocce
YOungi, 49, 11) 12.2...
INeserazalteniatalprecses esas:
Neritina figulopicta, 50, 10
=i [OWN OA) sooccossceocs scones

! unidenta Ald., 5,
Tigi Seo crieee ter ce ecaer

WEIGIS) < sconoon :

4 viridemaris, 50, II

Neverita nereidis 49, 17, 18
Niso grandis, 50, 8
Nitidella cibaoica, 47, 3, 4...
IIBENTSANEAY, ascot eae ghee
INS enten ee ceeae eee athe

me MO wh WwW
I DH O
Oo GH ~I

Noétia maoica, 56, 17, 18.... 330
Nucula tenuisculpta. 52, 8.. 325
Nuculocardia divaricata...... 358
Obeliscus canaliculata ........ 308
Odontornithes ee 76
Odostomia claibornensis
NUL cS (att CAE RUS 9
ae yaquica, 51, 22.. 315
Oliva brevispira, 76,16, 17, 232
‘“ eristobalcoloni, 76, 15, 231
" (eybiiravebeeay, exo), Til Blase 231
See CoA Cll ean a eaeeaaee 232
IbeETRANtA, «dog ccosbosdodneD 231
MINIVC aetca seid arene ae ones 233
Se OLY Z Ae uae enaen tain eens se 233
“a treticulatar, ovaa: ae, 231
Olivella indivisa, 77, 3....... 232
‘« jaspidea 233
=) muticoides, 37. 1s: 232
is We var.
canaliculata, 37, 2.. DOP
‘* sancti-dominici, 37,
Ale eoeM anu etee ated acest 233
Olsson, Axel, author of Bull.
23, N. Y. Dev. Fos-
SiS NOH 72m eee. sumaeseaaaes 25-38
‘“* Bull. 24, Neocene
WOSSINIGS P52. ccscscsadcoee 41-72
‘* Bull. 27, Miocene Fos-
SWIG) AZEZOs schsocsdooocobe 121-152
‘* Bull. 28, Murfrees-
IGYOVRO) SLAVES oococcoon dance 153-164
i -Asxell collection. ---.- 167
Oniscia domingensis.......... 276
Onustus imperforata.......... 298°
(OVTEMEOGKES sacosoasebonconsodesoecs 430
OKAOMCOVTES Sooutacooscnospoos bees. 420
Orthaulax inornatus, 47, II 285
OxthanlaxeZonerreceeeeeacetcee 425
Oscillations in Santo Do-
SOODIOYEXO) sagabdnanopacdoososos 447
Ostrea cerrosemsis .............. 347
Ostrea disparils............ 62, 159, 163

‘« gilbertharrisi, 32,

TOG sae maucte ume eee ane
sf haitensis, 57, I, 2.....
ms PELCTASSaseeen
By Scull peumnatayeeeee sees
es megodon, 60, 3........
nS WSEMUOMINS Adu sooudoosannone
ghee SVATS Lin Cale ws Ganesan

Ovula wise-woodi, 48, 17....
Pandora inconspicua, 52,

Panopzea whitfieldi ............
PECK CACHACEIS oocossccooevee

: caimitica, 60, 12......
cereadica, 60, [1......
CHAWOTMEs srccsosoosssa
decemmanins | =222...5.
EDORCIS esa

humphreysii ...........
OMISTSOMNWS Lo oncnaneece

madisonius ............
oS sade VAOWS scoocesunee
marylandicus .........
MOVIE WS asad dons eoasee

st Sooo ONS. 75 Wy Do
ie BOO pcgacaaasanoetodo0adns

We NEMS, CO, Os socosnone

a thompsonsi, 60, 9, 10

ae vaccamavensis Ols.,
Siu Taoe tisk ieee meee

G0)” SYANSALONOD IIIS oaoccnocsaepocc

GG SAbReAloheR IBIS) cooseocsceed
Pectenculus acuticostatus...
us decussatus .....

a peulMaceamee cess
Periralpmalasxailllaitayeeeeeeeeeseerees
Persicula catenata ........... :
GU multilineata ........

