2 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Family HETEROHELICIDAE 

 Subfamily Bolivinitinae 



Genus BOLIVINITA Cushman, 1927 



Bolivinita Cushman, Contr. Cushman Lab. Foram. Res., vol. 2, pt. 4, p. 90, 1927. 



Genoholotype. — Textularia quadrilatera Schwager. 



Test with chambers biserial, periphery and broader sides all con- 

 cave, with strongly developed angles giving a quadrate end view to 

 the test; wall calcareous, perforate; aperture large, at base of inner 

 margin in the m.edian line. Upper Cretaceous to Recent. 



BOUVINITA QUADRILATERA (Schwager) 



Plate 1 



Textularia quadrilatera Schwageb, A''omro-Exped., Geol. Theil, vol. 2, p. 253, pi. 



7, fig. 10, 1866.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, p. 358, 



pi. 42, figs. 8-12, 1884.— Flint, Rep. U. S. Nat. Mus. for 1897, p. 283, pi. 



28, fig. 3, 1899.— MiLLETT, Journ. Roy. Micr. Soc, 1899, p. 559, pi. 7, fig. 



3.— Bagg, Proc. U. S. Nat. Mus., vol. 34, p. 131, 1908.— Cushman, U. S. 



Nat. Mus. Bull. 71, pt. 2, p. 24, figs. 42-44 (in text), 1911.— Yabe and 



Hanzawa, Jap. Journ. Geol. Pal., vol. 4, p. 50, 1925 (1926). 

 BoUvina quadrilatera Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, p. 475, 1891. — 



Cushman, U. S. Nat. Mus. Bull. 104, pt. 3, p. 44, pi. 8, fig. 2, 1922. 

 Bolivinita quadrilatera Makiyama, Mem. College Sci. Kyoto Imp. Univ., ser. B, 



vol. 7, No. 1 (art. 1), p. 42 (list), 1931.— Cushman, B. P. Bishop Mus. 



Bull. 119, p. 121, pi. 14, figs. 12a, 6, 1934. — Chapman and Parr, Australasian 



Antarctic Exped., ser. C, vol. 1, pt. 2, p. 101, 1937. — Asano, Journ. Geol. 



Soc. Japan, vol. 45, No. 538, p. 607, pi. 16 (5), fig. 17, 1938. 



Test elongate, slender, very slightly tapering, in end view quadri- 

 lateral, the angles usually carinate; chambers high and narrow, run- 

 ning back obliquely on the outer border, compressed; the initial end 

 of the test often with a stout spine, occasionally with several small 

 spines or smooth and broadly rounded, the early chambers sometimes 

 with one or more longitudmal raised costae for a short distance ; wall 

 hyaline, distinctly perforate; aperture at one side near the distal end 

 of the chamber, sometimes obliquely elongate, but somewhat varia- 

 ble. Length, up to 1.25 mm. 



This species was originally described from the Pliocene of Kar Nico- 

 bar by Schwager. It is a characteristic species of the present Indo- 

 Pacific region although it apparently also occurs in the Atlantic. 

 The Atlantic specimens, however, as a rule seem to lack the basal 

 spine, and it may be that other differences may make it possible to 

 separate the Atlantic form. In the present collections this species 

 has occurred almost entirely at Albatross stations, the data for which 

 will be foimd in table 2. In addition it has occurred at 3 fathoms, 

 Viva Anchorage, Fiji, and at 12 fathoms off Levuka, Fiji. At some 

 of the Albatross stations, as will be noted, the species is relatively 

 abundant. 



