The Foraminiferal Fauna 

of the Upper Cretaceous 

Arkadelphia Marl 

of Arkansas

GEOLOGICAL SURVEY PROFESSIONAL PAPER 221-A
The Foraminiferal Fauna 

of the Upper Cretaceous 

Arkadelphia Marl 

of Arkansas

By JOSEPH A. CUSHMAN

GEOLOGICAL SURVEY PROFESSIONAL PAPER 221-A

Illustrations and description of 

Foraminifera from the 

Deaderick Collections in the 

U. S. National Museum

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1949
UNITED STATES DEPARTMENT OF THE INTERIOR 

J. A. Krug, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

For sale by the Superintendent of Documents, U. S. Government Printing Office 

Washington 25, D. C. - Price 40 cents
CONTENTS

Page 

Abstract_ ____________________________________________________________________________________________________ 1

General remarks.______________________________________________________________________________________________ 1

Systematic notes.______________________________________________________________________________________________ 2

Index_________________________^______________________________________________________________________________ 17

ILLUSTRATIONS

Page 

Plates 1-4. Foraminif era from the Arkadelphia marl of Arkansas. __________________________________________________ 11-15

THE FORAMINIFERAL FAUNA OF THE UPPER CRETACEOUS ARKADELPHIA

MARL OF ARKANSAS

By JOSEPH A. CUSHMAN

ABSTRACT

This paper records 116 species and varieties of Foraminifera 

from 11 localities of the Upper Cretaceous Arkadelphia marl of 

Arkansas. Sixty genera are represented. Many of the species 

have not previously been reported from the formation nor have 

specimens from it been figured.

GENERAL REMARKS

In a recent work on the Upper Cretaceous Foraminifera of the Gulf Coastal region of the United States 

and adjacent areas (U. S. Geol. Survey Prof. Paper 

206, 1946) the faunas were described and figured from 

material then available. Since the publication of that 

paper a splendid collection of Foraminifera from the 

Arkansas region was bequeathed to the United States 

National Museum by the late Dr. William H. Deaderick, 

of Hot Springs, Arkansas. Dr. Deaderick had collected 

and studied the Foraminifera in his spare time as an 

interest outside his medical work. In his collections of 

mounted slides and washed material, now in the United 

States National Museum, are numerous excellently preserved Foraminifera from the Arkadelphia marl of 

Navarro age. A study of this material has added 

greatly to the recorded fauna of the Arkadelphia marl 

and extended the range of many known species, and has 

also filled gaps in the recorded faunas of the formations 

of the Navarro group and its equivalents.

References to the literature and descriptions of the 

species will be found in Professional Paper 206. Many 

of the species, however, were not there figured from 

the Arkadelphia marl. Illustrations of these are given 

here to complete the illustration of this fauna.

The earlier localities, those already studied in Professional Paper 206, are given as stations 1 to 4, and the 

new localities, those from the Deaderick Collection, as 

stations 5 to 11. The data for these are as follows:

ARKADELPHIA MARL.

1. Near base. Seven miles north by west of Hope, 

Hempsteacl County, Ark. U.S.G.S. 13411.

833575° i9

2. Small branch east of the Nashville road 4% miles 

(air line) northwest of Hope, Hempstead 

County, Ark. L. W. Stephenson.

3. Branch east of road % mile north by west of 

Reed's store (SW% sec. 29, T. 11 S., R. 24 W.), 

6 miles north by west of Hope, Hempstead 

County, Ark. L. W. Stephenson.

4. Lower part. 4.5 miles east of Washington in 

creek y2 mile north of Reed's store, Hempstead 

County, Ark. U.S.G.S. 8211.

5. Highway 29, between Hope and Blevins, 300 

yards from Reid's (Harris') store, on side road 

to Washington, north side of road, Hempstead 

County, Ark. Collected by W. H. Deaderick, 

Nos. 148, 218, and 334.

6. Highway 4, 5 miles northwest of Hope, 100 yards 

east of airport beacon, Hempstead County, Ark. 

Collected by W. H. Deaderick, Nos. 155, 217, 

and 339.

7. Highway 67, roadside ditch, west side, 5.4 miles 

southwest of Missouri Pacific Railroad station 

in Arkadelphia, Clark County, Ark. Collected 

by W. H. Deaderick, No. 374.

8. Highway 67, roadside ditch, east side, 6.5 miles 

southwest of Missouri Pacific Railroad station 

in Arkadelphia, Clark County, Ark. Collected 

by W. H. Deaderick, No. 379.

9. Highway 67, roadside ditch, west side, 7.3 miles 

south of 10th and Pine Streets, Arkadelphia, 

Clark County, Ark. Collected by W. H. 

Deaderick, No. 315.

10. Highway 67, roadside ditch, east side, 4.7 miles 

south-southwest of railroad station in Arkadelphia, Clark County, Ark. Collected by 

W. H. Deaderick, Nos. 358 and 375.

11. Arkadelphia (?) marl; possibly Nacatoch sand. 

West bank of Ouachita River, 25 yards downstream from Missouri Pacific Railroad bridge 

at Arkadelphia, Clark County, Ark. (Prob1
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1949

ably removed in construction of bridge.) 

Collected by W. H. Deaderick, No. 157.

SYSTEMATIC NOTES

Family SACCAMMINIDAE

Genus PROTEONINA Williamson, 1858

Proteonina difflugiformis (H. B. Brady) Rhumbler

Plate 1, figure 1

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 15, 

1946.)

Bare specimens occurred at station 5. It has not 

previously been recorded from the Arkadelphia marl.

Family REOPHACIDAE

Genus REOFHAX Montfort, 1808

Reophax texanus Cushman and Waters

Plate 1, figure 2

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 16,

1946.)

This species was found at stations 3,4, and 5; common 

at the last locality.

Family AMMODISCIDAE

Genus AMMODISCTJS Reuss, 1861

Ammodiscus cretaceus (Reuss) Cushman

Plate 1, figure 3

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 17,

1946.)

Rare specimens from station 6 make the first record 

from the Arkadelphia marl.

Family LITTJOLIDAE

Genus HAPLOPHRAGMOIDES Cushman, 1910 

Haplophragmoides calcula Cushman and Waters

Plate 1, figure 4

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 19,

1946.)

This species, not previously recorded from the Arkadelphia marl, was common at stations 5 and 6.

Haplophragmoides glabra Cushman and Waters 

Plate 1, figure 5

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 20,

1946.)

This species, not previously recorded from the Arkadelphia marl, was found only at station 7.

Haplophragmoides rugosa Cushman and Waters

Plate 1, figure 6

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 20,

1946.)

Specimens occurred at stations 1, 3, 5, and 8.

Haplophragmoides excavata Cushman and Waters

Plate 1, figure 7

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 21,

1946.)

Specimens occurred at stations 4,5,7, 8, 9, and 10. 

Genus AMMOBACTJLITES Cushman, 1910 

Ammobaculites arenatus Cushman 

Plate 1, figure 8

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 22,

1946.)

This species is known only from the Arkadelphia 

marl, occurring at station 3, the type locality, and 

station 5.

Ammobaculites coprolithiformis (Schwager) Cushman

Plate 1, figure 9

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 22,

1946.)

Specimens occurred at stations 1, 3, and 5.

Ammobaculites texanus Cushman

Plate 1, figure 10

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 23,

1946.)

Numerous typical specimens occur at station 5. This 

is the first record from the Arkadelphia marl. The 

only other record is from the Corsicana marl of Texas.

Family TEXTTJLARIIDAE

Genus SPIROPLECTAMMINA Cushman, 1927

Spiroplectammina semicomplanata (Carsey) Plummer

Plate 1, figure 11

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 28, 

1946.)

This species has been recorded from several formations of the Navarro group but not previously from 

the Arkadelphia marl. Bare specimens occurred at 

station 5.

Family VERNEUILINIDAE

Genus GATJDRYINA d'Orbigny, 1839

Gaudryina navarroana Cushman

Plate 1, figure 14

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 33, 

1946.)