473

Persona simillima..............
Petaloconchus domingensis,
7 Ombre aise eciee streatsels
cc laddfrankline,
A Op Z wee cesaceesrdacese ce
a sculpturatus ....
Petricola coimitica, 63, II...
ae grinnelli Ols,, zz,
Fi. TO Geren eu sega abies ied
se riocanensis, 63,
LD eraser cstenee nncaseatc es
“ TODUStaseresecese: aa
Phacoides actinus..............
ss calhounsis.........
BS cercadica, 6/, 5..
fis childreni ..........
es domingensis......
hillsboroensis ...
a hispaniolana, 67,”
Leases SE Beet ae OSC RO EEES
ae riocanensis 61, 7
oe smithwoodwardi,
(oP cai ov aneactocaroneenors
oi wongi Ols., 5, 2
se yaquensis, 6/, 8
Phalium moniliferum. zz,
AEG ah) lees: Biseceear
Phasianella punctata, 50,
1A Teese ned eaancey SBBSREne
ee tessellata .........
Phorus agglutinaus............
@electuspre-mes ceca

SOON, AO, O soooos:cusee
guppyl, 70, 9...
85 MHS UMMOVAES, AO Wccane
moorei, 70, 7, 5, .
‘“ semicostatus, gu, II,

‘* veraquensis eet
Pilsbry and Johnson’s Work

on Santo Domingo

I OSSIIS Sarees pean encima
Pitaria acuticostata, 63, 2...
Be Carbasealas--eeeseteetes
SS @SRIGKCAS OF, WOsds50-

te Shrove, OF) Wocsasser
ee planivietaksOsnea esse

Planaxsis crassilabrum......

COME Batre esata aaa
Pleurotoma elegans...........
6 AUG, so5ccccen08
SG alesi@dotaleeeeees
‘ balisnetititeseeenses
be (COMGOS sooossass
Es haitensis ........
Bo henekeni ..... DUD,
4 jAGMet SIS user
oe marieana Ald.,
ERE S YO RNTE oP ee ane
me squamosa.......
st tuberculata.....
re venusta .........
ss WAUEEAO) acoccoeseue

iicatnlardensataseeesereeeees
Plochelzea crassilabra, 70, 3
Polinices stanislas-meuneri,
AQ U5), UO ascites. sees

subclausa, 79, 15,

Polynices subclausa...........

Porto Rico—Santo Domingo
found affinities .... ...

Potomides denticulabrum...

ws OMoNS, AS; Ssesooo

Prionodesmacea ...........--..-

Protocordia diversa............

“ gurabica, 62, 20
islahispaniole,

Goi hiclscca ae ataannencee

Psammobia gubernatoria
var dalli Ols.. 25, 2...

Psainmosolen sancti-
OkoriaVNTHIO, OR, WAsccacon

by!

Cn
(oe)

IN Cy a eianee
Pteria inornata, 52, [4........
JHUSRO/DOGIA) sosaccgsnosboos s6c0ec00
Pgs), IPMBYe) 5 .=. scoqcovceas4ooe
Purpura miocenica............

RAOXOGNY 0282 Ge dadaaouds
RustllargiapmlclenSessesseseeee
Pyramidella arionis, 57, Io..
oy eanaliliculata,

‘Gild (Gisaseboonedcckeneccs

ie jamaicensis.....
olssoi, 5/, 8...
if semicanalicu-
IEMA, 64%) Daca:
Pryrenllla, COVISONMS oosoessccouscccc
1 jamesi Ols., 72, 14,

of meTOMP et alipeieereacer
a OMIISIBYAVAL Sak noboorcoosecen
Ranella crassa
Rashitoma parva..............
Rathbun on Crustacea ......
Retusa claibornensis Aid.,
DMA ee taMe seen etitectace
He yaquensis, 29, 6......
RAG Aisa) + so sodccs0abanadgacacee
RA On CaMmaescusneissuceeseenc esau
Rio Cana section...... ........

