STUDIES IN FORAMXNIFERA 



193 



Figured hypotype (USNM P5727) from the Coal 

 Bluflf 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 

 Coimty, Alabama. Collected by F. Stearns MacNeil. 



Figured hypotype (USNM P5728) from the type 

 locality of the Brightseat formation, 1 mile west- 

 southwest of Brightseat and 0.2 mile south of Sheriff 

 Road, Prince Georges County, Maryland. Collected 

 by A. R. Loeblich, Jr., and Richard A. Page. 



Globorotalia pseudomenardii Bolli 



Plates 45, Figures lOa-c; 47, Figures 4a-c; 49, Figures 6a-c; 

 54, Figures 10a-13c; 69, Figures 3a-c; 60, Figures 8a-c; 63, 

 Figures la-c 



Globorotalia pseudomenardii Bolli, U. S. Nat. Mus. Bull. 215, 

 p. 77, pi. 20, figs. 14-17, 1957. 



Globorotalia memfcranacco (Ehrenberg) Toulmin, Journ. Paleontol., 

 vol. 15, No. 6, p. 608, pi. 82, figs. 4, 5, 1941. 



Globorotalia cf. membranacea (Ehrenberg) Hofker, Rep. Mc- 

 Lean Foram. Lab., No. 2, p. 14, pi. 4, 1965. 



Test free, biconvex but compressed, trochospirally 

 coiled, periphery with a narrow but distinct keel; all 

 chambei-s of the 2}^ whorls visible on the gently but 

 regularly convex spiral side, low and broad and curved 

 backwards at the periphery, only the 5 to 5K chambers 

 of the final whorl visible on the umbilical side, where 

 they are of nearly equal height and breadth and more 

 wedge-shaped in outline, although the final chamber is 

 commonly relatively large and almost hemispherical in 

 outline, occasional specimens may show only a gradual 

 increase in size or even a final chamber smaller than the 

 penultimate one, umbilicus small or nearly closed; 

 sutxires of the early whorls somewhat obscure on the 

 spiral side, those of final whorl strongly curved back- 

 ward and somewhat thickened although flush with the 

 surface, radial and sUghtiy depressed on the umbilical 

 side; wall calcareous, finely perforate, siu-face smooth; 

 aperture interiomarginal, extraumbilical-un^bilical with 

 a narrow lip, and in specimens with nearly closed um- 

 bilicus the aperture tends to become completely ex- 

 travunbilical and to extend to the peripheral keel. 



Hypotypes range in greatest diameter from 0.19 to 

 0.48 mm. and in thickness from 0.10 to 0.22 mm. 



Remahks: Oloborotalia pseudomenardii Bolli differs 

 from the somewhat similar 0. elongata Glaessner in 

 having a peripheral keel, thickened and flush, rather 

 than incised, sutures, which are more strongly curved on 

 the spiral side, and a more gradual increase in chamber 

 size and less enlarged final chamber, resulting in a less 

 elongate test. The spiral side is gently convex, with 

 flush chambers and sutures in all whorls, whereas in 6. 

 elongata the more incised radial and spiral sutures give a 

 depressed appearance to the early whorls. 



Oloborotalia membranacea (Ehrenberg) of Toulmin is 

 identical with this species, the original figures showing 

 weU the characteristic peripheral keel and thickened 

 and curved sutures on the spiral side. Planulina 

 membranacea Ehrenberg was originally recorded from 

 Cretaceous chalk and two specimens were figured by 



transmitted light. No description was given and no 

 depository cited for the types. As keeled Globorotalia is 

 not found in the Cretaceous, Ehrenberg's form is un- 

 doubtedly not identical with the present species, and the 

 only available evidence (the original figures) could 

 place the form in almost any coiled genus. It is there- 

 fore unrecognizable. 



Types and occurrence: Figured hypotype (USNM 

 P5701) from the Matthews Landing marl member of the 

 Porters Creek clay, Naheola Landing, Tombigbee River, 

 SEK, Sec. 30, T. 15 N., R. 1 E., 11 miles east of Jachin, 

 Choctaw County, Alabama. Collected by A. R. 

 Loeblich, Jr. 



Figured hypotype (USNM P5702) from the Salt 

 Mountain limestone, in a limestone sink, % mile north 

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

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

 and A. R. Loeblich, Jr. 



Figured hypotype (USNM P5703) from the Aquia 

 formation, 15 to 17 feet above the base of the exposure, 

 west bank of Potomac River near mouth of Aquia 

 Creek, S. 10° E. of Brent Pomt, on U. S. Geological 

 Survey Nanjemoy, Md.-Va. Quadrangle, 1:62,500, 1913, 

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

 Richard A. Page. 



Figm-ed hypotype (USNM P5704) 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 P5137a-d) from the Vin- 

 centown limesand, along north bluff of Rancocas Creek, 

 0.3 to 0.5 mile northwest of Vincentown, Burlington 

 County, New Jersey. Collected by A. R. Loebhch, Jr., 

 and Norman Sohl. 



Figured hypotype (USNM P5706) from the Ostrea 

 thirsae beds of the Nanafalia formation, approximately 

 56 feet above contact with the Midway, in road cut 1.2 

 mile east of Kimbrough Station and 0.2 mile east of the 

 Tiu-key Creek Bridge, Wilcox County, Alabama. Col- 

 lected by A. R. Loeblich, Jr. 



Figured hypotype (USNM P5887) from the Velasco 

 formation, middle bed at road crossing of arroyo half- 

 way between San Jos6 de las Rusias and Soto la Marina, 

 Tamaulipas, Mexico. Collected by R. Wright Barker. 



Globorotalia pseudoscitula Glaessner 



Plates 46, Figures 4a-c; 48, Figures 3a-c; 53, Figures 6a-c; 

 59, Figures 2a-c; 63, Figures 6a-c 



Globorotalia pseudoscitula Glaessner, Studies in Micropaleontol., 

 Univ. Moscow Lab. Paleontol., vol. 1, No. 1, pp. 32, 49, 

 text figs. 3a-c, 1937. 



Test free, trochospiral, biconvex, almost lenticular 

 in form, umbihcus small to nearly closed, peripheral 

 margin subacute, peripheral outline very slightly lobu- 

 late; chambers appearing limate from the spiral side, 

 inflated and broadly cimeate from the umbilical side, 

 ovate to almost angular rhomboid in section, increasing 

 gradually in size as added, 5, or more rarely 6 to 7, in the 

 final whorl; sutures nearly flush, curved, oblique and 



