94 



BULI.KTIN 104, UNITKD STATES NATIONAL MUSEUM. 



Description. — Test short, ovate, composed of overlapping cham- 

 bers, triserial, the sutures deep; edge of chamber cxtendmg out 

 into a free wingUke expansion with a crenuhited border extending 

 outward into short spines, from which raised costae extend back into 

 the outer surface of the chambers; upper portions of the chambers 

 smooth and unornamented ; wall transparent and thin in the young, 

 becoming thickened and white in the adult; aperture an obliquely 

 placed slit, elongated, widest near the upper end, usually with a 

 raised border, and often with a lip extending in on the concave side. 



Length 0.4-1.0 mm. 



Distribution. — This is a very widely spread species, especially in 

 comparatively deep water, occurring usually in some numbers wher- 

 ever Glohigerina-oozQ occurs. Along the Atlantic coast it has been 

 found at numerous stations and according to the records it occurs also 

 in fairly deep water off the coast of Europe. It is recorded by Brady, 

 Parker, and Jones from the Abrohlos Bank off Brazil, and it is also 

 recorded from various parts of the Pacific. It is replaced in the 

 Gulf of Mexico and in the Caribbean by the following variety. 



Bulimina injiata — material examined. 



