134 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



BOLIVINA SEMICOSTATA Cushman. 



Bolivina costata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 426 



pi. 53, figs. 26, 27 (not B. costata d'Orbigny, 1839). 

 Bolivina semicostata Cusuman. Bull. 71, U. S. Nat. Miis., pt. 2, 1911, p. 43, figs 



70a. b (in text). 



A single specimen occurred at D5666, Macassar Strait, 272 fath- 

 oms (498 meters), bottom temperature 47.5° F (10.8° C); and an- 

 other from D5443, east coast of Luzon, San Bernardino Strait to 

 San Miguel Bay, bottom temperature 51.3° F. (10.6° C). Some of 

 the specimens obtained by Brady from the Cliallenger material were 

 from off New Guinea. 



Little is known of the distribution of this seemingly Indo-Pacific 

 species. 



Bolivina semicostata — Material examined. 



BOLIVINA SCULPTURATA Cushman. 



Plate 27, figs. 3 a, 6. 



Bolivina sculpturata Cushman, Proc. U. S. Nat. Mus., vol. 44, 1913, p. 635, pi. 

 80, fig. 2. 



Description.- — ^Test flattened, rhomboid, chambers nearly flat on 

 the surface, the borders raised with a rounded rim, as are also the 

 areas above the sutures, proximal end rounded, distal end tending 

 to become uniserial; aperture on the terminal face of the last-formed 

 chamber, on the inner face of the previously-formed ones ; wall com- 

 posed of finely granular material, yellowish-brown, raised borders of 

 a whitish calcareous material. 



Length about 1 mm. 



Type specimen. — Cat. No. 8505, U.S.N.M., from Albatross station 

 D5236, Pacific Ocean, east coast of Mindanao, 494 fathoms (903 

 meters). 



The peculiar ornamentation of this species, with its terminal aper- 

 ture as well as the materials of its construction, makes this species 

 a distinctive one. 



Bolivina sculpturata — Material examined. 



