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UNITED STATES DEPARTMENT OF THE INTERIOR

UPPER CRETACEOUS AMMONITES 

FROM HAITI

GEOLOGICAL SURVEY PROFESSIONAL PAPER 214-A

UNITED STATES DEPARTMENT OF THE INTERIOR 

J. A. Krug, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

Professional Paper 214-A

UPPER CRETACEOUS AMMONITES 

FROM HAITI

BY

JOHN B. REESIDE, JR.

Shorter contributions to general geology. 1947 

(Pages 1-11)

UNITED STATES

GOVERNMENT PRINTING OFFICE 

WASHINGTON : 1947

For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C.

Price 15 cents
CONTENTS

Abstract-...-..______.___-..__._._.__.,___.__^_-_________________________________ .____-_-_--__--__--__-_ _ _.. 1

General statement ____________________________________________________________________________ ________________ 1

The fossils and their correlation_________________________________________________________________________________ 1

Description of species __________________________________________________________________________________________ 2

References---_-___---_--__---___-_-______________..______ -_-___--__-______-__-_-___---__--_-_____-_--_--__-.-- 5

Index._______________________-__--____-______-_-______________-___-_-___-----___. ___-_-___--._._.__-_ _._.._ 11

ILLUSTRATIONS

PLATES 1-3. Cretaceous ammonites from Haiti_____________-__--__--___-______-__-__--___ _._--__ .-_ _.___ __. _ 7-10

n
UPPER CRETACEOUS AMMONITES FROM HAITI

By JOHN B. REESIDE, Jr.

ABSTRACT

Ammonites of the genera Baculites, Parapuzosial, Pachydiscus, 

Texanites, and Paralenticeras are described from Haiti. Two 

new species of Pachydiscus are proposed. The age of the fauna 

is interpreted as late lower Senonian.

GENERAL STATEMENT

In recent work in the Republic of Haiti Messrs. 

W. P. Woodring and L. S. Gardner, of the Geological 

Survey, made a collection of Upper Cretaceous ammonites that seems worthy of record. From the neighboring Dominican Republic Gabb (1873, p. 87) long ago 

reported an ammonite and a dubious baculite, but the 

writer knows of no other published report of such 

fossils from the island of Hispaniola.

Dr. Woodring has kindly supplied the following 

statement:

The ammonites were collected from boulders of weathered, 

relatively soft calcareous sandstone, containing pebbles and 

granules of basalt, at two localities in Riviere Corail, a southeastward-flowing stream entering Grand Riviere about 8 miles 

north of Jacmel. The country rock is basalt, part of an extensive area of basalt in the interior of the Southern Peninsula. 

About 6 miles to the west-northwest limy sediments interbedded 

with the basalt and including basalt pillows contain caprinids 

indicating late Lower Cretaceous age (Aptian-Albian). The 

fossiliferous boulders found on Riviere Corail may represent 

sediments interbedded with the basalt, or an Upper Cretaceous 

formation overlying the basalt, or may have been derived from 

conglomerate at the base of Eocene limestone, which overlies 

the basalt at localities examined.

The precise location of the two finds is as follows: 

U. S. Geological Survey Mesozoic locality 18723. 

Petite Riviere (or Riviere Corail), about 2 miles northwest of junction with Grande Riviere de Jacmel, Arrondissement of Jacmel, southern part of the Republic of 

Haiti.

U. S. Geological Survey Mesozoic locality 18724. 

Same as 18723 but 200 feet northwest of junction.

THE FOSSILS AND THEIR CORRELATION

The ammonites contained in this collection are as 

follows:

Baculites sp.

Parapuzosia? sp.

Pachydiscus ("Parapachydiscus") gardneri Reeside

732202—47

Pachydiscus ("Parapachydiscus") woodringi Reeside

Paralenticeras sieAersi (Gerhardt)

Texanites ("Mortoniceras") cf. T. canaensis (Gerhardt)

The nearest recorded occurrence of Upper Cretaceous 

ammonites in the West Indies is that in Jamaica reported by Spath (1925). From Providence, near Port 

Antonia, in shales underlying a limestone with Rudistae 

and rather low in the sequence, were described Epigoniceras sp., Parapachydiscus aff. P. stallauensis (Imkellcr), 

Parapachydiscus aff. P. gollevillensis (D'Orbigny), Glyptoxoceras cf. G. rugatum (Forbes), and Baculites sp. This 

fauna is assigned by Spath to the upper Senonian 

(Campanian-Maestrichtian).

From Jamaica also Trechmann (1936) reported the 

occurrence of an ammonite in "probably the lowest 

known fossiliferous shales, 800 feet below a Barreftia 

limestone," that was identified by Spath as Nowakites 

aff. N. paillettei (D'Orbigny). This form is said to 

suggest a "Senonian (upper Coniacian or lower Santonian) age."