Already recorded from station 2, the species is very 

abundant at station 6 and rare at stations 7 and 10.

Gaudryina deadericki Cushman

Plate 1, figures 12, 13

Gaudryina deadericki Cushman, Cushman Lab. Foramr. Research 

Contr., vol. 23, p. 56, pi. 13, figs. 8-10, 1947.
FORAMINIFERAL FAUNA OF UPPER CRETACEOUS ARKADELPHIA MARL OF ARKANSAS

Test with the very earliest chambers triserial, later 

entirely biserial, much compressed, periphery serrate, 

increasing fairly rapidly in width; chambers distinct, 

increasing rather rapidly but evenly in size as added, 

later ones slightly overlapping; sutures distinct, depressed, nearly straight, strongly oblique; wall finely 

arenaceous, smoothly finished; aperture at the base of 

the inner margin of the last-formed chamber, in the 

early stages a low opening but in the adult extending 

well into the apertural face. Length 0.60-0.85 mm.; 

breadth 0.25-0.40 mm.; thickness 0.12-0.15 mm.

Holotype (U.S.N.M. No. 104238) from the Upper 

Cretaceous, Arkadelphia marl, on Highway 4, 5 miles 

northwest of Hope, 100 yards east of airport beacon, 

Hemp stead County, Ark.

This species is common at the type locality but was 

not noted at the other stations. It differs from 

Gaudryina laevigata Franke in the more numerous 

chambers, more compressed test, deeper sutures, and 

serrate periphery. It was named for Dr. William H. 

Deaderick who collected and mounted the material.

Gaudryina (Siphogaudryina) stephensoni Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 35, pi. 8, figs. 8-11, 1946.)

A single typical specimen from station 8 gives the 

first record of this species from the Arkadelphia marl.

* Genus GATTDRYIWELLA Plummet, 1931 

Gaudryinella pseudoserrata Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 36, pi. 8, figs. 15-21, 1946.)

Specimens occurred at stations 2 and 3.

Gaudryinella pseudoserrata Cushman var. extensa 

Cushman, n. var.

Plate 1, figures 15-17

Variety differing from the typical form in the smaller 

size and much slenderer form with more uniserial chambers in the adult.

Holotype of variety (U.S.N.M. No. 104265) from the 

Upper Cretaceous, Arkadelphia marl, Highway 29, 

north side of road, between Hope and Blevins, 300 yards 

from Keid's (Harris') store, on side road to Washington, Hempstead County, Ark.

This variety is very common at the type locality, 

station 5, and also at station 6.

Genus PSEUD OCLAVTTLINA Cushman, 1936 

Pseudoclavulina arenata (Cushman) Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 37, pi. 9, fig. 9, 1946.)

The species occurs at stations 3, 6, and 8.

Genus CLAVTTLINOIDES Cushman, 1936 

Clavulinoides compressa Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 39, pi. 10, figs. 1-7,1946.)

The only record for the Arkadelphia marl is from 

station 4.

Clavulinoides insignis (Plummer) Cushman

Plate 1, figures 18, 19

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 39, 1946.)

The species occurs at stations 1, 3, 4, and 5.

Family VALVTTLINIDAE

Genus DOROTHIA Plummet, 1931

Dorothia bulletta (Carsey) Plummer

Plate 1, figure 20

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 46, 1946.)

This widely ranging species occurs at stations 1, 3, 4, 

5, and 6.

Genus PLECTINA Marsson, 1878 

Plectina watersi Cushman

Plate 1, figure 21

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 47, 1946.)

The species occurs at stations 1, 3, 5, and 6.

Genus GOESELLA Cushman, 1933 

Goesella rugulosa Cushman

Plate 1, figure 23

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 47, 1946.)

Specimens occur at stations 1, 3, 4, 5, and 6.

Family MILIOLIDAE

Genus QtriNQtTELOCTTLINA d'Orbigny, 1826 

Quinqueloculina antiqua Franke var. angusta Franke

Plate 1, figure 22

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 48, 1946.)

A single specimen from station 11, here figured, is 

not well preserved but seems to be the first record of 

this variety from the Arkadelphia marl.
Family TROCHAMMINIDAE

Genus TROCHAMMINA Parker and Jones, 1859

Trochammina texana Cushman and Waters

Plate 1, figure 24

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 50, 1946.)

This species, confined to formations of the Navarro 

group and its equivalents, has not previously been recorded from the Arkadelphia marl. It occurs at stations 5 and 8.

Trochammina gyroides Cushman and Waters

Plate 1, figure 25

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 50, 1946.)

Specimens occur at stations 1, 3, 5, 9, and 10.

Family LAGENIDAE

Genus ROBULUS Montfort, 1808

Robulus navarroensis (Plummer) Cushman

Plate 1, figure 26

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 51, 1946.)

This species typical of the Navarro group occurs at 

stations 1,2,3,5,6, and 10.

Robulus navarroensis (Plummer) Cushman var. extruatus 

Cushman

Plate 1, figure 27

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 52, 1946.)

Specimens occur at stations 1, 3, 4, 5, and 6.

Robulus spisso-costatus Cushman

Plate 2, figure 1

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 52, 1946.)

Specimens occur at stations 1, 3, 4, 5, and 6.

Robulus pondi Cushman

Plate 2, figures 2, 3

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 52, 1946.)

This species, not previously recorded from the Arkadelphia marl, is common at station 6.

Robulus miinsteri (Roemer) Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 53, pi. 17, figs. 3-9, 1946.)

Specimens from stations 5 and 8 give the first record 

of the occurrence of this species in the Arkadelphia 

marl.

SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1949

Genus LENTICTTLINA Lamarck, 1804

Lenticulina jonesi Sandidge

Plate 2, figure 4

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 55, 1946.)

Numerous specimens from station 5 seem to belong 

to this species, not previously recorded from the Arkadelphia marl. 

Lenticulina cf. rotulata Lamarck

Plate 2, figure 8

Specimens from station 5 may be referred to this 

species with some doubt.

Genus PLANULARIA Defrance, 1824 

Planularia dissona (Plummer) Cushman

Plate 2, figure 5

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 57, 1946.)

There are specimens from stations 1, 3, 4, and 6.

Planularia deadericki Cushman

Plate 2, figures 6, 7

Planularia deadericki Cushman, Cushman Lab. Foram. Research 

Contr., vol. 23, p. 56, pi. 13, figs. 11-13,1947.

Test much compressed, early portion close coiled, 

later tending to uncoil in various degrees, periphery 

carinate with a narrow, transparent keel; chambers 

fairly distinct, little if at all inflated; sutures fairly distinct, curved, little if at all depressed; wall ornamented 

with longitudinal costae, curved, more or less in the 

curve of the dorsal margin of the test; aperture terminal, radiate. Length up to 1.40 mm.; breadth up to 

0.55 mm.; thickness up to 0.25 mm.

Holotype (U.S.N.M. No. 104240) from the Upper 

Cretaceous, Arkadelphia marl, Highway 4, 5 miles 

northwest of Hope, 100 yards east of airport beacon, 

Hempstead County, Ark.

This species in some characters resembles Planularia 

dissona (Plummer) but is usually more compressed and 

has a very highly ornate surface. It is very common at 

the type locality, station 6.

Genus SARACENARIA Defrance, 1824 

Saracenaria saratogana Howe and Wallace

Plate 2, figure 9

(For references, see U. S. Geol. Sun*ey Prof. Paper 206, p. 58,

1946.)

Specimens occur at stations 1, 4, 5, and 6.
FORAMINIFERAL FAUNA OF UPPER CRETACEOUS ARKADELPHIA MARL OF ARKANSAS

Dentalina lorneiana d'Orbigny 

Plate 2, figure 16

Genus MARGINULINA d'Orbigny, 1826 

Marginulina navarroana Cushman

Plate 2, figure 10

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 62,

1946.)

