FORAMINIFERA OF THE ATLANTIC OCEAN. 



Bidiminella subcylindrica — material examined. 



113 



BULIMINELLA SPINIGERA, new species. 



Plate 23, tigs. 1-4. 



Description. — Test fusiform, the initial end terminating in a single 

 stout spine, apertural end rounded, composed of numerous chambers 

 arranged in a twisted, elongate spiral, little if at all compressed, 

 broadest near the apertural end; chambers numerous, elongate, 

 indistinct; sutures indistinct, not depressed; w^all very smooth and 

 shining, slightly translucent; aperture large, irregularly oval, 

 slightly pointed near the edge of the chamber; color white. 



Length 0.40-0.85 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 16276) from Alba- 

 tross station 1)2677, in 478 fathoms (873 meters), off the coast of 

 North Carolina. Other specimens of the same species are from this 

 same station, but it was not seen elsewhere in all the western At- 

 lantic material examined. 



By its peculiar shape, heavy spine at the initial end, gloss}'- smooth 

 surface, and large aperture, it is very different from the other species 

 noted here. It is related to B. elegantissima d'Orbigny. 



Bidiminella spinigera — matervtl examined. 



Genus BULIMINOIDES Cushman, 1911. 



BULIMINOIDES WILLIAMSONIANA (H. B. Brady). 



Bulimina williamsoniana H. B. Brady, Quart. Journ. Micr. Soc, vol. 21, 1881, \>. 



56; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 408, pi. 51, figs. 16, 17.— 



MiLLETT, Journ. Roy. Micr. Soc, 1900, p. 279, pi. 2, fig. 8.— Bagg, Proc. 



U. S. Nat. MuB., vol. 34, 1908, p. 136.— Heron-Allen and Earland, TranB. 



Zool. Soc. London, vol. 20, 1915, p. 641. 

 Buliminoides villiamsoniana Cushman, Bull. 71, U. S. Nat. Mus., pt. 2, 1911, p. 



90, fig. 144 (in text); Publ. 311, Carnegie Inst. Wash., 1922, p. 31, pi. 3, 



fig. 7. 