The next nearest occurrence of Upper Cretaceous 

ammonites is that in central Puerto Rico recorded by 

Meyerhoff (1932), who reports identifications by Reeside of Barroisiceras aff. B. haberfellneri (Von Hauer) 

and Parapuzosia aff. P. corbarica (Grossbuvre) from 

tuft'aceous deposits. These were assigned to the lower 

Senonian (Coniacian).

A third occurrence is that recorded by Rutten 1936, 

pp. 35, 36), who lists apparently preliminary identifications by Jaworski of ammonites from three localities in 

the central part of Santa Clara Province, Cuba. These 

are reported as from limestones intercalated in the tuff 

series, which underlies the Habana formation, of 

Maestrichtian age. The forms found at the three 

localities are as follows: (1) Austiniceras dibleyi Spath, 

Pachydiscus cf. P. colligatus Binckhorst, Peroniceras 

aff. P. tricarinatum (Fric) Burckhardt, P. cf. P. csorrigi 

(Redtenbacher); (2) Peroniceras cocchi Meiieghini, P. 

aff. P. tricarinatum, Crioceras sp.; and (3) Austiniceras 

dibleyi Spath, Barroisiceras sp. This fauna is assigned 

to a Turonian-Emscherian (Coniacian) age.

A pertinent fauna is found in Venezuela. Gerhardt 

(1897, pp. 70-84) recorded an Upper Cretaceous ammonite fauna from western Venezuela, giving the source of

1
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1947

the material as a blue-black bituminous limestone near 

Rubio, between Cana and Amarillo, State of Tachira. 

The species recorded are: Mortoniceras texanum (Roemer), M. canaen.se Gerhardt, Gauthien'ceras lenti Gerhardt, 0. margae (Schluter), Amaltheus siewrsi Gerhardt, 

and Lenticeras andii Gerhardt. These were assigned 

to the lower Seiionian (Coiiiacian-Santoiiian). Liddle 

(1928, p. 168) assigned Gerhardt's locality to the Colon 

shale, to include the La Luna limestone as that term 

was used by Liddle. He also cited from the lower part 

of the Colon shale at a locality on the road between 

San Cristobal and Cucuta, in the State of Tachira, 

Amaltheus siei^ersi and Lenticeras andii, and from a 

locality on Quebrada La Luna, in the District of Perija, 

State of Zulia, Mortoniceras texanum, Amaltheus sieversi, and Gauthiericeras lenti. At both these localities 

other species also are cited. Liddle (p. 169) says of the 

sequence in the vicinity of Rubio, hence near Gerhardt's 

locality:

To the west and southwest of Rubio there are good sections of 

the Colon shales exposed. Limestone nodules and lentils carry 

a good ammonite fauna. The few thin limestone beds, which 

are intercalated with the shales, are very poorly fossiliferous. 

Most of the ammonites come from a cherty, nodular horizon near 

the base of the shales.

Kehrer (1937, pp. 48-51) describes the La Luna limestone near Colon, Tachira, as including black and gray 

cherts above and dark well-bedded limestone below. 

The overlying Colon shale is said to be dark shale with 

some intercalated limestones. It would seem that 

Gerhardt's locality and Liddle's locality in Tachira are 

in the upper part of the La Luna limestone of present 

usage. Hedberg and Sass (1937, p. 80) refer Liddle's 

locality in Perija also to the La Luna.

The ammonites from Haiti seem to have little in common with those from Jamaica, for the species of Pachydiscus present are not closely related, and there is still 

less in common with the ammonites listed from Puerto 

Rico and Cuba. On the contrary, the fauna reported 

by Gerhardt from southwestern Venezuela appears to 

be closely related. Gerhardt's list includes both a 

Coniacian species, Gauthiericeras margae, and a Santonian species, Mortoniceras texanum. Mortoniceras canaense is most like M. bourgeoisi (D'Orbigny) (Grossouvre, 1894, p. 73), which is assigned to the uppermost 

Coniacian and lower Santonian by Grossouvre. However, Gerhardt did not report Pachydiscus from Venezuela, nor did Liddle, and the Haitian species of 

Pachydiscus seem nearest to, though certainly not identical with, forms that have been referred to a postSantonian age. The La Luna limestone contains at 

some localities, presumably in the lower beds, definitely 

Turonian ammonites (Hedberg and Sass, 1937, p. 80) 

and, presumably at other horizons, Coniacian forms. 

Hedberg and Sass interpret the Foraminifera of the 

Colon shale to suggest equivalence to the Taylor marl

of Texas, that is, Campanian. To the present writer 

it seems most likely that the Haitian ammonites are to 

be placed as approximately Santonian, that is, late 

lower Senonian.

DESCRIPTION OF SPECIES

Genus BACULITES Lamarck 

Baculites sp. indet.

Plate 3, figures 1-6

Three small fragments of an apparently smooth 

species of baculite with broad-ovate cross section and 

simple suture were found. One specimen measures 3.1 

mm. in greatest diameter and 2.8 mm. in least 

diameter; the second is very nearly the same; the third 

is smaller but is much crushed. As these specimens 

are juvenile it is not profitable to make comparisons, 

and they are recorded and illustrated for what they are 

worth.