A few specimens from station 6 give the only record 

from the Arkadelphia marl.

Marginulina silicula (Plummer) Cushman

Plate 2, figure 11

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 62,

1946.)

Rare specimens from station 5 give the first record 

from the Arkadelphia marl for this species.

Marginulina plummerae Cushman

Plate 2, figure 12

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 62,

1946.)

Specimens occur at stations 3, 4, and 6.

Marginulina curvatura Cushman

Plate 2, figure 13

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 63,

1946.)

This species is known only from the Corsicana marl 

and the Arkadelphia marl, from the latter at stations 

4 and 5.

Marginulina siliqua Cushman

Plate 2, figure 14

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 63,

1946.)

This species has previously been recorded only from 

the Kemp clay and Corsicana marl. It occurs at stations 5 and 6.

Genus DENTALINA d'Orbigny, 1826 

Dentalina legumen Reuss

Plate 2, figure 15

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 65,

1946.)

Specimens occur at stations 1 and 6.

Dentalina gracilis d'Orbigny

Plate 2, figure 18

(For references, see U. S. Geol. Survey Prof. Paper 296, p. 65,

1946.)

The only records from the Arkadelphia marl are 

from stations 2 and 6.

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 66,

1946.)

Specimens from station 6 give the first record from 

the Arkadelphia marl.

Dentalina basiplanata Cushman

Plate 2, figure 17

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 68, 

1946.)

Specimens -occur at stations 1, 3, 4, 5, and 6.

Dentalina crinita Plummer

Plate 2, figure 19

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 69,

1946.)

There are specimens from stations 1, 3, 4, 5, and 6.

Genus NODOSARIA Lamarck, 1812 

Nodosaria affinis Reuss

Plate 2, figure 20

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 70,

1946.)

Typical specimens occur at stations 1, 3, 4, and 6.

Genus PSEUDOGLANDULINA Cushman, 1929 

Pseudoglandulina manifesta (Reuss) Cushman

Plate 2, figure 21

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 76,

1946.)

Specimens occur at stations 1, 3, 4, and 5.

Pseudoglandulina lagenoides (Olszewski) Cushman and 

Hedberg

Plate 2, figure 22

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 76,

1946.)

The figured specimen from station 6 is the only occurrence of this species in the Arkadelphia marl.

Pseudoglandulina pygmaea (Reuss) Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 76, pi. 27, figs. 27, 28, 1946.)

This species has been recorded previously from 

station 4.
6 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1949

Genus VAGINULINA d'Orbigny, 1826 

Yaginulina multicostata Cushman

Plate 2, figure 24

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 79,

1946.)

Specimens occur at stations 1, 4, 5, and 6.

Vaginulina simondsi Carsey

Plate 3, figure 2

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 80,

1946.)

There are specimens from stations 2, 4, and 6.

Vaginulina cretacea Plummer

Plate 3, figure 1

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 80,

1946.)

There are specimens from stations 1, 2, 3, 5, 6, and 9.

Vaginulina navarroana Cushman

Plate 2, figure 23

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 80,

1946.)

Numerous specimens from station 6 give the first 

record of this species from the Arkadelphia marl.

Vaginulina webbervillensis Carsey

Plate 3, figure 3

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 81,

1946.)

Specimens of this species typical of the Navarro 

group occur at stations 1, 3, 4, 5, and 6.

Genus FALMTJLA Lea, 1833 

Palmula reticulata (Reuss) Cushman

Plate 3, figures 4, 5

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 84, 1946.)

Specimens occur at stations 1, 3, 4, and 5.

Genus FRONDICULAIIIA Defrance, 1826 

Frondicularia lanceola Reuss

Plate 3, figure 6

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 85, 1946.)

A single specimen from station 6 gives the only record from the Arkadelphia marl.

Frondicularia inversa Reuss

Plate 3, figure 7

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 86, 1946.)

Rare specimens occur at station 6.

Frondicularia arkadelphiana Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 91, pi. 37, figs. 21, 22, 1946.)

The only record for this species from the Arkadelphia 

marl is from station 4.

Genus LAGENA Walker and Jacob, 1798 

Lagena hispida Reuss

Plate 3, figure 8

Although recorded from most other formations of 

Navarro age, this species has not previously been recorded from the Arkadelphia marl. It occurs at station 6.

Family POLYMORPHINIDAE

Genus GTJTTULINA d'Orbigny, 1839

Guttulina adhaerens (Olszewski) Cushman and Ozawa

Plate 3, figure 9

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 96, 1946.)

Specimens occur at stations 3,4, and 5.

Genus GLOBULINA d'Orbigny, 1839 

Globulina lacrima Reuss

Plate 3, figure 10

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 96, 1946.)

This species in its typical form has not previously 

been recorded from the Arkadelphia marl. It occurs 

at station 6.

Globulina lacrima Reuss var. subsphaerica (Berthelin) Cushman and Ozawa

Plate 3, figure 11

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 96, 1946.)

Specimens occur at stations 3 and 6.

Globulina lacrima Reuss var. horrida Reuss

(For references and figure, see U. S. Geol. S*urvey Prof. Paper 

206, p. 97, pi. 40, fig. 14, 1946.)

The only record from the Arkadelphia marl is from 

station 1.

Globulina prisca Reuss

Plate 3, figure 12

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 97, 1946.)

This species has not previously been recorded from 

the Arkadelphia marl. It occurs at station 6 where 

fistulose specimens are common.
FORAMIXIFERAL FAUNA OF UPPER CRETACEOUS ARKADELPHIA MARL OF ARKANSAS

Genus PYRULINA d'OrMgny, 1839 

Pyrulina cylindroides (Roemer) Cushman and Ozawa

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 97, pi. 40, figs. 18, 19, 1946.)

Specimens occur at station 3 and questionable ones at 

station 6.

Genus PSEUDOPOLYMORPHINA Cushman and Ozawa, 1928

Pseudopolymorphina cuyleri Plummer

Plate 3, figure 13

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 98, 1946.)

This species occurs at stations 1, 3, 4, 5, and 6, especially abundantly at the last two stations.

Genus BULLOPORA Quenstedt, 1856 

Bullopora laevis (Sollas) Wickenden

Plate 3, figure 19

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 98, 1946.)

This species, not previously recorded from the Arkadelphia marl, occurs at station 6.

Genus RAMULINA Rupert Jones, 1875

Ramulina arkadelphiana Cushman

Plate 3, figures 14, 15

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 99, 1946.)

Specimens occur at stations 1, 3, 4, 5, and 6, abundantly at the last two.

Family NONTONIDAE

Genus NONTONELLA Cushman, 1926

Nonionella robusta Plummer

Plate 3, figures 16,17

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 100, 1946.)

This species, not previously recorded from the Arkadelphia marl, occurs at station 6.

Nonionella ansata Cushman

Plate 3, figure 18

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 101, 1946.)

Previously known only from the Prairie Bluff chalk 

of Navarro age from Alabama, this species occurs in 

considerable numbers in the Arkadelphia marl at station 6.

Family HETEROHELICIDAE

Genus BOLIVTNOPSIS Yakovlev, 1891

Bolivinopsis rosula (Ehrenberg) Macfadyen

Plate 3, figure 20

(For references, see U. S. Geol. Survey , Prof. Paper 206, 

p. 101, 1946.)

A single specimen from station 6 is the first record 

for this species from the Arkadelphia marl.

Genus GTIMBELINA Egger, 1899 

Giimbelina plummerae Loetterle

Plate 3, figures 21, 22

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 104, 1946.)

Numerous specimens from station 6 give the first 

record from the Arkadelphia marl.

Giimbelina striata (Ehrenberg) Egger

Plate 3, figure 24

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 104, 1946.)

Although not previously recorded from the Arkadelphia marl, numerous specimens occur at stations 5 

and 6.

Giimbelina globulosa (Ehrenberg) Egger

Plate 3, figure 23

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 105,

1946.)

