STUDIES IN FORAMINrFERA 



191 



formation, middle bed at road crossing of arroyo half- 

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

 Tamaulipas, Mexico. Collected by E. Wright Barker. 

 The species also occurs in the Ostrae thirsae beds of 

 the Nanafalia formation in a road cut 1.2 miles east 

 of Kimbrough Station and 0.2 mile east of the Turkey 

 Creek bridge, WUcox County, Alabama. 



Globorotalia irrorata Loeblich and Tappan, new species 



Plates 46, Figures 2a-c; 61, Figures 5a-c 



Test free, small, trochospiral, spiral surface some- 

 what flattened, umbilical surface inflated, umbilicus 

 small and deep, periphery broadly rounded, peripheral 

 outline gently lobulate; chambers increasing gi-adually 

 in size, 4 to 5 per whorl; sutures depressed, oblique on 

 the spiral side, radial on umbilical side; wall calcareous, 

 finely perforate, sm-face covered with short blunt spines; 

 apertiu-e a low interiomarginal, extraumbUical-umbUical 

 arch. 



Holotype 0.26 mm. in diameter. 



Remarks: Globorotalia irrorata, new species, differs 

 from Acarinina intermedia Subbotina in having lower 

 chambers, with less rapid increase in thickness. It 

 differs from Globigerina soldadoensis Bronnimann in 

 having a more flattened spiral side, lower chambers, 

 radial instead of oblique sutures on the umbUical side, 

 and a lower, and more extraumbilical aperture. 



Globorotalia convexa differs from the present species 

 in having broader and lower chambers, more oblique 

 sutures, and a less broadly rounded periphery. 



The specific name is from the Latin, irroratus, be- 

 dewed, covered with granules, and refers to the hirsute 

 surface. 



Types and occurrence: Holotype (USNM P5872) 

 from the Nanafalia formation, south vaUey wall of 

 Shoal Creek, 5.5 miles southeast of Camden, along the 

 Camden-Fatama road, Wilcox County, Alabama. 

 Collected by A. R. Loeblich, Jr. 



Figured paratype (USNM P5873) from the Coal Bluff 

 marl member of the Naheola formation, in creek bottom 

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

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

 Alabama. Collected by F. Stearns MacNeil. 



Globorotalia occlusa Loeblich and Tappan, new species 



Plates 65, Figures 3a-c; 64, Figures 3a-c 



Test free, of medium size, trochospiral, spiral side 

 flat, umbilical side convex, with a very small and deep 

 umbilicus, periphery keeled, peripheral outline entire 

 to slightly lobulate; chambers gradually increasing in 

 size, 4 to 5, rarely 6, in the final whorl, of greatest thick- 

 ness at the umbilical shoulder immediately adjacent to 

 the narrow umbilicus, umbilical shoulder subacutely 

 rounded; sutures distinct, curved and oblique, thick- 

 ened and flush to slightly elevated on the spiral side, 

 radial and moderately depressed on the umbilical side; 

 wall calcareous, finely perforate, surface smooth except 

 for the thickened sutures on the spiral side and the 

 peripheral keel which may be marginally nodose to 



hirsute, umbilical side with a somewhat granular ap- 

 pearance, particularly in the early region of the final 

 whorl; aperture an interiomarginal, extraimibilical- 

 umbilical arch with a distinct lip above. 



Greatest diameter of holotype 0.45 mm. 



Remarks: Globorotalia occlusa, new species, differs 

 from G. velascoensis (Cushman) and G. acuta Toulmin 

 in being smaller, of less thickness, and in having a small, 

 almost closed umbilicus in place of the wide umbilicus 

 and sharply angled, highly ornamented umbilical 

 shoulder. It also differs from G. velascoensis in having 

 fewer chambers per whorl and from G. acuta in having 

 elevated sutures on the spiral side. 



It differs from G. crater Finlay in having a more 

 narrow umbilicus and a less elevated umbilical side. 



The specific name is from the Latin occlusus, shut up, 

 closed, and refers to the narrow umbilicus. 



Types and occurrence: Holotype (USNM P5874) 

 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. 



Figured parat}T)e (USNM P5866) from the Vincen- 

 town formation, north bluff of Rancocas Creek, 0.3 to 

 0.5 miles northwest of Vincentown, Burlington County, 

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

 Norman Sohl. 



This species also occurs in the Salt Mountain lime- 

 stone of Alabama and the Aquia formation of Virginia. 



Globorotalia perclara Loeblich and Tappan, new species 



Plates 40, Figures 7a-c; 41, Figures 8a-c; 42, Figures 4a-c; 

 45, Figures lla-c; 46, Figures 3a-c; 47, Figures 6a-c; 

 50, Figures la-c; 54, Figures 6a-7c; 57, Figures 3a-4c; 

 60, Figures 5a-c 



Glohigerina of. pseudo-bulloides Plummer, Shifflet, Maryland 

 Dep. Geol., Mines and Water Resources Bull. 3, p. 71, pi. 

 4, figs. 14, 15, 1948. 



Test free, trochospiral, sides flattened, umbilicus 

 small, peripheral margin broadly rounded, peripheral 

 outline lobulate; 5 to 6 chambers in the final whorl, 

 increasing gradually in size as added, rounded to ovate 

 in shape, or may somewhat overhang the preceding 

 suture, of somewhat gieater breadth than height on 

 the spiral side, and commonly somewhat excavated 

 near the spiral sutiu-e, elevated near the periphery; 

 sutures distinct, depressed, ciu-ved back at the periphery 

 on the spiral side, radial on the umbilical side; wall 

 calcareous, finely perforate, surface smooth to finely 

 hispid on the spiral side, distinctly spLnose on the 

 umbUical side; aperture a small, interiomarginal, 

 extraumbilical-umbilical arch. 



Holotype 0.26 mm. in diameter. 



Remarks: The specimens from the Aquia formation 

 of Aquia Creek, Virginia, referred by Shifflet (1948) to 

 Globigerina cf. pseudobulloides Plummer, belong to the 

 present species. It differs from G. pseudobulloides 

 (which is here considered also a Globorotalia) in the 

 much smaller size, lower chambers, which increase 