Figured specimens: U. S. N. M. 104163.

Occurrence: U. S. G. S. 18723.

Genus PAEAPUZOSIA Nowak 

Parapuzosia? sp.

Plate 3, figures 7-10

A single, very young specimen that retains parts of 

the shell differs from all others of similar size in the 

collection.

The shell is compressed. Cross section of whorl oval, 

higher than wide, flanks and venter evenly rounded. 

Umbilicus moderately wide, with low but distinct 

umbilical wall; umbilical shoulder rounded. Measurements in millimeters and percentage of diameter: 

Diameter, 11.7; height of outer whorl, 4.6, 39; thickness 

of outer whorl, 4.1, 35; width of umbilicus, 3.4, 29.

The shell is apparently nearly smooth throughout. 

At a diameter of approximately 7 mm., the internal 

mold shows a clear constriction running from the inner 

part of the flank across the venter, and bending gently 

forward on the venter. There are faint indications of 

two more constrictions on the last whorl, though none 

were conspicuous on the exterior of the shell itfelf.

The suture has the first lateral lobe a little longer 

than the siphonal lobe, with the remaining lobes much 

inclined to the radial line, and the external saddle 

unequally bifid. Suture much dissected.

This specimen would appear to belong to either 

Parapuzosia or Hauericeras. According to Pervinquiere (1907, p. 165) the keel is not present in \roung 

Hauericeras, and young "Puzosia of the gaudama 

group" (Parapuzosia} are very close to young Hauericeras in form, differing, however, in the details of the 

suture. The external saddle of Parapuzosia is bifid, 

the first lateral lobe is much longer than the external
UPPER CRETACEOUS AMMONITES FROM HAITI

lobe, and the outer marginal saddle of the first lateral 

lobe is much higher in position than the inner marginal 

saddle, whereas the external saddle of Hauericeras is 

trifid, the first lateral lobe is but little longer than the 

external lobe, and the outer marginal saddle of the 

first lateral lobe is lower in position than the inner 

marginal saddle. Both are compressed, have a moderately wide umbilicus and show constrictions. The 

present specimen has the required external form and 

sculpture for either Parapuzosia or Hauericeras. The 

•external saddle of the suture is not symmetrically bifid, 

but it does not show the clearly trifid form of Hauericeras, the first lateral lobe is only a little longer than the 

external lobe, and the outer and inner marginal saddles 

of the first lateral lobe are on the same level. Thus the 

suture does not clearly place this from in either Paraimzosia or Hauericeras. The writer assigns it with 

some doubt to Parapuzosia.

Figured specimen: U. S. N. M. 104161.

Occurrence: U. S. G. S. 18723.

Genus PACHYDISCUS zittel 

(Parapachydiscus of many authors)

The writer agrees with Spath (1939) that Grossouvre's 

selection (1894, p. 176) of Ammonites neubergicus Hauer 

as the type of Pachydiscus should be respected and that 

Parapachydiscus Hyatt (1900, p. 570) falls into synonymy. As thus defined, Pachydiscus appears to have 

a compressed to moderately stout shell, with relatively 

small umbilicus, gently rounded umbilical shoulder, 

rounded external margin; surface costate, no constrictions, weak or no umbilical nodes, no ventral nodes; 

costae generally flexuous, including both umbilical and 

intercalated costae; late stages mostly smooth. Suture 

much dissected, crowded, with long, slender elements; 

first lateral lobe the longest, tops of saddles in nearly 

straight line.

Pachydiscus ("Parapachydiscus") gardneri Reeside n. sp.

Plate 1, figures 1, 2, 5-20

Tbis species is represented by half a dozen more or 

less broken specimens ranging in diameter from 25 mm. 

to approximately 115 mm. About 30 juvenile specimens belong at least in part to this species.

Shell at all stages moderately stout; cross section of 

whorl widest about one-third the distance out from the 

umbilicus to the siphonal line, in the early stages proportionately wider than in the later stages; flanks and 

venter evenly rounded. Living chamber and aperture 

not seen. Umbilicus relatively narrow, with definite 

steep umbilical wall and broadly rounded shoulder. 

Measurements of horotype and other specimens, in 

millimeters and percentage of diameter of shell, follow:

Do_-.. — -.. — — ---.-

Do_ _____._-_____-_-____

Diameter 

(millimeters)

79 

i 34 

i 15 

29.5 

26 

9.0 

i 115

Height of 

outer whorl

Millimeters

39 

17 

7.3 

15 

12.7 

4.0 

55

Percent

49 

50 

49 

51 

49 

44 

48

Thickness of 

outer whorl

Millimeters

36 

15

8.2 

15 

13.7 

5.2 

i 51

Percent

46 

44 

55 

51 

53 

58 

44

Width of 

umhil'cus

Millijneters

15 

65 

3.2 

52 

5 

2.0 

19

Percent

19 

19 

21 

18 

19 

22 

16

i Estimated.

