188 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



BoHvina albatrossi Cushman 

 Plate 21, Figs. 13-15; Plate 22, Fig. 1 



BoHvina albatrossi Cushman, Bull. 104, U.S. Nat. Mus., pt. 3, 1922, 

 p. 31, pi. 6, fig. 4. — Cushman, Special Publ. 9, Cushman Lab. Foram. 

 Res., 1937, p. 153, pi. 18, figs. 22-24. 



BoHvina textilarioides Heron-Allen and Earland (not Reuss), Trans. 

 Linn. Soc. London, ser. 2, vol. 11, 1916, p. 238, pi. 41, figs. 10-14 ( ?). 



Test from li^ to 2^ times as long as broad, small, rather thick, 

 periphery broadly rounded ; chambers fairly distinct, slightly if at all 

 inflated, much broader than high throughout, increasing gradually in size 

 as added, the basal edge at the inner margin in the adult often develop- 

 ing a definite lobe and re-entrant; sutures distinct except in the early 

 portion, somewhat limbate, not depressed, strongly oblique, somewhat 

 more so in the adult portion; wall finely perforate, with coarse surface 

 ornamentation, which, in the early portion, consists of a rather coarse 

 network, the edges of which are considerably raised above the surface, 

 becoming finer and less raised toward the apertural end, the last pair of 

 chambers often fairly smooth; aperture elongate, narrow. Length up to 

 0.50 mm.; diameter 0.18-0.20 mm. 



The types are from Albatross D2677, 478 fms., off the Carolina coast. 



This species somewhat resembles B. compacta Sidebottom, but the su- 

 tures are different, and the ornamentation, particularly of the early por- 

 tion, is much more pronounced. The shape of the two forms is also quite 

 different. 



The Pacific specimens so far as our material shows are somewhat 

 broader than the Atlantic ones, although there are intermediate speci- 

 mens and the ornamentation and other characters are very similar. 



Stations: 403, 411, 412, 414, 461, 466, 472, 627, 629. 



Distribution. — The series of records from the regions of the Galapa- 

 gos give a range of 15, 60, 111 fms. At both Kobe, Japan, and Singapore 

 the bottom samples were collected from anchors. 



BoHvina argentea Cushman 

 Plate 22, Figs. 2-6 



BoHvina argentea Cushman, Contr. Cushman Lab. Foram. Res., vol. 

 2, pt. 2, 1926, p. 42, pi. 6, fig. 5 ; Bull. Scripps Instit. Oceanography, 

 Tech. Ser., vol. 1, 1927, p. 155, pi. 3, fig. 5. — Cushman and Moj^er, 



