TROPICAL PACIFIC FORAMLNIFERA OF "ALBATROSS" 15 



Genus BOLIVINA d'Orbigny, 1839 



Bnlivina d'Orbigny, Voy. Amdr. Mdrid., vol. 5, pt. 5, p. 01, 1839. 

 Synonyms: Sagrina d'Orbigny, 1839; Grammostomum Ehrenbcrg, 1840; Proroporus 

 Ehrenberg, 1844; ClidoHomuyn Ehrenberg, 1845; Brizalina Costa, 1856. 



Genotype. — By designation, Bolivina plicata d'Orbigny. 



Test elongate, usually compressed, tapering, initial end and often 

 whole test twisted ; chambers typically biserial ; wall calcareous, finely 

 or coarsely perforate; aperture elongate, usually oblique, somewhat 

 loop-shaded, often with a platelike tooth connecting with an internal 

 tube. Cretaceous to Recent. 



BOLIVINA VADESCENS Cushman 



Plate 5, Figure 4 



Bolivina vadescens Cushman, Contr. Cushman Lab. Foram. Res., vol. 9, p. 81, 

 pi. 8, figs, llo, b, 1933; Cushman Lab. Foram. Res. Special Publ. No. 9, 

 p. 126, pi. 16, fig. 11, 1937. 



Test elongate, in the adult about 2}^ times as long as broad, 

 periphery distinctly rounded, the early stages rapidly increasing in 

 width as chambers are added, after which the sides become nearly 

 parallel; chambers vely distinct but not strongly inflated, of rather 

 uniform shape thi'oughout but increasing very slightly in size as 

 added; sutures very distinct, limbate, peculiarly sigmoid, the inner 

 end especially in the adult having almost a distinct angle after which 

 the sutures pass to the border in a nearly straight Ime which is strongly 

 oblique to the horizontal; wall smooth, but very distinctly perforate ; 

 aperture at the base of the last-formed chamber, consisting of a broad 

 loop-shaped opening. Length, 0.65 mm.; breadth, 0.30 mm.; thick- 

 ness, 0.15 mm. 



This species in its general size and shape is very similar to Bolivina 

 oceanica, but the chambers are very different in their shape, and the 

 sutures particularly with their sigmoid curvature and strongly limbate 

 character are very distinct. The species is fairly common in the shoal 

 water of various areas. It occurs about Fiji off Nairai in 12 and 24 

 fathoms; off Levuka, 12 fathoms; Viva Anchorage, 3 fathoms; Makemo 

 Lagoon, Paumotu Islands; Rotonga, 7 fathoms; and at Guam Anchor- 

 age, Ladrone Islands, 21 fathoms. The only Albatross station from 

 which I have had the species is H3890, lat. 16°25'00" S., long. 

 143°33'00" W., in 1,108 fathoms, 36.1° F., glob. oz. mang. 



BOLIVINA HANTKENIANA H. B. Brady 



Plate 5, Figures 5-8 



Bolivina hantkeniana H. B. Bradt, Quart. Journ. Micr. Sci., vol. 21, p. 58, 1881; 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 424. pi. 53, figs. 16-18, 1884.— Egger, 

 Abh. kon. bay. Akad. Wiss. Munchen, Cl. n, vol. 18, p. 296, pi. 8, figs. 40-42, 

 1893. — MiLLETT, Journ. Roy. Micr. Soc, 1900, p. 546, pi. 4, fig. 9. — Cush- 

 man, U. S. Nat. Mus. Bull. 71, pt. 2, p. 42, fig. 68 (in text), 1911.— Side- 