The whorls of specimens up to about 15 mm. diameter, assumed to belong to this species, are smooth. 

At about 15 mm. diameter irregularly spaced, rather 

distant, low, threadlike ribs, gently convex orad appear 

on the venter and extend down to the middle of the 

flank. On paratype 1 there appear to be 8 of these ribs 

on the half whorl ending at 29 mm. diameter. On the 

holotype, part of the whorl from about 40 mm. diameter to 79 mm. diameter shows proportionately about 

twice as many ribs per whorl on the venter as does 

paratype 1, with some of them extending farther 

down the flank and showing a gentle sinuosity on the 

flank. The largest specimen, paratype 4, attaining an 

estimated diameter of 115 mm., is much like the holotype but shows nearly twice as many ribs on the venter, 

the last quarter whorl having 15. The innermost 

part of the flank is smooth in all these specimens. On 

internal molds the ribs are only feebly indicated. No 

nodes or constrictions are shown by any of the specimens.

The suture has much the same features throughout 

becoming more dissected with increasing size.

The chief characters of the species are its relative 

stoutness of whorl, with widest part one-third way out 

on flank; smooth inner part of the flank; flexuous but 

weak costae on the outer part of the flank and venter; 

lack of nodes at any stage.

The species most resembles Pachydiscus ootacodensis 

(Stoliczka) (1866, p. 109, pi. 54, figs. 3, 4; pi. 56), particularly as illustrated by Kossmat (1897, p. 98, pi. 16, 

fig. 1; pi. 17, fig. 1). Both have the inner part of the 

flank smooth, umbilicus relatively narrow, whorls relatively stout. At the same diameters, however, P. 

ootacodensis is somewhat stouter, has much more regularity of ribbing, fewer ribs per whorl, and the widest 

part of the whorl nearer the umbilicus.

Types: Holotype, U.S.N.M. 104157; figured paratypes, U.S.N.M. 104169 A-E; unfigured paratyoes, 

U.S.N.M. 104169.

Occurrence: U.S.G.S. locality 18723.

Pachydiscus ("Parapachydiscus") woodringi Reeside n. sp.

Plate 2, figures 1-15

This species is represented by 5 specimens ranging in 

diameter from 25 mm. to_9.0.rum. Some of.the juvenile
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1947

specimens noted under P. gardneri probably belong to 

this species but are not definitely assignable.

Shell moderately stout at all stages; cross section of 

whorl widest about one-fourth the distance out from the 

umbilicus to the siphonal line; early stages stouter than 

the later stages, but not as much so as in P. gardneri; 

flanks and venter evenly rounded. Umbilicus relatively 

narrow, with definite steep umbilical wall and broadly 

rounded shoulder. Measurements of holotype and 

other specimens, in millimeters and percentage of diameter of shell, follow:

Do- — ------------------

Do__-_ — — --------

Do—— — . — ---------

Do. — — .-- — ---- — ---

Do —— ------- --- — —

Diameter 

(millimeters)

90 

69 

39 

25 8 

16.7 

11 

i 31.5 

i 37

Height of 

outer whorl

Millimeters

42 

30 

19 

13.5

8.5 

5.5 

14.5 

18.2

Percent

47 

45 

49 

52 

52 

50 

46 

49

Thickness of 

outer whorl

Millimeters

147 

i 34 

i 21 

1 14.2 

10 

6.2 

15.4 

18.7

Percent

52 

50 

54 

55 

60 

55 

50 

51

Width of 

umbilicus

Millimeters

17.2 

12.3 

7.5 

5.2 

3.1 

2.3 

6.8 

7.1

Percent

19 

18 

19 

20 

19 

20 

21 

19

i Estimated.

The whorls of specimens up to about 10 mm. diameter appear to be smooth. Then there appear on the 

flanks faint radial swellings, and, about 20 mm. diameter, 

these extend across the venter as costae. In all succeeding stages up to 90 mm., the largest available, the 

surface bears somewhat distant, regularly spaced, 

narrow, rounded costae that begin on the umbilical 

shoulder and pass with somewhat flexuous course to 

the venter, where they form a feeble arcuation forward. 

There are from 12 to 14 of these primary ribs per 

whorl. Between each pair are one or more secondary 

ribs that begin somewhere on the flank and cross the 

venter parallel to the primary ribs, most of these 

secondary ribs being weaker than the primary ribs, but 

an occasional one attaining equal prominence. No 

nodes or constrictions on any of the specimens. The 

sculpture is much weaker on internal molds than on the 

shell itself.

The suture has much the same features throughout, 

becoming more dissected with age.

The chief characters of the species are its relative 

stoutness of whorl, with maximum width about onefourth the way out on the flank; the more or less 

flexuous costae, with regularly spaced primary ribs 

extending from the umbilical shoulder over the venter 

and a few secondary ribs intercalated.

The species resembles in sculpture a form figured by 

Schliiter (1872, p. 56, pi. 18, figs. 10, 11) as Ammonites 

cf. A. stobaei Nilsson but differs sharply in its stouter 

whorls. It differs from the associated P achy discus 

gardneri in having umbilical costae and in its somewhat 

stouter whorls.