Specimens occur at stations 1, 5, 6, and 9.

Giimbelina costulata Cushman

Plate 3, figure 25

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 108,

1946.)

Specimens from station 6 give the first record of this 

species from the Arkadelphia marl.

Giimbelina excolata Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 108, pi. 46, fig. 16, 1946.)

This species has been recorded from station 2.

Genus RECTOGTTMBELINA Cushman, 1932 

Rectogiimbelina cretacea Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 110, pi. 47, figs. 2, 3, 1946.)

This has been recorded from a station that is open 

to question as to whether it is Upper Cretaceous or 

Paleocene.
8

Genus PSEUDOTEXTULARIA Rzehak, 1886 

Pseudotextularia varians Rzehak

Plate 3, figure 26 

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 110,

1946.)

This species has been recorded from the Cretaceous 

of Texas, in the Kemp clay and Corsicana marl.' A 

number of typical specimens were found at station 6 

in the Arkadelphia marl.

Genus PLANOGLOBULINA Cushman, 1927 

Planoglobulina acervulinoides (Egger) Cushman

Plate a, figure 27

(For references, see U. S. Geol. Survey Prof. Paper 206, p. Ill,

1946.)

This species has been recorded from the Prairie Bluff 

chalk of Navarro age from Alabama. The first record 

for the Arkadelphia marl is from station 5.

Genus VENTILABRELLA Cushman, 1928 

Ventilabrella carseyae Plummet

Plate 3, figure 28

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 112,

1946.)

Specimens occur at stations 1, 2, 3, 4, and 6.

Genus BOLIVINITA Cushman, 1927 

Bolivinita costifera Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 115, pi. 49, fig. 3, 1946.)

This has been recorded from a station that may belong 

to the Arkadelphia marl or to the Paleocene series.

Genus PSEUDOTJVIGERINA Cushman, 1927 

Pseudouvigerina seligi (Cushman) Cushman and Todd

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 117, pi. 49, figs. 21-24, 1946.)

This species occurs at,stations 3, 4, and 6.

Genus SIPHOGENERINOIDES Cushman, 1927 

Siphogenerinoides plummeri (Cushman) Cushman

Plate 4, figure 1

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 117,

1946.)

Specimens occur at stations 2 and 6.

Siphogenerinoides brevispinosa Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 119, pi. 50, fig. 12, 1946.)

The only record for this species is from the type 

locality. It is somewhat doubtful whether the locality 

should be placed in the Arkadelphia marl or in the 

Paleocene series.

SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1949

Family BULIMINIDAE

Genus BULIMINELLA Cushman, 1911

Buliminella cushmani Sandidge

Plate 4, figure 2

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 119,

1946.)

This species has been recorded from several formations of the Navarro group but not previously from the 

Arkadelphia marl. Specimens occur at station 6.

Genus BTJLIMINA d'Orbigny, 1826 

Bulimina aspera Cushman and Parker

Plate 4, figure 3

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 121,

1946.)

The species occurs at stations 1, 2, 3, 4, 6, and 10.

Bulimina prolixa Cushman and Parker

Plate 4, figure 4

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 122,

1946.)

Rare specimens from stations 5 and 10 give the first 

record for this species from the Arkadelphia marl.

Bulimina arkadelphiana Cushman and Parker

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 124, pi. 52, figs. 3, 4,1946.)

Specimens occur at stations 1, 3, 4, and 5, and are 

very common at the last station.

Genus VIRGULINA d'Orbigny, 1826 

Virgulina navarroana Cushman

Plate 4, figure 5

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 126,

1946.)

This species has been recorded from numerous localities in the Kemp clay and Corsicana marl of the 

Navarro group. Abundant specimens from station 6 

give the first record from the Arkadelphia marl.

Genus BOLIVINA d'Orbigny, 1839 

Bolivina incrassata Reuss

Plate 4, figure 6

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 127,

1946.)

Although not previously recorded from the Arkadelphia marl, this species occurs very commonly at 

station 5.
FORAMINIFERAL FAUNA OF UPPER CRETACEOUS ARKADELPHIA MARL OF ARKANSAS

Bolivina decurrens (Ehrenberg) Marsson

Plate 4, figure 7

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 127, 1946.)

Bare specimens from station 6 give the first record 

of this species from the Arkadelphia marl.

Genus IOXOSTOMUM Ehrenberg, 1854 

Loxostomum gemmum (Cushman) Cushman

Plate 4, figure 8

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 129, 1946.)

Specimens occur at stations 1, 3, 4, 5, and 10.

Loxostomum plaitum (Carsey) Cushman

Plate 4, figure 9

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 130, 1946.)

Specimens occur at stations 2, 5, and 6.

Family ELLIPSOIDINIDAE

Genus ELLIPSONODOSARIA Silvestri, 1900

Ellipsonodosaria stephensoni Cushman

Plate 4, figure 10

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 134, 1946.)

Specimens occur at stations 1, 3,4, and 5.

Ellipsonodosaria stephensoni Cushman var. speciosa 

Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 135, pi. 56, fig. 8, 1946.)

The types of this variety are from station 3.

Ellipsonodosaria alexanderi Cushman var. impensia Cushman

Plate 4, figure 11

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 136, 1946.)

Specimens occur at stations 1, 4, and 5.

Ellipsonodosaria? granti (Plummer) Cushman

(For references and figures, see U. S. Geol. Survey Prof. Paper 

206, p. 136, pi. 56, figs. 24-26, 1946.)

The only record from the Arkadelphia marl is station 4.

Family ROTALIIDAE

Genus VALVTTLINEBIA Cushman, 1926

Valvulineria cretacea (Carsey) Cushman and Todd

(For references and figure, see U. S. Geol. Survey Prof. Paper 

206, p. 138, pi. 57, fig. 8, 1946.)

The only record from the Arkadelphia marl is station 1.

Genus GYROIDINA d'Orbigny, 1826 

Gyroidina depressa (Alth) Cushman and Church

Plate 4, figures 12, 13

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 139, 1946.)

Although recorded from numerous formations of the 

Navarro group, the first record from the Arkadelphia 

marl of Navarro age is station 6, where it is abundant.

Gyroidina arkadelphiana Cushman

Plate 4, figures 14-16

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 141, 1946.)

Specimens occur at stations 1, 4, 5, and 6.

Genus SIPHONINA Reuss, 1850 

Siphonina prima Plummer

Plate 4, figure 17

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 143, 1946.)

Specimens occur at stations 1 and 5.

Family CASSIDULINIDAE

Genus PULVINTTLINELLA Cushman, 1926

Pulvinulinella glabrata Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 206, 

p. 144, pi. 59, fig. 10, 1946.)

This species has previously been recorded from station 4.

Pulvinulinella navarroana Cushman

(For references and figure, see U. S. Geol. Survey Prof. Paper 206, 

p. 144, pi. 60, fig. 1, 1946.)

This species also has been recorded from station 4.

Family CHIIOSTOMELLIDAE 

Genus ALLOMORPHINA Reuss, 1850 

Allomorphina navarroana Cushman

Plate 4, figure 18

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 145, 1946.)

This species, known previously only from the Kemp 

clay and Corsicana marl, occurs commonly in the Arkadelphia marl at station 6.

Genus PTTLLENIA Parker and Jones, 1862 

Pullenia minuta Cushman

Plate 4, figure 19

(For references, see U. S. Geol. Survey Prot Paper 206, 

p. 147, 1946.)

A very few specimens from stations 5 and 10 make 

the first record of this species from the Arkadelphia 

marl.
10

Family GLOBOROTAXIIDAE

Genus GLOBOTRUNCANA Cushman, 1927

Globotruncana canaliculata (Reuss) Cushman

Plate 4, figures 20, 21

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 149, 1946.)

Specimens from station 6 give the first record from 

the Arkadelphia marl.

Globotruncana area (Cushman) Cushman

Plate 4, figures 22, 23

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 150, 1946.)

