TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 67 



chambers. The test is flattened. The dorsal and ventral surfaces 

 are slightly and about equally convex, the dorsal spue being low and 

 indistinct and the ventral digitate lobes extending inward to cover 

 the umbilical region. The wall is neither spinose nor smooth and 

 polished but has a rather roughened surface, giving it a sugary texture. 



Genus ORBULINA d'Orbigny, 1839 



ORBULINA UNIVERSA d'Orbigny 



Orbulina universa d'Orbigny, 1839, in Barker-Webb and Berthelot, Hist. 

 Nat. lies Canaries, Paris, vol. 2, pt. 2, Foraminiferes, p. 123, pi. 1, fig. 1. — 

 Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 608, pi. 78; pi. 81, 

 figs. 8-26; pi. 82, figs. 1-3. — Bradshaw, 1959, Contr. Cushman Found. 

 Foram. Res., vol. 10, p. 49, pi. 8, figs. 17, 18. 



This well-known cosmopolitan species is found in most of the 

 deep-water samples, usually fairly commonly. The diameter of the 

 adults is about 0.8 mm. No bilocular individuals were noted. 



Genus PULLENIATINA Cushman, 1927 



PULLENIATINA OBLIQUILOCULATA (Parker and Jones) 



Plate 27, Figures 2-4 



Pullenia obliquiloculata Parker and Jones, 1865, Philos. Trans., p. 368, pi. 19, 

 fig. 4. 



Pulleniatina obliquiloculata (Parker and Jones). — Bradshaw, 1959, Contr. 

 Cushman Found. Foram. Res., vol. 10, p. 49, pi. 8, figs. 19, 20. — Todd, 

 1964, U.S. Geol. Surv. Prof. Paper 260-CC, p. 1089, pi. 289, figs. 2, 3. 



This well-known and cosmopolitan species occurs in association with 

 the other planktonics in many of the deep-water samples and is com- 

 mon or abundant in many of them. 



Its highly polished wall is one of its distinguishing characteristics. 

 Immature individuals often lack this smooth surface, however, and 

 in those specimens the distinguishing feature seems to be the broad 

 low aperture with inward-curved lips. 



Genus SPHAEROIDINELLA Cushman, 1927 



SPHAEROIDINELLA DEHISCENS (Parker and Jones) 



Plate 26, Figures 5, 6 



Sphaeroidina dehiscens Parker and Jones, 1865, Philos. Trans., p. 369, pi. 19, 

 fig. 5. — Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 621, pi. 84, 

 figs. 8-11. 



Sphaeroidinella dehiscens (Parker and Jones). — Bradshaw, 1959, Contr. Cush- 

 man Found. Foram. Res., vol. 10, p. 49, pi. 8, figs. 21-23. 



Sphaeroidina bulloides d'Orbigny var. dehiscens Parker and Jones. — Banner 

 and Blow, 1960, Contr. Cushman Found. Foram. Res., vol. 11, p. 35, pi. 7, 

 fig. 3. 



