TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 47 



Genus EHRENBERGINA Reuss, 1850 



EHRENBERGINA ALBATROSSI Cushman 



Plate 21, Figures 2, 3 



Ehrenbergina albatrossi Cushman, 1933, Contr. Cushman Lab. Foram. Res., vol. 9, 

 p. 94, pi. 10, fig. 8. 



This rare, compressed species has been found in only five samples 

 (Albatross stations H3870, H3873, H3900, H3913, and H3937). The 

 surface is somewhat roughened over the early part of the test. The 

 species is distinguished by its heavy and widely spaced lateral spines 

 extending outward in a nearly horizontal direction. 



EHRENBERGINA BICORNIS Brady 



Plate 21, Figure 1 



Ehrenbergina bicornis Brady, 1S88, Quart. Journ. Geol. Soc, vol. 44, p. 5, pi. 1, 

 fig. 3.— Cushman, 1934, B. P. Bishop Mus. Bull. 119, p. 133, pi. 16, 

 figs. 10, 11. 



A single specimen of this unique species was found at Albatross 

 station H3984. It has not been reported previously from the Recent 

 and, indeed, its Recent origin here is by no means certain. Its pre- 

 vious records are the Pleistocene and Pliocene of Fiji and a "White 

 Chalk" from the island of New Ireland in the Bismarck Archipelago. 

 This chalky deposit from New Ireland is now regarded as of late 

 Cenozoic age because it contains such late-appearing species as 

 Globigerinoides sacculijer and Globorotalia tumida. Glaessner (1943, 

 p. 68) has regarded Ehrenbergina bicornis as an index species for the 

 Miocene. 



This species constitutes a transitional form between Ehrenbergina 

 and Cassidulina. Ehrenbergina bicornis might be considered either a 

 tightly coiled Ehrenbergina or a Cassidulina with the addition of 

 axial spines. 



EHRENBERGINA HYSTRIX Brady 



Ehrenbergina hystrix Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 434, 

 pi. 55, figs. 8-11. 



A single specimen (with apertural end broken) was found at station 

 H3926. The species is distinguished by its inflated form and coarsely 

 bearded ornamentation. 



EHRENBERGINA PACIFICA Cushman 



Plate 20, Figure 1 



Ehrenbergina pacifica Cushman, 1927, Proc. U.S. Nat. Mus., vol. 70, art. 16, p. 5, 

 pi. 2, fig. 2.— Cushman, Todd, and Post, 1954, U.S. Geol. Surv. Prof. Paper 

 260-H, p. 367, pi. 90, fig. 36. 



Two specimens from Albatross station H3984 and one from H3899 

 appear to belong in this species, widely distributed in the Pacific, which 



