STUDIES IN FORAMINIFERA 



25 



Types and occurrence: Holotype of Hasiigerinella 

 alexanderi Cushman (type of Hastigerinoides) (Cush- 

 man Coll. 15750), figured paratype (Cushman Coll. 

 15754), figured topotypes (USNM P3920a, b), unfig- 

 ured topotypes (USNM P3933), and unfigured para- 

 types (Cushman Coll. 15754a), all from the Austin 

 chalk, clay in road cut between two railroad under- 

 passes (now removed) at the northern edge of Howe, 

 Grayson County, Texas. Holotype and paratypes col- 

 lected by C. I. Alexander; topotypes collected by A. R. 

 Loeblich, Jr. 



Figured topotype of Hastigerinoides watersi (Cush- 

 man) (USNM P3934) also from the Austin chalk at the 

 same locality, collected by A. R. Loeblich, Jr. 



Range: Aptian to Santonian. 



Genus Biglobigerinella Lalicker, 1948 



Plate 1, Figures ll-12b 



Biglobigerinella Lalicker, Journ. Paleontol., vol. 22, p. 624, 

 1948. 



Type species: Biglobigerinella multispina Lalicker, 

 1948. Fixed by original designation and monotypy. 



Test free, planispiral, nearly or completely involute, 

 biumbilicate, periphery rounded, peripheral margin 

 lobulate; chambers globular, except for the final one or 

 two which may become broadly ovate, flattened and 

 finally replaced by two paired chambers, one on each 

 side of the plane of coiling, in some species there is a 

 tendency for the chambers of the final whorl to flare out 

 in a less involute coU, with a flange extending back on 

 each side toward the previous whorl, and cm-vLng back- 

 ward at the umbilical margin, as in Globigerinelloides ; 

 sutiu-es distinct, depressed, radial to curved or even sig- 

 moid; wall calcareous, finely perforate, radial in struc- 

 ture, surface finely hispid to smooth or pitted ; aperture 

 an interiomarginal, equatorial, simple low arch in the 

 early stages, in the later paired chambers there is one 

 extraimibilical aperture in each chamber of the final 

 pair. 



Remarks: Biglobigerinella differs from Hastigerina 

 Thomson in the presence of the final paired chambers 

 and double apertiu-e, although it is similar in being plani- 

 spiral and more or less completely involute. 



Types and occurrence: Holotype of Biglobigerin- 

 ella multispina Lalicker (Cushman Coll. 51898), figured 

 paratypes (Cushman Coll. 51899 and 51900), and un- 

 figured paratypes (Cushman Coll. 51897) from the 

 Marlbrook marl (Campanian), 8 feet above the base, 

 1 % mile north of Saratoga, Howard Coimty, Ark. 



Figured hypotype (USNM P3214a) and unfigured 

 hypotjrpes (USNM P3214) from the upper Taylor marl 

 (Campanian) on the right bank of Onion Creek, just 

 downstream from the bridge at Moore and Berry's 

 crossing, 8% miles in a straight line southeast of the 

 Capitol in Austin, Travis County, Texas. Collected 

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



Unfigured hypotype (USNM P3215) from the 

 Navarro (Corsicana marl), Maestrichtian, exposed in a 



steep 80-foot slope on the right bank of Onion Creek 

 just east of the bridge (known as Jones' Crossing) on the 

 Austin-Bastrop highway, Travis County, Texas. Col- 

 lected by A. R. Loeblich, Jr. 



Range: Aptian to Maestrichtian. 



Biglobigerinella barri Bolli, Loeblich, and Tappan, new species 

 Plate 1, Figures 13-18b 



Test free, planispiral, biumbilicate, nearly involute 

 to evolute ; peripheral margin somewhat lobulate ; cham- 

 bers ovate to nearly spherical, 8 to 10 in the final plani- 

 spiral whorl, in some specimens a smaller low but broad 

 final chamber may cover a double apertured penulti- 

 mate chamber or there may be a small chamber at each 

 side of the periphery, each covering one of the lateral 

 apertiu^es of the penultimate chamber; sutures distinct, 

 depressed, radial in the early portion, becoming sig- 

 moid in the later stages; wall calcareous, finely perfor- 

 ate, surface distinctly rugose in the early portion, later 

 chambers nearly smooth or pitted; aperture interio- 

 marginal, in the early stage equatorial, a low arch bor- 

 dered above with a narrow lip, in the later stage there 

 is a double apertiu-e consisting of a small extraumbilical 

 arch at each side of the last chamber, or one to each of 

 the final paired chambers which may extend almost 

 into the imibilicus, each aperture bordered by a Up. 



Greatest diameter of holotype 0.49 mm., thickness 

 across paired chambers 0.36 mm. Paratypes range 

 from 0.39 to 0.62 mm. in diameter. 



Remarks: Biglobigerinella barri, new species, differs 

 from B. multispina Lalicker in being larger and more 

 compressed and in having 8 to 10 chambers per whorl 

 instead of only 5 to 6. The chambers are also more 

 nearly globular in B. multispina. 



The shape and number of the chambers is also similar 

 to Globigerinelloides algeriana Cushman and ten Dam, 

 from which the present species differs only in develop- 

 ing a double aperture and finally the double-chambered 

 end stage. This species strongly suggests that Biglo- 

 bigerinella may have arisen from the Aptian genus 

 Globigerinelloides. 



The specific name is given in honor of Dr. K. W. 

 Barr, in recognition of his work on the geology of 

 Trinidad. 



Types and occurrence: Holotype (USNM P4543), 

 figured paratypes (USNM P4544a-e) and unfigiu-ed 

 paratypes (USNM P4545) from the Lower Cretaceous 

 (Aptian) Maridale formation, Maridale Estate, east 

 Central Range, Trinidad, B. W. I. Collected by H. H. 

 Renz. 



Subfamily Hantkenininae Cushman, 1927 



Type genus: Hantkenina Cushman, 1924. 



Coiling of test trochospiral to planispiral; chambers 

 globular, elongate to tubulospinate; aperture equatorial 

 or areal multiple. 



Range: Cretaceous to Eocene. 