Specimens occur at stations 5 and 6, giving the first 

record of this species from the Arkadelphia marl.

Globotruncana cretacea Cushman

Plate 4, figures 24, 25

(For references, see U. S. Geol. Survey Prof. Paper 206, 

p. 151, 1946.)

This is a widely ranging species but not previously 

recorded from the Arkadelphia marl. It occurs at station 6.

Genus GLOBOROTALIA Cushman, 1927 

Globorotalia membranacea (Ehrenberg) White

(For references and figure, see U. S. Geol. Survey Prof. Paper 206, 

p. 152, pi. 63, fig. 5, 1946.)

A single specimen from station 9 gives the first record for this species from the Arkadelphia marl.

Family ANOMALINIDAE

Genus ANOMALINA d'Orbigny, 1826

Anomalina nelsoni W. Berry

Plate 4, figure 26

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 154,

1946.)

Specimens occur at stations 4 and 5.

Anomalina pseudopapillosa Carsey

Plate 4, figures 27, 28

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 154,

1946.)

Specimens occur at stations 1, 2, 3, 4, 5, 6, and 10.

SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1949

Anomalina pinguis Jennings

Plate 43 figures 29, 30

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 156,

1946.)

Specimens from station 6 give the first record of this 

species from the Arkadelphia marl.

Genus PLANULINA d'Orbigny, 1826 

Planulina correcta (Carsey) Cushman

Plate 4, figures 31, 32

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 158,

1946.)

Specimens of this typically Navarro species occur 

at stations 1, 2, 3, 4, and 6.

Genus CIBICIDES Montfort, 1808 

Cibicides harperi (Sandidge) Cushman

Plate 4, figures 33, 34

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 159,

1946.)

Specimens from stations 5, 6, and 8 give the first 

record from the Arkadelphia marl of this typically 

Navarro species.

Cibicides subcarinatus Cushman and Deaderick

Plate 4, figures 35, 36

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 159,

1946.)

This species, occurring commonly at station 5 and 

rarely at station 9, gives the first record from the 

Arkadelphia marl.

Cibicides beaumontianus (d'Orbigny) Brotzen

Plate 4, figures 37, 38

(For references, see U. S. Geol. Survey Prof. Paper 206, p. 160,

1946.)

Specimens are common at station 6, giving the first 

record from the Arkadelphia marl.


PLATES 1-4
PLATE 1

Figure 1. Proleonina difflugiformis (H. B. Brady) Rhumbler. Station 5. X 35.

2. Reophax texanus Cushman and Waters. Station 5. X 35.

3. Ammodiscus cretaceus (Reuss) Cushman. Station 6. X 35.

4. Haplophragmoides calcula Cushman and Waters. Station 5. X 35.

5. Haplophragmoides glabra Cushman and Waters. Station 7. X 35.

6. Haplophragmoides rugosa Cushman and Waters. Station 5. X 35.

7. Haplophragmoides excavata Cushman and Waters. Station 7. X 35.

8. Ammobaculites arenatus Cushman. Station 5. X 35.

9. Ammobaculites coprolithjformis (Schwager) Cushman. Station 5. X 35.

10. Ammobaculites texanus Cushman. Station 5. X 35.

11. Spiroplectammina semicomplanata (Carsey) Plummer. Station 5. X 35.

12. 13. Gaudryina deadericki Cushman. Station 6. X 35.

14. Gaudryina navarroana Cushman. Station 6. X 35.

15-17. Gaudryinella pseudoserrata Cushman var. extensa Cushman, n. var. Station 5. X 35. 15, Holotype. 16, 17, Paratypes.

18, 19. Clavulinoides insignis (Plummer) Cushman. Station 5. X 35. 18, Microspheric form. 19, Megalospheric form.

20. Dorothia bulletta (Carsey) Plummer. Station 6. X 35.

21. Plectina ivatersi Cushman. Station 5. X 35.

22. Quinqueloculina antiqua Franke var. angusta Franke. Station 11. X 35.

23. Goesella rugulosa Cushman. Station 6. X 35.

24. Trochammina texana Cushman and Waters. Station 5. X 35.

25. Trochammina gyroides Cushman and Waters. Station 5. X 35.

26. Robulus navarroensis (Plummer) Cushman. Station 6. X 35.

27. Robulus navarroensis (Plummer) Cushman var. extruatus Cushman. Station 6. X 35.
GEOLOGICAL SI HVEY PROFESSIONAL PAPER 221 PI.\TE I

FORAMINIFERA FROM THE ARKADELPHIA MARL OF ARKANSAS
PLATE 2

Figure 1. Robulus spisso-costatus Cushman. Station 6. X 35. 

2, 3. Robulus pondi Cushman. Station 6. X 35.

4. Lenticulina jonesi Sandidge. Station 5. X 35.

5. Planularia dissona (Plummer) Cushman. Station 6. X 35.

6. 7. Planularia deadericki Cushman. Station 6. X 35.

8. Lenticulina cf. rotulata Lamarck. Station 5. X 35.

9. Saracenaria saratogana Howe and Wallace. Station 5. X 35.

10. Marginulina navarroana Cushman. Station 6. X 35.

11. Marginulina silicula (Plummer) Cushman. Station 5. X 20.

12. Marginulina plummerae Cushman. Station 6. X 35.

13. Marginulina curvatura Cushman. Station 5. X 35.

14. Marginulina siliqua Cushman. Station 6. X 35.

15. Dentalina legumen Reuss. Station 6. X 35.

16. Dentalina lorneiana d'Orbigny. Station 6. X 35.

17. Dentalina basiplanata Cushman. Station 5. X 35.

18. Dentalina gracilis d'Orbigny. Station 6. X 35.

19. Dentalina crinita Plummer. Station 6. X 20.

20. Nodosaria affinis Reuss. Station 6. X 35.

21. Pseudoglandulina manifesta (Reuss) Cushman. Station 5. X 35.

22. Pseudoglandulina lagenoides (Olszewski) Cushman and Hedberg. Station 6. X 35.

23. Vaginulina navarroana Cushman. Station 6. X 35.

24. Vaginulina multicostata Cushman. Station 5. X 35.
GEOLOGICAL SURVEY PROFESSIONAL PAPER 221 PLATE 2

FORAMINIFERA FROM THE ARKADELPHIA MARL OF ARKANSAS
PLATE 3

Figure 1. Vaginulina cretacea Plummer. Station 6. X 20.

2. Vaginulina simondsi Carsey. Station 6. X 20.

3. Vaginulina webbervillensis Carsey. Station 5. X 20.

4. 5. Palmula reticulata (Reuss) Cushinan. Station 5. X 35.

6. Frondicularia lanceola Reuss. Station 6. X 35.

7. Frondicularia inversa Ruess. Station 6. X 20. 

,8. Lagena hispida Reuss. Station 6. X 35.

9. Guttulina adhaerens (Olszewski) Cushman and Ozawa. Station 5. X 35.

10. Globulina lacrima Reuss. Station 6. X 35.

11. Globulina lacrima Reuss var. subsphaerica (Berthelin) Cushman and Ozawa. Station 6. X 35.

12. Globulina prisca Reuss. Station 6. X 35.

13. Pseudopolymorphina cuyleri Plummer. Station 6. X 20.

14. 15. Ramulina arkadelphtana Cushman. Station 5. X 35. 

16, 17. Nonionella robusta Plummer. Station 6. X 35.

18. Nonionella ansata Cashman. Station 6. X 35.

19. fhillopora laevis (Sollas) Wickenden. Station 6. X 35.

20. Bolivinopsis rosula (Ehrenberg) Macfadyen. Station 6. X 35.

21. 22. Gumbelina plummerae Loetterle. Station 6. X 35. 21, Side view; 22, Apertural view.

