STUDIES IN FOKAMINIFERA 



189 



Mountain limestone, in a limestone sink, K mile north 

 of Salt Mountain, in the NW)^ NWM, Sec. 34, T. 6 N., 

 R. 2 E., Clarke County, Alabama, Collected by H. T. 

 and A. R. Loeblich, Jr. 



Figured hypotype (USNM P5848) from the Nana- 

 falia formation, basal 6 feet of formation just above 

 Midway group, road cut 0.2 mile east of the Turkey 

 Creek bridge, 1.2 miles east of Kimbrough Station, 

 Wilcox County, Alabama. Collected by A. R. Loeb- 

 lich, Jr. 



Figured hj-potype (USNM P5S85) from the Velasco 

 formation, middle bed at road crossing of arroyo halfway 

 between San Jos6 de las Rusias and Soto la Marina, 

 Tamaulipas, Mexico. Collected by R. Wright Barker. 



It was originally described from the "lower Eocene" 

 of Russia, where it occurred in the Globorofalia velas- 

 coensis zone, a zone here considered to be of Paleocene 

 age. 



Globorotalia elongata Glaessner 



Plates 45, Figures 5a-c; 46, Figures 5a-c;48, Figures 5a-c; 

 49, Figures 7a-c; 54, Figures la-5c; 59, Figures 4a-c; 

 60, Figures 9a-c; 63, Figures 2a-c. 



Globorotalia pseudoscilula Glaessner var. elongata Glaessner, 



Studies in Micropaleontol., Univ. Moscow Lab. Paleontol., 



vol. 1, fasc. 1, p. 33, text-figs. 3d-f, 1937. 

 Globorotalia elongata Glaessner, Bolli, U. S. Nat. Mus. Bull. 215, 



p. 77, pi. 20, figs. 11-13, 1957. 

 Globorotalia compressa (Plummer) Toulmin, Journ. Paleontol., 



vol. 15, No. 6, p. 607, pi. 82, figs. 1, 2, 1941. 



Test free, biconvex but compressed, trochospirally 

 coiled, somewhat elongated, peripheral margin rounded 

 to subacute, peripheral outline lobulate; all chambers 

 of the 2 whorls visible on the spiral side, early coils 

 somewhat depressed, only the 4 to 5 chambers of the 

 final whorl visible on the umbilical side, which has a 

 relatively wide and open umbilicus, chambers of nearly 

 equal breadth and height, increasing rapidly in size, 

 final chamber comprising about two-fifths of the entire 

 test; sutures distinct, depressed, gently curved; wall 

 calcareous, finely perforate, siu-face smooth; aperture 

 interiomarginal, extraumbilical-umbilical, extending to 

 the periphery and may even extend slightly onto the 

 spu-al side, with a distinct lip, portions of earlier lips 

 remaining visible around the umbilicus. 



Hypotypes range in greatest diameter from 0.20 to 

 0.55 mm., and in thickness from 0.08 to 0.23 mm. 



Remarks: Globorotalia elongata differs from G. pseu- 

 domenardii BoUi in lacking the peripheral keel and 

 thickened sutures and in having a more incised spiral 

 suture. 



Types and occurrence: Figured hypotype (USNM 

 P5813) from the Matthews Landing marl member of 

 the Porters Creek clay, Naheola Landing, Tombigbee 

 River, SE%, Sec. 30, f. 15 N., R. 1 E., 11 miles east of 

 Jachin, Choctaw County, Alabama. Collected by 

 A. R. Loeblich, Jr. 



Figured hypotype (USNM P5692) from the Coal 

 Bluff marl member of the Naheola formation in creek 

 bottom, just west of store at Caledonia, about % mile 



south of center of Sec. 29, T. 11 N., R. 10 E., Wilcox 

 County, Alabama. Collected by F. Stearns MacNeil. 



Figured hypotj-pe (USNM P5693) from the Salt 

 Mountain limestone, in a limestone sink, % mile north 

 of Salt Mountain, in the NWjiNW}^, Sec. 34, T. 6 N., 

 R. 2 E., Clarke County, Alabama. Collected by 

 H. T. and A. R. Loeblich, Jr. 



Figured hj-potj'pe (USNM P5694) from the Ostrea 

 thirsae beds of the Nanafalia formation, 56 feet above 

 the Midway contact, in road cut 1.2 mUes east of 

 Kimbrough Station, and 0.2 mile east of the Turkey 

 Creek bridge, Wilcox County, Alabama. Collected by 

 A. R. Loeblich, Jr. 



Figured hypotype (USNM P5695) from the Aquia 

 formation, 42 feet above the base of the exposure, 

 west bank of Potomac River, near mouth of Aquia 

 Creek, S. 10° E. of Brent Point, on U. S. Geol. Survey 

 Nanjemoy Md.-Va. quadrangle, 1:62,500, 1913, re- 

 printed 1945. Collected by A. R. Loeblich, Jr., and 

 Richard A. Page. 



Figured hypotype (USNM P5697) from the Horners- 

 town formation, north bank of Shingle Run, a tributary 

 to Crosswicks Creek, 1.0 mile north of New Egypt, 

 Monmouth County, New Jersey. Collected by A. R 

 Loeblich, Jr., and Norman Sohl. 



Figured hypotypes (USNM P5133a-e) from the 

 Vincentown limesand, along north bluff of Rancocas 

 Creek, 0.3 to 0.5 mUe northwest of Vincentown, 

 Burlington County, New Jersey. Collected by A. R. 

 Loeblich, Jr., and Norman Sohl. 



Figured hypotype (USNM P5882) from the Velasco 

 formation, middle bed at road crossing of arroyo halfway 

 between San Jos6 de las Rusias and Soto la Marina, 

 Tamaulipas, Mexico. Collected by R. Wright Barker. 



Cloborotalia eenaensis (Le Roy) 



Plates 57, Figures 7a-c(?); 61, Figures la-2c, 9a-c 



Globigerina esnaensis Le Rot, Geol. Soc. Amer., Mem. 54, p. 31, 

 pi. 6, figs. 8-10, 1953. 



Test free, small, trochospiral, inflated, spu-al side 

 flattened, mnbilical side convex, umbilicus small, 

 periphery broadly rounded, peripheral outhne lobulate; 

 chambers increasing rapidly in size as added, four in the 

 final whorl with final chamber occupymg about one- 

 third of the umbilical side; sutures distinct, depressed, 

 radial; wall calcareous, finely perforate, sui-face finely 

 spinose; aperture an interiomarginal arch tending to 

 extend somewhat to an extraumbilical position. 



Hypotypes range in diameter from 0.25 to 0.38 mm. 



Remarks: The specimens here figured are similar 

 to the holotype of Globorotalia esnaensis (Le Roy) in 

 all respects, except that they are about half its size. 

 As various other species also appear somewhat smaller 

 in the strata here studied than elsewhere, the specimens 

 are regarded as conspecific. The present species is 

 also very similar to G. wilcoxensis Cushman and Ponton, 

 but the latter is almost truncate and the sutm-es are 

 curved and obhque on the spiral side. 



