180 



UNITED STATES NATIONAL MUSEUM BULLETIN 215 



Prince Georges County, Maryland. Collected by A. 

 E. Loeblich, Jr. and Kichard A. Page. 



This species occurs also in the Pine Barren member 

 of the Clayton formation of Alabama. 



Chiloguembeliiia species 

 Plate 47, Figure 1 



Remaeks: a single specimen of Chiloguembelina was 

 obtained from the Salt Mountain limestone, which is 

 somewhat poorly preserved, and not here identified 

 specifically. It is larger, thicker and more robust than 

 C. midwayensis (Cushman), and is less flaring. It is 

 smaller and less flaring than Heterohelix vnlcozensis 

 (Cushman and Ponton) , has the eccentric aperture with 

 flap at one side characteristic of Chiloguembelina, and 

 the surface is smooth rather than with coarse perfora- 

 tions aligned in longitudinal striae. 



Length of figured specimen 0.25 mm. 



Ttpes and occurrence: Figured specimen (USNM 

 P5832) from the Salt Mountain limestone, in a lime- 

 stone sink, Yi mile north of Salt Mountain, in the 

 NWK NWK, Sec. 34, T. 6 N., R. 2 E., Clarke County, 

 Alabama. Collected by H. T. and A. R. Loeblich, Jr. 



Genus Tubitextvilaria Sulc, 1929 



Tubitextularia alabamensis (Cushman) 



Plate 41, Figure 7 



RectogHmhelina alabamensis Cushman, Contr. Cushman Lab. 

 Foram. Res., vol. 16, pt. 3, p. 65, pi. 11, fig. 16, 1940. 



Test free, tiny, elongate, early portion generally 

 consisting of 5 pair of biserial chambers followed by 3 

 cuneate-appearing uniserial chambers; chambers in- 

 flated, increasing gradually in size; sutures distinct, 

 depressed, somewhat oblique in both biserial and uni- 

 serial stages; wall calcareous, perforate, surface finely 

 hispid; aperture terminal, slightly eccentric, bordered 

 with a slight lip. 



Length of figured hypotype 0.23 mm. 



Remarks: This species was originally described from 

 Midway chalk overlying the Ostrea pulaskensis bed in 

 Alabama. The species is relatively rare in the Clayton 

 formation of Alabama. 



Types and occurrence: Figured hypotype (USNM 

 P5686) from the McBryde limestone member of the 

 Clayton formation, in bed of Rock Creek, 0.8 mile south 

 of the junction of Alabama highways 28 and 10, on 

 highway 10, Wilcox Coimty, Alabama. CoUected by 

 A. R. Loeblich, Jr. 



Tubitextularia laevigata Loeblich and Tappan, new species 



Plate 41, Figure 6 



Test free, small, elongate, early part flaring rapidly, 

 with 4 to 5 pairs of biseriaUy arranged chambers fol- 

 lowed by 2 or rarely 3 subglobular uniserial chambers, 

 of somewhat lesser breadth than the preceding biserial 

 stage; sutures distinct, slightly depressed, nearly hori- 

 zontal; waU calcareous, finely perforate, surface smooth; 

 apertm'e in the biserial stage at the base of the final 



chamber, terminal in the uniserial stage of the adult 

 test, produced on a short fragile neck which is com- 

 monly broken. 



Length of holotype 0.25 mm. 



Remarks: Tubitextularia laevigata, new species, is 

 closest in appearance to T. midwayensis (Cushman) with 

 which it is associated. It differs in the larger and more 

 flaring test, more globular uniserial chambers and the 

 smooth rather than hispid wall surface. 



Types and occurrence : Holotype (USNM P5820) 

 from the McBryde limestone member of the Clayton 

 formation, in bed of Rock Creek, 0.8 mfle south of the 

 junction of Alabama highways 28 and 10, on highway 

 10, Wilcox County, Alabama. CoUected by A. R. 

 Loeblich, Jr. 



Family Orbulinidae Schultze, 1854 

 Subfamily Globigerininae Carpenter, 1862 



Genus Globigerina d'Orbigny, 1826 

 Glohigetina aquiensis Loeblich and Tappan, new species 



Plates 51, Figures 4a-5c; 56, Figures 4a-6c 



Test free, trochospiral, subglobular to relatively high- 

 spired, periphery broadly romided, peripheral outline 

 lobulate, lunbiUcus open; commonly with foiu* sub- 

 globular chambers in the final whorl, and may have a 

 smaller thin-waUed final chamber somewhat resembling 

 a buUa, but with a normal aperture; sutures distinct, 

 depressed, slightly curved; waU calcareous, perforate, 

 surface finely hispid, most prominently in the umbilical 

 region; aperture umbilical, with a narrow lip, a fairly 

 high open arch. 



Holotype 0.28 mm. in diameter, 0.23 mm. in thick- 

 ness. 



Remarks: G. aquiensis, new species, is similar to 

 6. spiralis BoUi in being high spired, but differs in being 

 considerably smaller, with fewer and more globular 

 chambers per whorl, and in being finely hispid. 



Types and occurrence: Holotype (USNM P5839) 

 from the Aquia formation, 10 to 13 feet above base of 

 the exposure, west bank of Potomac River, near mouth 

 of Aquia Creek, S. 10° E. of Brent Point on U. S. Geo- 

 logical Survey Nanjemoy Md.-Va. Quadrangle, 1:62,- 

 500, 1913, reprinted 1945. Collected by A. R. Loeblich, 

 Jr., and Richard A. Page. 



Figured paratypes (USNM P5840a, b) from same 

 locality as above but from 6 to 9 feet above base of the 

 exposiu-e. 



Figm-ed paratypes (USNM P5841a, b) from the 

 Vincentown formation, north bank of Rancocas Creek, 

 0.3 to 0.5 miles northwest of Vincentown, Bm-lington 

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

 and Norman Sohl. 



Globigerina chascanona Loeblich and Tappan, new species 



Plates 49, Figures 4a-5c; 61, Figures 8a-c 



Test free, trochospiral, subglobular to high spired, 

 periphery rounded, peripheral outline lobulate, aU 



