ART. IG THE FOKAMIXIFERA GENl'S EHRENBKROINA ^CUSHMAN 3 



"This is a curious modification of the Cassiduline type, somewhat 

 aUied to Ehrenbergina hystrix, the short scattered spines of which are 

 replaced by two long processes, one at each lateral margin, protrud- 

 ing at right angles to the longer diameter of the shell. The segmen- 

 tation is exceedingly regular and the septal lines are scarcely, if at all, 

 depressed." 



This species was described from the Pleistocene of Suva, Fiji, and 

 also recorded from New Ireland in the Bismarck Archipelago. 



EHRENBERGINA FOVEOLATA Schubert 



Plate 1, figs. 3, 4 



Ehrenbergina foveololai^cnxjUERT, Abhandl. geol. Reichsanst., vn. 20, pt. I, 1911, 

 p. 01, pi. H, fig. la-/. 



The figures of this species are from photographs of specimens taken 

 out of the Pleistocene rock from the Bismarck Archipelago. They 

 are generally triangular in front view with spinose projections, evi- 

 dently more than one on a side and the striking character is the sur- 

 face ornamentation which consists of fine polygonal reticulations. 



Length 0.30-0.50 mm., breadth 0.50-0.60 mm. 



The types are from Panaras and Suralil, Middle New Mecklenburg 

 in the Bismarck Archipelago. 



The species is evidently related to E. hicornifi H. B. Brady, and E. 

 hystrix H. B. Brady, but the surface ornamentation makes it very 

 distinct from any other known species. 



LIVING SPECIES 



EHRENBERGINA HYSTRIX H. B. Brady 



Plate 1, figs. 6fl, b 



Ehrenbergina hyslrix H. B. Bkady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 60; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 434, pi. 55, figs. 8-11.— 

 Flint, Bull. 55, U. S. Nat. Mas., 1905, pp. 16, 19.— Cushman, Bull. 71, 

 U. S. Nat. Mus., pt. 2, 1911, p. 102, text figs. 156a~d.— Heron-Allen and 

 Earland, British Antarctic Exped., Zoology, vol. 6, 1922, p. 140. 



Test about as broad as long; chambers few, periphery with a stout 

 spine from the middle of each chamber, those of the earlier chambers 

 of the coiled portion scattered over that part of the ventral surface; 

 sutures on the dorsal side somewhat thickened but not elevated, on 

 the ventral side depressed; wall thick and heavy; aperture elongated, 

 curved, with immerous costae on the surface arranged in a radial 

 manner about it. 



Length up to 1 nmi. 



The type specimens are from the South Pacific. The known dis- 

 tribution is in the tropical Pacific from lat. nearly 140° W. to nearly 

 140° E., and extending barely beyond the Tropics, An exception to 