Types: Holotype, U. S. N. M. 104158; paratypes, 

U. S. N. M. 104159, 104160A-D.

Occurrence: Holotype, U. S. G. S. 18724; paratypes, 

U. S. G. S. 18723. Both in loose boulders.

Genus PARALENTICERAS Hyatt

Whorls compressed, nearly smooth; umbilicus very 

small; venter narrowly rounded; suture with trangular 

first lateral lobe near the middle of the flank and two 

adventitious lobes between the siphonal lobe and the 

first lateral lobe, second lateral lobe small, all moderately incised.

Resembles Spheniscoceras Crick (in Spath, South 

African Mus. Ann., vol. 12, p. 242, 1921) in fc-m, but 

differs in having two adventitious lobes instead of one.

Paralenticeras sieversi (Gerhardt)

Plate 3, figures 13-21

1897. Amaltheus sieversi Gerhardt, Nei:es Jahrb., Beil".go-Band 

11, p. 79, pi. 1, figs. 5a, b.

Shell flat, disk-shaped; very involute, so that only a narrow 

umbilicus remains visible. Flanks gently sowllen, descending 

with gentle curvature to the umbilicus, decorated vith fine, 

falcate, undulating striae that are more distinct on the inner 

third than farther out. External margin intermediate, between 

keeled and rounded. Internal mold smooth.

Shell not preserved on the venter.

Suture line: The saddle within the siphonal lobe has in the 

middle a semicircular secondary saddle; the external saddle is 

broad, consisting of three rather strongly incised branches whose 

anterior ends lie in a curved line such that the innermost branch 

extends farthest forward. The first lateral saddle may also be 

conceived as tripartite and is only half as broad and less incised 

than the external saddle, its base being as broad as high. The 

second lateral saddle consists of two similar parts separated by a 

weak middle notch, each of which parts is again divided by a 

weaker notch. One or two auxiliary saddles follow that lie 

posterior to the second lateral saddle.

The siphonal lobe is unsymmetrical. The first lateral lobe is the 

most extensively developed, extending farthest posteriorly, with 

its base symmetrically tripartite. The second lateral Icbe recalls 

a hand with extended fingers.—Gerhardt, translated.

The Haitian material assigned to this species consists 

of a well-preserved fragment of a larger whorl representing the shell at a diameter of perhaps 100 mm., a 

small individual with maximum diameter of perhaps 

27 mm., and several fragments of the periphery of a 

very large whorl. The characters of these specimens, 

so far as they are shown, agree closely with those indicated by Gerhardt's description and figures of the 

genotype specimen. Minor differences appear in the 

sutures, but they seem of no consequence. Gerhardt's 

specimen as figured is a half whorl with a maximum 

diameter of 59 mm. It does not show the same stages 

as either of the Haitian specimens, but no features 

observable appear to warrant a separation.

Liddle (1928) records the species in several lists from 

localities in western Venezuela, from whicl" region 

Gerhardt's specimen came.

Plesiotypes: U. S. N. M. 104167.

Locality: U. S. G. S. 18723.
Genus TEXANITES Spath

(Mortoniceras of many authors)

Texanites ("Mortoniceras") cf. T. canaensis (Gerhardt)

Plate 3, figi res 24-31

Two small specimens seem clearly referable to 

Texanites and are comparable to such species as T. 

canaensis (Gerhardt) (1897, p. 73) and T. bourgeois! 

(D'Orbigny) (Grossouvre, 1894, p. 73). In this group 

of forms there is in mature stages an umbilical tubercle 

and a pair of ventrolateral tubercles on each rib.

One of the present specimens represents nearly a half 

whorl at a diameter of about 23 mm. and retains most 

of the shell. It is compressed, with the last cross section 

of the whorl 6 mm. wide and 8.5 mm. high, subquadrate 

in outline. The umbilicus is moderately wide, about 

one-third the diameter. The ornamentation consists of 

a rounded median keel and mainly simple ribs, about 32 

per whorl, but with a few ribs per whorl that divide near 

the umbilicus. The ribs are inclined gently forward and 

are gently flexuous. Each rib bears on the umbilical 

shoulder a feeble tubercle and ends on the venter in a 

transverse node separated from the keel by a furrow. 

A second node is feebly developed on the ventrolateral 

shoulder. The suture is simple, with a wide external 

saddle and first lateral lobe as long as the siphonal lobe. 

This specimen recalls that figured by Grossouvre as 

young T. bourgeois! (1894, pi. 14, fig. 4), except that 

it has more ribs per whorl.

A second specimen is much crushed but indicates 

some of the features of a later stage than the first. It 

has a maximum diameter of about 45 mm. On the 

quarter whorl ending at a diameter of 35 mm. there are 

16 ribs corresponding to the 10 umbilical nodes. Both 

ventrolateral nodes appear to be elongated transverse 

to the rib. At 45 mm. the ribs appear to have become 

faint on the flanks, and the nodes are the main sculpture, 

the umbilical nodes having a conical form and the 

ventrolateral nodes being transverse. The suture is not 

observable.