23. Gumbelina globulosa (Ehrenberg) Egger Station 6. X 35.

24. Gumbelina striata (Ehrenberg) Egger. Station 6. X 35.

25. Gumbelina costulata Cushman. Station 6. X 35.

26. Pseudotextularia varians Rzehak. Station 6. X 35.

27. Planoglobulina acervulinoides (Egger) Cushman. Station 5. X 35.

28. Ventilabrella carseyae Plummer. Station 6. X 35.
GEOLOGICAL SURVEY PROFESSIONAL PAPER 221 PLATE 3

FORAMINIFERA FROM THE ARKADELPHIA MARL OF ARKANSAS
PLATE 4

Figure 1. Siphogenerinoides plummeri (Cushman) Cushman. Station 6. X 45.

2. Buliminella cushmani Sandidge. Station 6. X 45.

3. Bulimina aspera Cushman and Parker. Station 6. X 45.

4. Bulimina prolixa Cushman and Parker. Station 5. X 45.

5. Virgulina navarroana Cushman. Station 6. X 45.

6. Bolivina incrassata Reuss. Station 5. X 45.

7. Bolivina decurrens (Ehrenberg) Marsson. Station 6. X 45.

8. Loxostomum gemmum (Cushman) Cushman. Station 5. X 45.

9. Loxostomum plaitum (Carsey) Cushman. Station 6. X 45.

10. Ellipsonodosaria stephensoni Cushman. Station 5. X 45.

11. Ellipsonodosaria alexanderi Cushman var. impensia Cushman. Station 5. X 45.

12. 13. Gyroidina depressa (Alth) Cushman and Church. Station 6. X 45. 12, Dorsal view. 13, Ventral view. 

14-16. Gyroidina arkadelphiana Cushman. Station 5. X 45. 14, Peripheral view. 15, Dorsal view. 16, Ventral view.

17. Siphonina prima Plummer. Station 5. X 45.

18. Allomorphina navarroana Cushman. Station 6. X 45.

19. Pullenia minuta Cushman. Station 5. X 45.

20. 21. Globotruncana canaliculata (Reuss) Cushman. Station 6. X 35. 20, Ventral view. 21, Dorsal view. 

22, 23. Globotruncana area (Cushman) Cushman. Station 6. X 35. 22, Ventral view. 23, Dorsal view. 

24, 25. Globotruncana cretacea Cushman. Station 6. X 35. 24, Ventral view. 25, Dorsal view.

26. Anomalina nelsoni W. Berry. Station 5. X 45. ,

27. 28. Anomalina pseudopapillosa Carsey. Station 5. X 45. 27, Ventral view. 28, Dorsal view.

29, 30. Anomalina pinguis Jennings. Station 6. X 35. 29, Ventral view. 30, Dorsal view.

31, 32. Planulina correcta (Carsey) Cushman. Station 6. 31, Dorsal view. 32, Ventral view.

33, 34. Cibicides harperi (Sandidge) Cushman. Station 6. X 35. 33, Ventral view. 34, Dorsal view.

35, 36. Cibicides subcarinatus Cushman and Deaderick. Station 5. 35, Dorsal view. 36, Ventral view.

37, 38. Cibicides beaumontianus (d'Orbigny) Brotzen. Station 6. 37, Dorsal view. 38, Ventral view.
GEOLOGICAL SURVEY PROFESSIONAL PAPEE 221 PLATE *

FORAMINIFERA FROM THE ARKADELPHIA MARL OF ARKANSAS

INDEX

A Page 

acervulinoides, Planoglobulina... ___--------_____._____..._.... 8, pi. 3

adhaerens, Guttulina.........._......_____._____.___........ 6, pi. 3

affinis, Nodosari........._.....___..___________________ 5, pi. 2

alexanderi impensia, Ellipsonodosaria...... ___ __ _ ____ ________. 9

Allomorphina.....____.............___________________ 9

navarroana.... .-.____----------___...--__._...._______ 9, pi. 4

Ammobaculites.............._.-__.______________...___ 2

arenatus....--..._____.._.____________....___.. 2, pi. 1

coprolithiformis................ ._._________________ 2, pi. 1

texanus....... .. __...____________________ 2, pi. 1

Ammodiscus.... ____-...___.-..__________________ 2

cretaceus.... ._------__-_.__.____________._____... 2, pi. 1

angusta, Quinqueloculina antiqua........... .-.._.----___...__..._...__._... 3, pi. 1

Anomalina.............--__--..._______.___...______.... 10

ndsoni.............................__.......__....________ 10

pinguis .... -..._. ._.......________.. 10, pi. 4

pseudopapillosa ....................................................... 10, pi. 4

ansata, Nonionetta........... __..._..-.._...______._.......... 7, pi. 3

antigua angusta, Quingueloculina............................................ 3, pi. 1

area, Olobotruncana ...............................................__._ 10, pi. 4

arenata, Pseudoclavulina..........................................__...__._ 3

arenatus, Ammobaculites ..........................________....._ 2, pi. 1

Arkadelphia marl, collection localities in Arkansas_____ _ _. __ __ _ 1-2 

arkaddphiana, Bulimina ..................................................... 8

Frondicularia ..... . ..__.______._. 6

Oyroidina.........................................--...-.-.....___.. 9, pi. 4

Ramulina....-.......................................................... 7, pi. 3

Arkansas, Foraminifera collections from the Arkadelphia marl..____._. 1-2 

aspera, Bulimina......._________________-....______ 8, pi. 4

B 

basiplanata, Dentalina...................................................... 5, pi. 2

beaumontianus, Cibicides .................................................. 10, pi. 4

Bolivina ................................................................... 8-9

decurrens............................................................... 9, pi. 4

incrassata............................................................... 8, pi. 4

Bolivinita..................................................................... 8

costifera................................................................... 8

Bolivinopsis................................................................... 7

rosula................................................................... 7, pi. 3

brevispinosa, Siphogeneroides.................................................. 8

Bulimina-.................................................................... 8

arkaddphiana.....................................___________._ 8

aspera ................................................................ 8, pi. 4

proltaa............... .................................................. 8, pi. 4

Bulimindla....................................................____.__.. 8

cushmani..............---....-.-....................................... 8, pi. 4

bulletta, Dorothia................................... ........__......____ 3, pi. 1

Bullopora.........................--.....--................................... 7

lams...............................................__.__._____ 7, pi. 3

calcula, Haplophragmoides--............ .-..--._........_.......___. 2, pi. 1

canaliculata, Olobotruncana............................... ..........__... 10, pi. 4

carseyae, Ventttabrdla....................................................... 8, pi. 3

Cibicides...................................................................... 10

beaumontianus........................................................_ 10, pi. 4

harperi............................. . . .. .._.___ 10, pi. 4

subcarinatus........................................................... 10, pi. 4

Clavulinoides.................................................................. 3

compressa.............________....__._._______.___.... 3

insignis................................................................. 3, pi. 1

compressa, Clavulinoides.............................___________._ 3

coprolithiformis, Ammobaculites............ ______.__-------__---... 2, pi. 1

correcta, Planulina......................................................... 10, pi. 4

coslifera, Bolivinita............................................................. 8

costulata, Oumbelina.......-. ----......................................... 7, pi. 3

cretacea, Globotruncana..................................................... 10, pi. 4

Rectogumbdina........................................................... 7

Vagmulina.........................'.................................... 6, pi. 3

Valvulinena-------------................................................. 9

cretaceus, Ammodiscus...................................................... 2, pi. 1

crinita, Dentalina........................................................... 5, pi. 2

Page 

curvatura, Marginulina...................................... ... . -... 5, pi. 2

cushmani, Bulimindla................................... ...... .-_-_.--. 8, pi. 4

cuyleri, Pseudopolymorphina-.-----------.... ...--_---.. .-.-----..--- 7, pi. 3

cylindroides, Pyrulina..... . ._..____ . 7

D 

Deaderick, Dr. William H., collections....._ ..-.. . 1

deadericki, Qaudryina.......................................-.............. 2-3, pi. 1