46 Ce

(a a3

RIG GuayMbLMCitO- pees eee:
Rio Gurabo sections ..........
RSIS) Wray ill soncee “oboe anccadane
TRG) WGP cg ose seacboscensadcesc
TRANACIIECIESTO nonce -escbecosocedee
Riha@higlossaesse Waser ie:
Ringicula dominicana, 29,
fit cocbou e600 -seeden son6000e
ss hypograpta ........

Seni Stistaltalyrcesees:
traGdenitatalestesees
Rissoina crassilabris, 47, 19

“sagraiana, 47, 20...
Rochefortea filicaticola

OSs 72 UWOy Wescosaoace
IROATNOWINO) scaded 2-2 cosusoscseecns
Route of Santo Domingo

expedition of 1916...
Sabaneta ope ctes te coer:
Salenia valana Wh’y, 75,

I UO sy ccersseiee cae eee ee
Sarmibasi sinc saa-seneneeneeencee
Samba Hills geol. notes on
of Bull. 29
Sanguinolaria smuthwood-

YWENCHs Cully Ws) Doctooccras
Santo Domingo species in

common with Bowden
common with Cumana
common with Florida
common with Gatun...
common with Trinidad
Scala dupliniana Ols., 24, 14
Cn itelienicaereeeerete seen:
martiniana Ols. .......

reticulata Martin.......
“ sheldoni Ols., 24, 9.
Scalaria minutissima .........
Scapharca arthurpennelh,
CGB. OL GORE snase oe case
auriculata, 54, 3..
caimitica, 56, 13...

ae cereadica, 55, 5.--
be chiriquiensis, 54,
Dane Ne ere Vie eae
ae cibaoica, 56, 19...
os cor-cupidonis, 56,
IS OMT ie In aR eee
oe cumanensis.........
golfoyaquensis,
AUIS mica nem ahaa <aecc meets

27, frontispiece

(Ss) (Gs) (GS) Os)
Gy) Gs (sy os
SNe)

(S$)

475

guayubinica, 54.
ARR GN Gps Sos) a:
ie henekeni, 55, 2...

oe hispaniolana, 56,
us incequilateralis,

losquemadica, 55,
TL oteidsecp tices eetie stains ‘
; margarete, 54, I
sé patricia, 53, T.....

riocanensis, 56,
avait riogurabonica, 55,

oe willardausteni,

aS sculpturata Ald.,
Bids eee see Sones:
Schmidt, C. P., collection...
Sconsia lzvigata, 45, 2.......
Sentibranchiatasess- eee:
Section at Cercado de Mao..
ee Bite CzhbaobhtO),<s-snccosocc
Sections on the Rio Gurabo
Semele claytoni, 67, 9........

“« nelliana Ols., 70. 5-6
Serpulorbis granifera, 75, 9
Y papulosa, 45, 10
SlreldontonpAicas a ceesea
Siieldomelllaeneesaee sees
Shufeldt, R. W., author of
of Bull. 25; on Hes-
POKOMINS, VAR Soonssee
Sigaretus clarkensis Ald., 5, i
a gatunensis .........
Siliqua subzequalis, 65, 12...
Siliquaria gurabensis, 48, 13
Simpulum antillarum var.
cercadicum, 73, 2......

> Pilearere sees
Sinum chipolanum........ Aare

pennelli, 55, 8...