Figured specimens: U. S. N. M. 104166.

Occurrence: U. S. G. S. 18723.

PELECYPODS

Plate 1, figures 3, 4; plate 3, figures 11, 12, 22, 23, 32

Several poorly preserved pelecypods were found in the 

matrix of the ammonites. One (pi. 3, figs. 22, 23) is a 

species of Roudairia from locality 18724, represented 

by a single valve and much like E. intermedia Briiggen 

(1910, p. 756, pi. 26, fig. 2). A second form (pi. 3, fig.

32) is represented by a subtriangular internal mold 

from locality 18723 showing wide, low concentric undulations. It suggests a species of Ostrea more than any 

other genus. A third form (pi. 1, figs. 3, 4; pi. 3, figs. 

11, 12) represented by three specimens from locality 

18723 may be a venerid, but details are lacking on 

which to base a significant assignment. These specimens are figured to complete the record.

Figured specimens: U. S. N. M. 104164, 10^165, 

104162A-C.

REFERENCES

BRUGGEN, HANS, Die Fauna des untereii Serious von Nord-Perii:

Neues Jahrb., Beilage-Band 30, pp. 717-788, 1910. 

GABB, W. M., On the topography and geology of Santo Doiringo:

Am. Philos. Soc. Trans., n. ser., vol. 15, p. 87, 1873. 

CERHARDT, K., Beitrag zur Kenntniss der Kreideformatkm in

Venezuela imd Peru: Neues Jahrb., Beilage-Band 11,

pp. 65-117, 1897. 

GROSSOUVRE, ALBERT de, Recherches sur la craie supereure,

pt. 2, Les ammonites de la craie supericure: Mem.

carte geol. det. France, Paris (dated 1893), 1894. 

HEDBERG, H. D., and SASS, L. C., Synopsis of the geologic

formations of the western part of the Maracaibo lasin,

Venezuela: Bol. geologia y mineria, t. 1, pp. 73-112,

1937. 

HYATT, ALPHEUS, Cephalopoda, in Zittel-Eastman, Textbook of

paleontology, 1st edition, vol. 1, pp. 570, 590, 1900. 

KEHRER, Louis, Some observations on the stratigraphy in tbe

States of Tachira and Merida, S. W. Venezuela: Bol.

geologia y mineria, t. 2, pp. 44-55, 1938. 

KOSSMAT, FRANZ, Ulltersuchungen iiber die siidindische Kreideformatioii, pt. 3: Beitr. Palaontologie Oesterr.-Unparns

u. des Orients, Bd. 11, pp. 89-152, 1897. 

LIDDLE, R. A., The geology of Venezuela and Trinidad, Fort

Worth, 1928. 

MYERHOFF, H. A., The pre-Oligocene stratigraphy of Puerto

Rico: Science, n. ser., vol. 75, pp. 342-343, 1932. 

PERVINQUIERE, LEON, Etudes de paleoiitologie tunisienne, I,

Cepbalopodes des terrains secondaires: Carte g£ol.

Tunisie [mem.], 1907. 

RUTTEN, M. G., Geology of the northern part of the province

Santa Clara, Cuba: Geog. geol. MededeeL, physiogr.-

geol. Reeks, No. 11, Utrecht, 1936. 

SCHLUTER, CLEMENS, Cephalopoden der oberen deutschen Kreide,

Cassel, 1872. 

SPATH, L. P., On Cretaceous Cephalopoda from Zululand*

South African Mus. Annals, vol. 12, pt. 7, pp. 217-321,

1921.

——— On Senonian Ammonoidea from Jamaica: Geol. Mag., 

vol. 62, pp. 28-32, 1925.

——— Problems of ammonite nomenclature. 6. The genus

Pachydiscus Zittel: Geol. Mag., vol. 72, pp. 293-296,

1939. 

STOLICZKA, FERDINAND, The fossil Cephalopoda of the Cretaceous

rocks of southern India, Ammonitidae: PaleontoT ogia

Indica, 1866. 

TRECHMANN, C. T., The basal-complex question in Jamaica:

Geol. Mag., vol. 73, p. 253, 1936.

PLATES 1-3
PLATE 1

[All figures natural size unless otherwise indicated]

FIGUKES 1-2, 5-20. Pachydiscus ("Parapachydiscus") gardneri Reeside, n. sp. (p. 3). Locality 18723.

1, 2. Side and rear views, X3, of a small paratype (No. 3) retaining the shell and probably representing this species; U. S.

N. M. 104169A.

5-7. Side, rear, and front views of paratype 2, an internal mold retaining a little of the shell; U. S. N. M. 10416PB. 

8, 9. Side and rear views, X2, of a small paratype (No. 5) retaining the shell and probably representing this species; U. S.

