TROPICAL PACIFIC FORAMLNIFERA OF "ALBATROSS" 57 



This is apparently a cosmopolitan species in deep water. It is 

 recognized easily by its clear wall showing the cloudy mottling that is 

 characteristic of aragonitic species. In the present collection the 

 species is distributed widely but never abundantly. 



Genus CERATOBULIMINA Toula, 1915 



CERATOBULIMINA PACIFICA Cushman and Harris 



Plate 23, Figure 1 



Ceratobulimina pacifica Cushman and Harris, 1927, Contr. Cushman Lab. 

 Foram. Res., vol. 3, pt. 4, p. 176, pi. 29, fig. 9.— LeRoy, 1941, Colorado 

 Sch. Mines Quart., vol. 36, no. 1, pt. 1, p. 42, pi. 1, figs. 30-32; pt. 2, p. 85, 

 pi. 4, figs. 34, 35; 1944, vol. 39, no. 3, pt. 2, p. 89, pi. 7, figs. 7, 8.— Hofker, 

 1951, Siboga-Exped., Mon. IVa, pt. Ill, p. 316, text figs. 214-218.— Sac al 

 and Debourle, 1957, Soc. Geol. France, Mem. No. 78, p. 46, pi. 20, fig. 5. 



This species was described from off the Philippines in 494 fathoms. 

 It is rare but present in numerous deep-water samples of the present 

 collections. 



The specimens of Ceratobulimina that have been separated into 

 species are very similar in appearance; a monographic study of the 

 genus undoubtedly would result in the combining of some that are 

 now regarded as specifically distinct. Nevertheless, C. pacifica is, for 

 the present at least, regarded as distinguishable by its more globular 

 and inflated test with individually bulging chambers and by its dis- 

 tinct and elongate aperture that extends as a straight slit into the 

 apertural face. Among the 22 specimens found in the present collec- 

 tions, all were coiled dextrally. This feature seems, from the pub- 

 lished illustrations, to be true of all but a few Eocene specimens in 

 this genus. 



In addition to its Recent occurrences, the species has been recorded 

 from the Miocene of the Dutch East Indies and France. 



Genus GEMINOSPIRA Makiyama and Nakagawa, 1941 



GEMINOSP1RA CONVOLUTA (Williamson) 



Bulimina pupoides var. convoluta Williamson, 1858, Recent Foraminifera of Great 



Britain, p. 63, pi. 5, figs. 132, 133. 

 Bulimina convoluta Williamson. — Brady, 1884, Rep. Voy. Challenger, Zoology, 



vol. 9, p. 409, pi. 113, fig. 6. 

 Pseudobulimina convoluta (Williamson). — Said, 1949, Cushman Lab. Foram. 



Res. Spec. Publ. 26, p. 26, pi. 4, fig. 4. 

 Geminospira simaensis Makiyama and Nakagawa, 1941, Journ. Geol. Soc. 



Japan, vol. 48, no. 572, p. 39, text figs. 3-5. 

 Pseudobulimina simaensis (Makiyama and Nakagawa). — Asano, 1950, Illustr. 



Cat. Japanese Tert. Smaller Foram., pt. 2, Buliminidae, p. 2, figs. 5-7; 1958, 



Sci. Rep. Tohoku Univ., ser. 2 (Geol.), vol. 29, p. 13, pi. 3, figs. 14, 15. 