Sinum excentricum........... 202

oS gatunense; FO, 2.....- 302

HS MOMENI, GO); Tcococdpees 303

HR PELSPECtiviuitaal sees: 302
Solariella shacklefordensis

(OE TPM OSs oe aurea 47

Solarium gatunense ........... 205

«ec

granulatum, 49, 3 295
pretfemorale, 73,

Eck face te nace Sone 270
ne quadriseriatum, 49,
Ie ei seneneon ain aeaeeee eee 295
se stonemane, 49, 4,
ys ea EN tie Seine 296
SoOlemmMopliqMmmsierssseeseeeeeee: 394
Spisula harrisi Ols., 8, 5, 6.. 52
Sen Suibponderosam eee: 161
Sponcylus americanus..... .. 355
He bostrychites, 58,
U Mesa are tea aarn et 254
A ~gumanomocon... 355
Sits MRNAS SUSIE. oo cscn0: sterneee 155
Stratigraphy of Santo Do-
MUI S ONp a Ee oaamaeeetcer 453
Strigilla caimitica, 65, 7...... 389
‘““ pisiformis, 65, 6..... 389
Strombina bassi, 77, 17..... 260
i caribeea, 7/, 6.... 262
x cyphonotus, 77,
F[ppeios Boone eanaaseScOeCUEE 261
divilitus, 47, 12.. 262
ss @xaliSteee cn seeoseeen 262-263
es Sal aaa eeere 261
ue gradatayas.scgeiks 261
es haitensis, 47, 18 258-259
3 lessepsiana ........ 261
nanniebelle, zr,
Ty i TO te a sa me 260
“ nuestrasenore, 41
sliahieactetsterers aiatielsis etsy 262
y [OPAIGIOME, 5 cecocoe bees 261
5 pseudohaitensis,
Hy MD WB yn 250

ve se

var gura-

IDES, Wis WAL pcccdca0
Strombinella acuformis, 77,

e Toss nc cece cece cece reccecerens
Strombus pions: Ho Dy B
eS bituberculatus ...
et AMUUUES ooocosoosnedou
aS haitensis, 76, I...

vg maoeénsis, 47, I

uo proximus, 6, 4
iF iaaiciseites wueae ununssteee
a FODYEFUSIS ontingoacccoce
oe pugiloides, 46, 6
Strongylocera guppyl.........

Surcula jaqueusis, 34, I

COeel al iatanyec 7am tener:
‘ riomaonis, 74, 3..-.--
MUESTOSAOSSE, coccecooponvosacnss0
Tectibranctuata ...........000++
Teinostoma cryptospira......
2: MEVTNEVIR a5 scooeaee
a miocenica Ols..
ZOTAR MG i jeNnstncntiees

a sandomingense
FD, Dibkssones ansasones 0600
eS thompsoni Ols.,
Oy Bp Alocooopapovosanacc

oe variabilis Ols.,
Neate Wagers kaa Sane
Teleodesmacea ...............65.
Tellidora crystallina...........
Tellina cercadica, 64, 9......
“ cibaoica, (Zh, NO ecacse

‘« crystallina, 64, 4....
-‘ islahispaniolee, 64, 6
GO saoeOrieel, OAL, GF sonbocooc
GU > SaobPENEN Eo poascocodosoHooor
SG OSWIC TI AADIS poanooneossens
SC jorxonlermnts SUG Ji) Sec
“ riocanensis, 64, Bee
‘« sancti-dominici, 64.

GG ean” Ml, WAsccosccce
‘“ subtriangularis Ald.

‘« temperata Ald., 7. 6

476

Tellina waylanduaughani,

64, is ose sodddeanto asin : 386°
Terebra amitra, 29, 21........ 192
: berlinere, 30, 7, 8 168
an pipanbitaseeeeee 188, 189, 190
i SE SUNBON RA ss 187
pe cambiarsoi, 29, 29 I9l
ch CGHAWS, Ay W7arecccoe 189
i dislocatamereacee sas 188-192
se gatunensis, 30, 5... 195
oe gausapata var. leevi-
fasciola, 26, 19...... ‘QI
os haitensis, 70, 3...... 194
“ ineequalis, 30, 2..... 193
He Oligomiiltraleeeee eee 189
a s 2Q), Soe 190
me {OSUUGL, FO, Accoccaassoo 195
a [DROW GOs Woessoe 192
eS OVW OUSLAL sacnaavansocoee 186
Ui spirifera, 29, o 16. 188, 190
0 SHICHI, BO, Toscoc 156
a wolfgangi, 30, a 197
tesvedls incrassata, 65, 24.. 399
oo SAEs tll Gis see eeneeme ee ae 399
Thais clarkensis Ald., 3, 2.. 7
Tornatina coix-lacryma...... 178
BU canaliemlatayenee: 177
a ovum-lacerti...... 179
a NECtaNuNm EE s 178
Moxo glossaleeieewas ieee mennen 186
Trichotocrinus, n. sub-gen.. 27
Triforis calypsonis, 47, 13.. 286
eid aldptOssilspeeses = eeee eee 423
Triphoris bartschi Ols., 26,
1 rer Reece TAS ana aE 137
a dupliniana Ols.,

