TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 43 



which result in a lobulated outline of the test, and by its clear to 

 translucent wall, in which the perforations are usually visible distinctly 

 as they are in Cassidulina patula. The apertural face of the final 

 chamber is often broader than high and sometimes appears to over- 

 hang the rest of the test. 



Some of the immature specimens are hard to distinguish from 

 C. subglobosa. In general, the separation is based on the more 

 smoothly rounded test of C. subglobosa and the greater inflation of the 

 individual chambers in C. gemma. 



CASSIDULINA MINUTA Cushman 



Plate 17, Figure 3 



Cassidulina minuta Cushman, 1933, Contr. Cushman Lab. Foram. Res., vol. 9, 

 pt. 4, p. 92, pi. 10, fig. 3.— Cushman, Todd, and Post, 1954, U.S. Geol. 

 Surv. Prof. Paper 260-H, p. 366, pi. 90, fig. 35. 



This species seems to be the only shallow-water species of this 

 genus. It occurs fairly commonly in the shallower samples of the 

 present collections and less frequently in the deeper samples. 



Besides its small size, this species is characterized by its compressed 

 test with smooth, not lobulated, periphery and the chambers which, 

 from the opposite sides, show only as small triangles. The aperture 

 is an elongate slit parallel to the suture, as in Cassidulina delicata, 

 but with its outer end continuing into a loop-shaped opening extend- 

 ing into the apertural face as in C. subglobosa. 



CASSIDULINA MOLUCCENSIS Germeraad 



Plate 15, Figure 2 



Cassidulina moluccensis Germeraad in Rutten and Hotz, 1946, Geol., Petrogr. 

 and Paleont. Results of Explor. Island of Ceram, ser. 3, Geol., no. 2, p. 72, 

 pi. 2, figs. 29-32. 



This species was described from "Young-Neogene" Globigerina- 

 bearing sediments of central Seran, D.E.L It is distinctive in its 

 involute test; only the final four chambers make up the exterior 

 surface of the test. The outline of the test is broad at the base and 

 bluntly pointed at the top. The test is slightly compressed but not 

 angled on the periphery, and the apertural face is flattened or con- 

 cave. The aperture is large, broad, and loop-shaped, extending 

 nearly vertically into the apertural face. The wall is smooth and 

 finely punctate and the sutures are distinct and slightly depressed. 



Rare but typical specimens were found in four of the deep-water 

 samples. 



CASSIDULINA PACIFICA Cushman 



Cassidulina pacifica Cushman, 1925, Contr. Cushman Lab. Foram. Res., vol. 1, 

 pt. 3, p. 53, pi. 9, figs. 14-16.— Parr, 1950, B.A.N.Z. Antarctic Res. Exped. 

 1929-1931 Rep., ser. B, vol. 5, pt. 6, Foraminifera, p. 343, pi. 12, fig. 23. 



729-019— 65 4 