Planularia..............................................__-___---- 4, pi. 2

decurrens, Bolivina-..-............................................... 9, pi. 4

Dentalina...................................... ............... 5

basiplanata.............................................................. 5, pi. 2

crinita..................... ..............____. .___.___ 5, pi. 2

gracUis.............................................................. . 5, pi. 2

legumen.............................. ............ .... 5, pi. 2

lorneiana................------------ ..... --.-. 5, pi. 2

depressa, Oyroidina.................................................. 9, pi. 4

diffiugiformis, Proteonina.................................................... 2, pi. 1

dissona, Planularia...-................................ -__--. 4, pi. 2

Dorothia . ___________.__. .. _.----.. .. _ 3

buttdta.-. .. - - -- - - - 3, pi. 1

E 

Ellipsonodosaria ............. ---__-_ ._-._._ .. ... 9

alexanderi impensia...................................................... 9, pi. 4

stephensoni....... ...- ---..-... . 9, pi. 4

...... . -.- -- - - -- 2, pi. 1

excavata, Haplophragmoides ........ ... ........ ............. ... .... ... ... .... . 2, pi. 1

excolata, Oumbdina........ ... ...... . ... . ... ... ..... ...... ..... ... 7

extensa, Qaudryinella pseudoserrata..... ...... ... .... ... .... .. . ........ .... 3, pi. 1

extruatus, JRobulus navarroensis . .......... ... ......................... .... . 4, pi. 1

r

Frondicularia............ __-.-----__ . .... 6

arkadelphiana -. --- - 6 

inversa.. ... ..-- -- ---- -- 6, pi. 3 

lanceola.... ------------------- - -- --- 6, pi. 3

G 

Gaudryina......... -...---------------------------------------------------- 2-3

deadericki... - 2, pi. 1

laevigata.... . -.--._ -- ---- - - 3

navarroana................................. ... ------- .- 2, pi. 1

(Siphogaudryina) stephensoni....... - .... 3

Gaudryinetta.................--------------- ... - - . . 3

pseudoserrata....-...-.. . ... . .._._ ...... 3

pseudoserrata extensa.................................................... 3, pi. 1

gemmum, Loxostomum........................................... ...-.-_.--. 9, pi. 4

glabra, Haplophragmoides..................... ... .--- 2, pi. 1

glabrata, Pulvinulindla........................................................ 9

Oloborotalia........................................................ 10

membranacea............................................................. 10

Globotruncana----.....-.........................-... 10

area.................................................................... 10, pi. 4

canaliculata-.......................... .. -- - 10, pi. 4

cretacea..............------------------...-........................... 10, pi. 4

Globulina..............................--..................................... 6

lacrima........ 6, pi. 3

lacrima horrida............................................................ 6

lacrima subsphaerica...................... 6, pi. 3

prisca..-- - 6, pi. 3

globulosa, Gumbelina.............. 7, pi. 3

Goesdla_________-______.______-___ 3 

rugulosa................................ ... . 3, pi. 1

gracilis, Dentalina.........................- ... -- - 5, pi. 2

granti, Ellipsonodosariaf................. ................................... 9

Oumbelina........................-...--------...............-..... 7

costulata---......................-_____-___ ----- 7, pi. 3

excolata.....--.......................-............... ------.. ......... 7

globulosa.-......................... 7, pi. 3

plummerae........................ -- 7, pi. 3

.. - 7, pi. 3

17
18 INDEX

Page 

Quttulina..................................................................... 6

adhaerens..--- _._.__...___________---_____-- 6, pi. 3

gyroides, Trochammina-.--- ________________________. 4, pi. 1

Gyroidina--------------------___..----.---____-----_----_________--_ 9

arkadelphiana.-- _____-__________......_.__........... 9, pi. 4

-- - - -- --_ __ __.- 9, pi. 4

H 

Haplophragmoides..- ------------------------------------------------------- 2

calcula.---------.-- - _.----. --___--.- ,______. 2, pi. 1

excavata__ ___ _.- .---.____----..___..... 2, pi. 1

gla'labra.-------------_...____.------._...___________... 2, pi. 1

rugosa- ----------------------- ______ 2, pi. 1

harperi, Cibiddes-... __--___- -_-_-.__.----- _____._. ._.._.._.. 10, pi. 4

hispida, Lagena,----- _-_..__-------___-...__---------_.._.._. 6, pi. 3

horrida, Globulina lacrima-- __--_._______-..._--.-.__._.. 6

impensia, Ellipsonodosaria alexanderi----------.-----... ..-----...._..._....... 9

incrassata, Bolivina----.----.----------------- --------__ __--.._._.-__._.- 8, pi. 4

insignis, Clavulinoides.- _____._._.__.________._...____ 3, pi. 1

inversa, Frondicularia -------------------.------ ------------------------- 6, pi. 3

jonesi, Lenticulina_ __ ... --------- _____.. 4, pi. 2

lacrima, Globulina ------_______.___ ________-_------ 6, pl. 3

lacrima horrida, Globulina------ - - ._-. -____ 6, pl. 3

lacrima subsphaerica, Globulina- ..__ --_-__ ._--._..- 6, pl. 3 

laevigata, Oaudryina.-.... ____._..-_---- -____.__..-________ 3

laevis, Bullopora....--------------------------------------------------------- 7, pl. 3

Lagena____-__-_--------- .-. - - -------____ 6

 ._-__ -- - _- --- ------- ............. 6, pl. 3

lagenoides, Pseudoglandulina...... .---.__--------________---__...-_ 5, pl. 2

lanceola, Frondicularia--..--________- ---------_.....__.__ 6, pl. 3

legumen, Dentalina -------------------------------------------------------- 5, pl. 2

Lenticulina.... _-.-. __ ..- . - . --------___ 4

jonesi- -. -- - - .- - ---. - - 4, pl. 2

rotulata---------- _______------------ -------_.---....-....__. 4, pl. 2

lorneiana, Dentalina______________-----_-__---_..___... 5, pl. 2 

Loxostomum--------------- ----------------------------------------------- 9

gemmum--------------------------------------------------------.------- 9, pl. 4

plaitum.-- -- ----- .. -- -- ----------------------------------- 9, pl. 4

M 

manifesto, Pseudoglandulina_________________________. ______. 5, pl. 2

Marginulina---------------- _--------_----- ._-__-._-.__-___._ 5

curvatura. ------------------------------------------------------------- 5, pl. 2

navarroana---------------- --- - -- -- 5, pl. 2

plummerae.--- ____.._------------- ----- -------_____ 5, pl. 2

silicula--------------------------------------...--------------------- 5, pl. 2

siliqua.------__------__._-_--__-------____--____.-. 5, pl. 2

membranacea, Globorotalia___-__--___---------_______._-_____ 10

minuta, Pullenia----- - ----------------------------------------------------- 9, pl. 4

muUicostata, Vaginulina__-._____--------_____---_-----__ 6, pl. 2

munsteri, Robulus--.-.--. -_---_--_--.-.-_------.--_-.-.--_-----.-..-.-.-.-.- 4, pl. 2

N 

navarroana, Allomorphina--------------------------------------------------- 9, pl. 4

Gaudryina------------- - - --------- - _--. .-- 2, pl. 1

Marginulina.--- ,--. ._-. ---- .--_ 5, pl. 2

Pulvinulinella...-----__ - ----- ------- 9

Vaginulina__-----_.... -------- ---_--_-------__ --.. 6, pl. 2

Virgulina--. _--____.--------_-______--_-___---------___....... 8

navarroensis, Robulus__--__-__-------_----------.----------_--_------------ 4, pl. 1

navarroensis extruatus, ffobulus------------.-------.------------------------- 4, pl. 1

nelsoni, Anomalina-------...---- ___----. -_.-. - --.- ---- 10

Nodosaria______-__-_____-._.._.-_-_---._-__-- -.-.___--._ . 5

affinis.--.-.---. -..-- -----------.----------..--- -----.-.----- --- 5, pl. 2

Nonionella,- -- _____-__________._-_--.____. ..__...__-. 7

ansata _-____-__________.-_._---____-_____.-._._. 7, pl. 3

robusta----- . -.- ----- ------.-.--.------.--- --.---.. -- 7, pl. 3

Palmula.-..._..__..-_-.___.__.-----__----_-----------------.--------..-_... 6

reticulata-----. -...._.-- .-.----- --._.. ......-.-- -.- 6, pl. 3

pinguis, Anomalina__.______._.._______......_____.. 10, pl. 4

plaitum, Loxostomum------------------------------------------------------- 9, pl. 4