N. M. 104169C.

10, 11. Side and rear views of paratype 6, an internal mold; U. S. N. M. 104169D. 

12, 13. Restored cross section and side view of largest paratype (No. 4), an internal mold retaining little of the shell; U. S.

N. M. 104169E. 

14-17. Suture, X2, at 53 mm. diameter; side, rear, and front views of the holotype, a specimen retaining part of the shell;

U. S. N. M. 104157.

18-20. Rear, front, and side views of paratype 1, a specimen retaining much of the shell; U. S. N. M. 104169F. 

FIGURES 3, 4. Venerid? peleeypod, locality 18723 (p. 5); lateral and posterior views, X2, of an internal mold; U. S. N. M. 104162A.

8
GEOLOGICAL STJHVEY PEOFESSIONAL PAPER 214 PLATE 1

UPPER CRETACEOUS MOLLUSKS.
GEOLOGICAL SURVEY PROFESSIONAL PAPER 214 PLATE 2

UPPER CRETACEOUS MOLLUSKS.
PLATE 2

[All figures natural size unless otherwise indicated]

FIGURES 1—15. Pachydiscus (" Parapachydiscus") woodringi Reeside, n. sp. (p. 3).

1, 2. Front and side views of a somewhat crushed paratype (No. 4) retaining parts of the shell; U. S. N. M. 104160A.

Locality 18723.

3, 4. Side and rear views of paratype 2, an internal mold retaining parts of the shell; U. S. N. M. 104160B. Locality 18723. 

5-13. Holotype, a specimen retaining much of the shell; U. S. N. M. 104158. Locality 18724. 

5, 6. Front and side views, X2, of innermost whorls.

7. Suture, X 6, at 9 mm. diameter.

8. Suture, X2, at 75 mm. diameter.

9-11. Rear and side views and restored cross section of outer whorl. 

12, 13. Side and rear views of intermediate whorl. 

14, 15. Rear and side views of paratype 1, a specimen retaining the shell; U. S. N. M. 104160D. Locality 18723.

9
PLATE 3

[All figures natural size unless otherwise indicated]

FIGURES 1-6. Baculiles sp. (p. 2); U.S.N.M. 104163. Locality 18723.

1—3. Lateral and antisiphonal views, X3, and suture, X6, of a fragment. 

4-6. Siphonal, lateral, and septal views, X3, of a second fragment. 

FIGURES 7-10. Parapuzosiaf sp. (p. 2); U.S.N.M. 104161. Locality 18723.

Side, front, and rear views, X3, and suture, X10, at a diameter of 75 mm., of an internal mold retaining parts of 

the shell.

FIGURES 11, 12. Venerid? pelecypod (p. 5); U.S.N.M. 104162C. Locality 18723. Anterior and lateral views, X2. 

FIGURES 13-21. Paralenticeras sieversi (Gerhardt) (p. 3); U.S.N.M.104167. Locality 18723.

13-17. Side, rear, and ventral views, restored cross section, and suture, at approximately 100 mm. diameter, of a fragment

of a whorl.

18-21. Two side views and front view, X2, and suture, X5, at 18 mm. diameter, of a small internal mold. 

FIGURES 22-23. Roudairia aff. R. intermedia Briiggen (p. 5); U.S.N.M. 104164. Locality 18724.

Lateral and posterior views, X2. 

FIGURES 24-31. Texnnites ("Mortoniceras") cf. T. canacnsis (Gerhardt) (p. 5); U.S.N.M. 104166. Locality 18723.

24-28. Suture, X6, at 23 mm. diameter; two side views, front view, and ventral view, X2, of a fragmentary specimen

retaining the shell.

29. Fragment of a larger crushed specimen .showing obsolesence of the ribs on the flank. 

30-31. Side and front views of another fragment of the same specimen as figure 29, at a smaller stage and from the opposite

side. 

FIGURE 32. Ostrea? sp. (p. 5); U.S.N.M. 104165. Locality 18723. Lateral view.

10
GEOLOGICAL SURVEY PROFESSIONAL PAPER 214 PLATE 3

UPPER CRETACEOUS MOLLUSKS.
INDEX

Amaltheus sieversi. 

Ammonites neubergicus. 

stobaei------——___

andii, Lenticeras____

Austiniceras dibleyi_____

Baculitcs__________.

Page

2

3

4

2

1

2

sp. indet_________-_._ _ _ ____ _ _ ..... _______________ . ___ 2, pi. 3

Barroisiceras haberfellneri. _ . _ _ _ _ __._ ——— —— ____ __ _______ 1

sp.._ ___ _ _______ _______ ______________ _ _ _______ __ _ __ _ _ 1

bourgeoisi, Mortoniceras

Texanites _ _ .. 

canaense, Mortonicerascanaensis, Texanites_.

