Plate 72. HEMISPHAERAMMINA, ZOTHECULIFIDA, BERTHELINELLA, 

 CITHARINELLA, TENTIFRONS, WEBBINELLA, AEOLOSTREPTIS 



Figure 1. llemisphaerammina di-prt-ssa (Heron- 

 Allen and Earland) 



1, Hypotype (USNM P3225), from the Re- 

 cent, to show the low form and irregular border. 

 X 25. 

 Figures 2a, b. He^nisphaerammina bradxi Loeblich 

 and Tappan, new species 



2a, Holotype (BMNH ZF2626) from Recent 

 deposits off Durham, showing more elevated 

 test and completely circular outline. X 30. 

 2b, Same, at less magnification, to show attach- 

 ment. X 10. 

 Figure 3. Hemisphaeravimina batalleri Loeblich and 

 Tappan, new genus, new species 



3, Holotype (USNM P309S) from the Santon- 

 ian of Spain, showing ovate, coarsely agglutinated 

 test. X 10. 



Figures 4-8. Zotheculifida lirata (Cushman and 

 Jarvis) 



4, Holotype (Cushman Coll. 10084), showing 

 test and chamber shape, and the surface reflec- 

 tion of the internal partitions. The base of this 

 specimen is broken. 5, 7, 8a, Side views of 

 hypotypes (USNM P3086a-c), showing varia- 

 tion in degree of recurving of chambers, the 

 completely biserial early stage, and the surface 

 reflection of the internal partitions. 8b, Top 

 view, showing aperture, and narrow compressed 

 form. 6, Sectioned hypotype (USNM P4884), 

 showing the complex internal partitions which 

 form an almost labyrinthic interior at the lateral 

 extremities of the chambers. All specimens are 

 from the Upper Oligocene, Brasso formation of 

 Trinidad, B.W.I. All X 40. 



Figures 9-13. Berthelinella paradoxa (Berthelin) 



9, Topotype (USNM P4473a) showing ovate 

 proloculus and two pair of alternating chambers. 

 10, Topotype (USNM P4473b), showing single 

 pair of biserial chambers following the proloculus 

 before the development of the equitant cham- 

 bers. 11a, Topotype (USNM P4473c). lib, 

 Top view, showing simple, slitlike terminal aper- 

 ture. 12, 13, Sntall topotypes (USNM P4473d, 

 e), showing a single pair of biserial chambers. 

 All from the Pliensbachian (Lias, Lower Juras- 

 sic) of France. X 175. 



Figures 14-16. Citharinella tarrantensis (Ijoeblich 

 and Tappan) 



14, Typical hypotype (USNM P4880) showing 



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the usual 2-chambered neanic stage followed by 

 equitant chambers. Such forms could be mis- 

 taken for the genus Berthelinella, except for the 

 radial aperture. From the Gault (.^Ibian, Lower 

 Cretaceous) of England. 15, Hypotype (USNM 

 P4881). showing very rare three-chambered Cith- 

 arina-Wke neanic stage, demonstrating the true 

 generic relationships. From the Albian Denton 

 formation of Texas. 16, Hypotype (USNM 

 P4882), showing typical 2-chambered neanic 

 stage and well developed adult equitant cham- 

 bers. From the Albian Denton formation f)f 

 Texas. All X 40. 



Figures 17, 18. Tentifrons barnardi Loeblich and 226 

 Tappan, new genus, new species 



17, Paratype (BMNH P40274), showing typi- 

 cal early free Citharinella stage, followed by 

 attached fistulose adult stage. X 25. 18, 

 Holotype (BMNH P40275), showing much 

 elongated attached stage, with the early chamb- 

 ers equitant, and sutures chevron-shaped, the later 

 development increasingly more irregular, with 

 numerous apertures at the ends of fistulose ex- 

 tensions. X 9. Both from the Senonian (L'pper 

 Cretaceous) of England. 



Figure 19. ff'ebbinella hemisphaerica Qones, Parker, 226 

 and Brady) 



19, Holotype (BMNH P41659) from the Plio- 

 cene of England, showing the calcareous test, 

 and polymorphine neanic stage, quite unlike the 

 agglutinated species here placed in Hemisphaer- 

 ammina, new genus. X 55. 



Figures 20a-c. Aeolostreptis vitrea (Cushman and 227 

 Parker) 



20a, Side view of hypotype (Cushman Coll. 

 32549), showing spiral character and bluntly 

 rounded base. 20b, Apertural view, showing 

 the three chambers of the final whorl. 20c, 

 Basal view, showing the tightly coiled early 

 stage, with numerous chambers per whorl, de- 

 creasing in number per whorl in the later stage, 

 and chambers arranged in a single spiralling 

 series, not in the twisted biserial development of 

 f'irgulina. From the Dermopolis chalk, Selma 

 Group (Campanian, Upper Cretaceous) of Mis- 

 sissippi. X 235. 

 All figures are camera lucida drawings; figs. 2b, 17-19, 



by Helen Tappan Loeblich, others by Lawrence and 



Patricia Isham. 



309 