BOS Gravis tore seas cian 138
Tritia golfoyaqueusis, 41, 24 256
Anion ELAN ORANLIS,, ococsooesobor 270

af gracihis. 2 tee seee 271
is Pileane are se= eeeeeeeees 269
a simillimus ............ 271
[ritonium lineatum........... 269
Trivia globosa, 45, 13......... 281

477

Trivia islahispaniola, 45, 14

‘« suffusa var. sancti-
domiinici, 45, I5........
Trochus conchyliophora.....
Turbonilla ovoides ............
a scolymus...........
VUNG INS cocseconsose
lOWUKETGS Ec goscconee
slincbokeastanetsu asses eee
‘. _ erenulatoides, 50, 14

‘« dominicensis var.

LENG GO, W5scccossnnacoss
Turbonilla agrestis Ald., 4,
Drie SOARS sa ohne
oe augusta ............
bt catalineata.........
ss cercadensis, 57,
Tes Sense ce geccmnste ase
BY dominicensis, 57,
V/s laces GEEG ACES ECM ROES
a karlschmidti, 57,
NGS B ESE SAAS CERNE ae Nee
as mitchelliana Ald
9) Booseavponc0scsc002 codes
3 nanniebelle, 51,
PAO Pen GO OE Meee:
ogilvieze, 51, Il.
aie olssoii, 51, 16....
ag riomao€nsis, 51,
MO neeeeisa ee etecadene sean
ve turritissima, 57,
TPA aca Chins CuaceeneZ ee
rs turritelloides, 57,
LO). he ieetecte eenasacess
ia}

yaquensis, 57, 12
Turricula bullennewtoni,

Turris albida 34, 4-8.........

: COVMMTTIDIONS), ooossoonesenne
Uerehenekeni. 5.0 ee AND.

‘ ATA NtanstSheeeeey eee eee

“0 SOPRENINC Sn ocnceeratecasee

oe VETS Gali cease antes

Turritella bipertita............

Turritella indenta ...........
oo mimetes :..........

s planigyrata, 48,

TA i ee acer eeeetita ne

ss plebeiasa ee

a submortoni, 48,

DG reece ace sse eens

“f tornata, 48, 15...

by plisealatuse-sssasc-aceeuteese

cercadicus, 42, 12...
harrisi Ols., 9, 7, 9
Vasum dominicense var.
gurabicum, 39, 7......
CH POMA CHIN ees -peee==s
Os haitense, 39, 6........
Vaughan on Santo Domingo

“é

sé

COTA Seen nae eee 166,

SOs 3h secesens saaceea le soan

a scituloides Ols.,

ONES SHUTVCE) Sen acnconsooes
is OrbiculardSmeye sear
i Pap liapaeemcece ser

papulosus..........
sculpturatus.......
Vitrinella striata, 50, 23......
Nolutaypmleheliapere-ssesssees

ied

Volvula cylindrica, 29, 5....
ee ObGyn cnconsogpeccascen
Whitney, F. L., Echinoidea
of Buda 1’s, Bull. 26,

ig Oe Neda, Lie an ee gees
Xancus preovoides, 4o, 18

i validtis), 705) 5peeee-c 247
Xenophora conchyliophora,
YQ 7 hs BEEN rae. 207

delecta, 79, 8, 9.. 298

478
imperforata....... 298

Wa CHULA, Sete ate ates ee creer 174
-Yorktown formation.......... 61
cE SUBVEE Soeancednaccosss 155

END OF VOLUME V.

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