Page 

Planoglobulina. ____________________________________., 8

acervulinoides....... _.._.___.___._-.-.--___-______ 8, pl. 3

Planularia-....-.______.___-_._-___..._________..... 4

deadericki... ____________.___..______________ 4, pl. 2

dissona ______--------__.-_-.-------------.------------.__... 4, pl. 2

Planulina__.__.__._____.. __------ --__- _-___. 10

correcta...................-__________-_----__--____--- 10, pl. 4

Plectina.--.___________________-__-____-___.... 3

watersi.------------ --------------..-. -----------------_--..._... 3, pl. 1

plummerae, Gumbelina---------__ __ . .._.. 7, pl. 3

Marginulina--------_______-..___-.- -----__-.-.___ 5, pl. 2

plummeri, Siphogenerinoides____________---_______---- 8, pl. 4

pondi, Robulus___. ...... _.. ..-._.. 4, pl. 2

prima, Siphonina.....-_______ _____ _________ 9, pl. 4

prisca, Globulina--- ______--.-._____.._____________ 6, pl. 3

prolixa, Bulimina-.-.- _______..____________________.. 8, pl. 4

Proteonina__-....____...__.-----..__ . ......__. 2

difflugiformis-- ______-...__-----_-----------___------___ 2, pl. 1

Pseudoclavulina....______.___-___-___.___--_-__.... 3

arenata.------------------------------------------------------------------ 3

Pseudoglandulina--------...-_-----.----------------------------------__-_____ 5

lagenoides--, ___.. .____._ --------- .. . _...... 5, pl. 2

manifesto_____.-___.-__----_-_----- --____.___ 5, pl. 2

pygmaea---.--.- ... - _ --- --------- 5, pl. 2

pseudopapillosa, Anomalina-- ___-_-_.-_---------_._______ 10, pl. 4

Pseudopolymorphina -_-. . -. - -------__ 7

cuyleri--.............------_--------_.___-----._.__....__... 7, pl. 3

pseudoserrata, Gaudryinella.... .____...._-____----______._____ 3

pseudoserrata extensa, Gaudryinella__----._.---_-----_.----_-_-.----....... 3, pl. 1

Pseudotext,ularia-------------_. -- - -.. -- .-.-.__-- 8

varians----....___-_-_._- -._-_.-_- _____-_--_._ 8, pl. 3 

Pseudouvigerina ------------------------------------------------------------- 8

seligi_----------- ------- ------ -_-- _ -_-__--_--- 8

Pullenia--- ________----------- -_-- - -.__... 9

minuta-_____.__-___- ----___ ----__--_-_ ______._ 9, pl. 4

Pulvinulinella---- ________----------__-_--------_...-_-_._-_-_- 9

glabrata-------------------- ---- -- - --. 9

navarroana____-.-_ . - ------- _-___----- 9

pygmiea, Pseudoglandulina. - _-- -.-. -- ------- 5, pl. 2

Pyrulina--.-- - - - - - - --- 7

cylindroides---- --. - - - - 7

Q

QwmgweZocwftno------------------------------------------------------------- 3

antigua angusta__________ ___------____ ___- 3, pl. 1

K 

Ramulina__--_. - . __--.. .. - ------ 7

arkadelphiana--.- ---------------- -- --------. 7, pl. 3

Rectogumbelina..... _------------- .--.-_. --_... __- - 7

cretacea- - -- ---- - - -- -- 7

Reophax--- ------ . ----- - --.. 2

texanus....... -------- --_-_.-_.-_____-----..... 2, pl. 1

reticulata, Palmula__ --__ - --.-.. .. 6, pl. 3 

Robulus.---------------------.----------------------------------------------- 4

munsteri--------- _ ---- --------- ------- __-_- 4, pl. 2

navarroensis.- _-__ -__---. --___ -----------. - -- 4, pl. 1

navarroensis extruatus-- -_. .---_. - --------. _-.-_ 4, pl. 1

pondi---------------------------------------.-.-----------..-----------. 4, pl. 2

spisso-costatus.-- ________-____-------___-----------_-----------_-___--- 4, pl. 2

robusta, Nonionella.- ____.__----- ---- ----------- -------------- 7, pl. 3

rosula, Bolivinopsis------...------------------------------------------------ 7, pl. 3

rotulata, Lenticulina---- ------------------- ---- --- 4, pl. 2

rugosa, Haplophragmoides---....... --- . - - .-- -- . 2, pl. 1

rugulosa, Goesella... - --- - 3, pl. 1

Saracenmii- - ----- - 4

saratogana.______--------------- - - ---- 4, pl. 2

saratogana, Saracenaria..----.----------------------------------------------- 4, pl. 2

seligi, Pseudouvigerina__---.---.--------- ..---------_------------.--_----. 8

semicomplanata, Spiroplectammina---.-... .. ------- -... .... 2, pl. 1

silicula, Marginulina-- ... ... - ------------- _ ------ ----- 5, pl. 2

siliqua, Marginulina........ . ------ ----- ...... .... 5, pl. 2

simondsi, Vaginulina-- ----- -.--.._ ..... .. . 6, pl. 3

Siphogenerinoides--_ -------- _-_--__-- . _- ------- 8

brevispinosa____.. ._---------------- ------- ------------ 8

plummeri- ______---.__---_..--_-__--_---_----_------------------ 8, pl. 4
INDEX 19

Sipkonina.

Page 

._______________________________________. 9

prima................................................................... 9, pi.4

speciosa, Ellipsonodosaria stephensoni.......................................... 9

Spiroplectammina............................................................. 2

semicomplanata......................................................... 2, pi. 1

spisso-costatus, ftobulus...................................................... 4, pi. 2

stephensoni, Ellipsonodosaria....................................... ______ 9, pi. 4

Gaudryina (Siphogaudryina).............................................. 3

stephensoni speciosi, Ellipsonodosnria.......................................... 9

strinta, Gumbelina........................................___________ 7, pi. 3

subcarinatus, Cibicides...................................................... 10, pi. 4

subspherica, Globulina lacrima............................................... 6, pi. 3

texana, Trochammina......................-................................. 4, pi. 1

texanus, Ammobaculites...................................................... 2, pi. 1

Reophax................................................................. 2, pi. 1

Trochammina................................................................. 4

gyroides................................................................. 4, nl. 1

texina................................................................... 4, pi. 1

V Page 

Vaginulina............................_____ .... 6

cretacea.............................................. ___________ 6, pi. 3

multicostata........................................... .-____--.. ._ 6, pi. 2

navarroana.....................__...._...-.-..-_-------------------- 6, pi. 2

simondsi-.............________________-___... _ . 6, pi. 3

webbervillensis....... ___________________________----- 6, pi. 3

Valvulineria............__-___-______------- ____-_--. -.. 9

creiacea.....----.-._---_----------.---_-----------------_----------------- 9

varians, Pseudotextularia. _.___---------__-------------_-------------------- 8, pi. 3

Ventilator etta............................................... ..--... .. 8

carseyae....... ____-_____-__.---_-_-_-.... -----. .- 8, pi. 3

Virgulina................__._---------__-_-------- - - 8

naparroana.-------------------------------..---------------------------- 8, pi. 4

W 

watersi, Plectina__._-_._--_-_______...__._.__---.-..._ 3, pi. 1

webbervillensis, Vaginulina............. ------ ----- ------ 6, pi. 3

o