36 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



BOLIVINA COMPACTA (Sidebottom). 



Bolivina robusta H. B. Brady, var. compacta Sidebottom, Mem. Proc. Man- 

 chester Lit. and Philos. Soc, vol. 49, No. 5, 1905, p. 15, pi. 3, fig. 7. 



Description. — Test elongate, tapering, the apex blunt-pointed, com- 

 pressed, the edges rounded, the chambers numer- 

 ous, somewhat inflated; sutures slightly de- 

 pressed; surface areolated by the eoalescence of 

 the raised edges of the rather coarse punctse; 

 aperture elongate, with a slightly raised border; 

 color silvery white. 



Length about 0.60 mm. 



Distribution. — Specimens which agree well with 

 the figure and description given by Sidebottom 

 have been found at various stations in the North 

 Pacific. The relation to Bolivina robusta does not 

 seem to be close enough to make it a variety of 

 that species, and so I have raised it to specific 

 rank. 



It was secured near the Hawaiian Islands at 

 Albatross station H3007, in 323 fathoms, and at 

 two Nero stations in the same region, from Guam, 

 and from a Nero station near the Philippines. 



Fig. 58.— Bolivina com- 

 pacta. X 120. a, FRONT 

 view; b, END VIEW. 



BOLIVINA ROBUSTA H. B. Bradv. 



Bolivina robusta II. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 57; Rep. 



Voy. Challenger, Zoology, vol. 9, 1884, p. 421, pi. 53, figs. 7-9.— Egger, Abh. 



kon. bay. Akacl. Wiss. Munchen, CI. n, vol. 18, 1893, p. 294, pi. 8, figs. 31, 32.— 



Millett, Journ. Roy. Micr. Soe., 1900, p. 543. — (?)Chapman, Journ. Linn. 



Soc. Zool., vol. 30, 1907, p. 32, pi. 4, fig. 82.— (?)Bagg, Proc. U. S. Nat. Mus., 



vol. 34, 1908, p. 138. 

 Bolivina acaulis Egger, Abh. kon. bay. Akad. Wiss. Munchen, CI. n, vol. 18, 



1893, p. 295, pi. 8, figs. 28-30. 



Description. — Test roughly triangular, tapering gradually to the 

 apical end, which is either bluntly rounded or with a long, stout spine; 

 apertural end very broadly rounded, almost obliquely truncate; test 

 thickest at the median line, from which it slopes away to the fairly 

 thin but rounded lateral edges; chambers numerous, longer than 

 high, curved, in the later often crenulate with fairly deep reentrants 

 on the posterior margin; sutures scarcely depressed, limbate, curved; 

 wall calcareous, thickly set with rather coarse perforations; aper- 

 ture oval with a slightly raised lip; color white or gray, 



Length about 0.50 mm.; microspheric proloculum 0.011-0.012 mm.; 

 megalospheric proloculum 0.047-0.050 mm. 



Distribution. — From the North Pacific, Brady records this species 

 as occurring at three stations in from 7-345 fathoms, the last being on 



