90 



BULLKTIN 104, UNITED STATES NATIONAL MUSEUM. 



from Jamaica, and from numerous stations off the coast of Florida 

 and the Bahamas. In the deeper water it has occurred in the Alba- 

 tross dredgings from D2388 in 35 fathoms (66 meters) in the northern 

 part of the Gulf of Mexico, and from D2758 in 20 fathoms (37 meters) 

 off the coast of Brazil. 



Goes records it from 300 fathoms (549 meters) in the Caribbean 

 and Flint from Albatross station D2358 in 222 fathoms (407 meters) 

 in the Straits of Yucatan. 



The species is close to C. difformis Brady and probably is distri- 

 buted widely in the Indo-Pacific in similar habitats to those in which 

 it is found in the Atlantic. 



Clavulina tricariyiata — material examined. 



Subfamily 4. Bulimininae. 



Included in this family are those forms which are typified by 

 Bulimina. In typical species the arrangement of the chambers is an 

 elongate spiral. The aperture is elongate, loop-shaped, usually in 

 an oblique position, and in some species there is a tooth, flange, or 

 other structure which partially closes the opening. The test is cal- 

 careous, often hyaline in the young, but may be considerably thick- 

 ened and opaque in the adult; is always perforate. 



Genus BULIMINA d'Orbigny, 1826. 



Bulimina d'Orbigny (type, Bulimina viarginata d'Orbigny), Ann. Sci. Nat., vol. 

 7, 1826, p. 269.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 397. — Chapman, The Foraminifera, 1902, p. 172. — Cushman, Bull. 71, 

 U. S. Nat. Mus., pt. 2, 1911, p. 76. 



Description. — Test usually fusiform or tapering, free, composed of 

 numerous chambers arranged typically in a spiral, each chamber sit- 

 uated above the third preceding one, making a triserial arrangement, 

 not always visible from the surface except in the last convolution; 

 wall calcareous, perforate, usually thin and transparent, but thick- 

 ening somevv^iat with age, smooth or ornamented with raised costae, 

 spines, etc.; aperture typically a comma-shaped slit broadest above 

 and tapering obliquely to a point below, usually with a raised margin 

 and often partly closed by a tooth-like rim at one side. 