__ _ _____ __________ ___ . . ______ _ 2

_ __ ___ _____ ____ __ __. _ _ __ 5

_ ____ _ _ _____ ____ __ __ .... 2

__ _ __ _ _ _ __ _ _ ____ 5

Texanites ("Mortoniceras") __ _____ __ ___ _ ___ _ _ _ _ __ 5, pi. 3

cocchi, Peroniceras. --.____....... _ ....... _ .------....__........._...____. 1

colligatus, Pachydiscus. __ _ _________ . _________ __________ 1

corbarica, Parapuzosia _____ _________ _ _ _____ __ _ _ _ .. 1

Criocerassp.. ___ __ _ _ _ _________ ______________ __ 1

czornigi, Peroniceras__ _ _______ ___ _ __ _ _ __ _ _ __ ___ __ 1

dibleyi, Austiniceras_ _ __ _ _ _._ ___ _______ ____________ 1

Epigoniceras sp _ ——— _ _ __ _ ._ _ _ ._. _ ... ____ _____ _____ 1

gardneri, Pachydiscus- _ _____ ._ _ __ _ _ __ _ _ _ __ _ _ _ _ 4

Pachydiscus ("Parapachydiscus") n. sp __ _____ ____ _ __ _ _ 3, pi- 1

Gauthiericeras lenti __ _ _ _ _ _ _______ _________ __ __ _ 2

margae... _________ _____ ___________ _____ _ ___ _ 2

Glyptoxoceras rugatum _ _ _ _____ ____ _ _ _ __ _____ _ _ _ 1

gollevillensis, Parapachy discus. ..._ ___ _ ____ _______ _ _ _ _ . 3

haberfellneri, Barroisiceras _ __ ___ _ _____ _ _ _______ ____ _ 1

Hauericeras_ __ .. _____ _ _ ___ ____ ____________ . ___ _ __ 2

intermedia, Roudairia.- _____ __ ._ ___________________ _ __ 5

lenti, Gauthiericeras. _ _____ __ __________ _____________ _ 2

Lenticeras andii. .___ _ _____ _ _ __ _____ _ _. ____ .. _______ 2

margae, Gauthiericeras ... _____ ... _ __ . ________ ___ ...... __ 2

Mortoniceras bourgeoisi. _._ _ _____ _ _ __ _______ _ _______ . 2

canaense __ -.--_________ _ ------.----_-_-_____ _ _ ____ _ _____________ 2

texanum _ --------.______________----------------......_.....____-_____-. 2

neubergicus, Ammonites... 

Nowakites paillettei- _.__.. 

ootacodensis, Pachydiscus. 

Ostrea..________-..

———__-____ — -— — _____-_ — _.———_ 3 

______________..___________________ 1

——________ — ——___- — -———— 3

. — — — — — — _——— — ._ ———— 5

Pachydiscus________-________————— — _——————— —— — __ 3-4

colligatus_____________________ ———___ --. ____———— 1

gardneri________------_____-------------------------------------_--——_ 4

ootacodensis-_-_ _------________--_-"---_-____-_------------_---__________ 3

("Parapachydiscus") gardneri n. sp__._____________________ 3, pi. 1

woodringi n. sp---_____----------_______-------,__________________ 3-4, pi. 2

paillettei, Nowakites_-_-________—————_ ——— ———————————— 1

Paralenticeras.---------___-_-_--_---______-------------_____-_-__-----------_ 4

sieversi----____-------______-_. --___.______—__________________________ 4

Parapachydiscus. — _——__———————————————————————————— 3 

gollevillensis___-__._______________________________--------_________ 1

stallauensis.--_____------.____-..._----____--------------__-_________- 1

Parapuzosia--—————— ____ ——— —— — — ——— — — ——— ——— _-__— 2-3

corbarica__-_————_____———————— —. — ———— — — ———— _—— 1

sp_ .______-——_____-——.——_-______ 2-3, pi. 3

Pelecypods. _____________________________________ 5, pis. 1, 3

Peroniceras cocchi__ ____---.._.________-_______-_---....________________ 1

czornigi___ _------____-_-_------______-_-_-----------___-_-_-_--__--_____ 1

tricarinatum___——___._—————— — —— ——— — —— — —— — —— 1

Roudairia intermedia._—_____—__ ———— — _ ——————————— ———— _ 5

rugatum, Glyptoxoceras,___________—— — —— — _._————— —— — __ 1

sieversi, Amaltheus_____________ ——————_._-_-_._——————— 2

Paralenticeras_._——___._-_._————— —————————— ———— — —— 4

Spheniscoceras____——_____-_._———— ————————————— — —— 4

stallauensis, Parapachydiscus____._— ——— ———_._———————— — __ 1

stobaei, Ammonites.____________—__——— — ________—————— 4

Texanites________________—————____._--._—————— 5

hourgcoisi--.-________________. ———— _.________—————— 5

canaensis-____________________————______ — — _ 5

("Mortoniceras") canaensis.._________——__________—— 5, pi. 3

texanum, Mortoniceras__________________—__________———— 2

tricarinatum, Peroniceras________________________—— 1

woodringi, Pachydiscus ("Parapachydiscus") n. sp_____________ 3-4, pi. 2

11

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