48 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Fig. 78.- 



-BOLIVINA LIMBATA. X 125. 0, FRONT VIEW, b, SAME SPECI- 

 MEN FROM OPPOSITE SIDE; C, END VIEW. 



Description. — Test elongate, much compressed, gradually tapering 

 to the rather bluntly-rounded apical end, often somewhat twisted, 



thickest along the median line, 

 thinning toward the lateral mar- 

 gins, which are slightly rounded; 

 chambers usually about as high 

 as wide, slightly tumid, the su- 

 tures very distinct, irregularly 

 curved, limbate, especially along 

 the median portion of the face; 

 wall calcareous, smooth, punc- 

 tate; aperture elongate-oval, in 

 some specimens somewhat remote 

 from the border 

 and terminal; 

 color white. 



Length 0.50- 

 0.75 mm. 



Distribution. — 

 Brady records the 

 species from the following three stations in the North Pacific, off the 

 Hawaiian Islands, in 40 fathoms, south shore of Japan, 

 15 fathoms, and in Hongkong Harbor, 7 fathoms. 

 Bagg's specimen is from Albatross station H4694, in 

 865 fathoms, off the Hawaiian Islands. 



In the material I have examined the species has 

 been noted from the following stations: Albatross 

 station D4965, in 191 fathoms, off the coast of Japan, 

 and Nero station 1466, in 234 fathoms, near Guam. 



There is a tendency in adult specimens to assume 

 a uniserial development with a terminal aperture. 

 From the other published records the species seems to 

 be confined to fairly shallow tropical and subtropical 

 waters. 



BOLIVINA (BIFARINA) PORRECTA H. B. Brady. 



Bolivina porrecta II. B. Brady, Quart. Journ. Micr. Sci., vol. 

 21, 1881, p. 57; Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 418, pi. 52, fig. 22, a, b, c— Egger, Abh. kon. 

 bay. Akad. Wiss. Miinchen, CI. n, vol. 18, 1893, p. 300, 

 pi. 8, figs. 7-9, 46, 47.— Flint, Rep. U. S. Nat. Mus., 

 1897 (1899), p. 292, pi. 38, fig. 2. 



Bifarina porrecta Millett, Journ. Roy. Micr. Soc, 1900, p. 

 540, pi. 4, fig. 3. 



Description. — Test elongate, slightly tapering, the apex rounded; 

 apertural end truncate, compressed, the edges rounded, the chambers 



Fig. 79.— Bolivina 

 (Bifarina) por- 

 recta. X 60. a, 

 apertural view; 

 b, front view. 



