TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 17 



as high, the middle area of each expanded into coarse, spinose pro- 

 jections; sutures distinct, strongly depressed, straight, oblique, form- 

 ing an angle of 25°-30° with the horizontal in the adidt, more strongly- 

 oblique in the early stages; wall distinctly perforate; aperture elongate, 

 with a slightly expanded opening at the base of the inner margin of 

 the chamber. Length, 0.60 mm.; breadth, 0.35 mm.; thickness 

 0.20 mm. 



The types are from 40-50 fathoms off Fiji. 



This resembles B. simpsoni Heron-Allen and Earland but is much 

 more coarsely spinose. 



BOUVINA ROBUSTA H. B. Brady 



Plate 6, Figure 2 



Bolivina robusta H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, p. 27, 1881; Rep. 

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

 Abh. kon. bay. Akad. Wiss. Munchen, CI. ii, vol. 18, p. 294, pi. 8, figs. 31, 

 32, 1893.— Chapman, Proc. Zool. Soc. London, 1895, p. 24.— Millett, 

 Journ. Roy. Micr. Soc, 1900, p. 543.— Chapman, Journ. Linn. Soc. Zool., 

 vol. 28, p. 400 (list), 1902; Trans. New Zealand Inst., vol. 38, p. 89, 1905 

 (1906).— Bagg, Proc. U. S. Nat. Mus., vol. 34, p. 139, 1908.— Chapman, 

 Rep. Foram. Subantarctic Islands of New Zealand, p. 331, 1909; Journ. 

 Linn. Soc. Zool., vol. 30, p. 404, 1910.— Cushman, U. S. Nat. Mus. Bull. 71, 

 pt. 2, p. 36, figs. 59, 60, 1911. — Chapman, Biol. Res. Endeavour, vol. 3, pt. 1, 

 p. 20, 1915. — Heron-Allen and PJarland, Trans. Zool. Soc. London, vol. 20, 

 p. 646, 1915. — SiDEBOTTOM, Journ. Roy. Micr. Soc, 1918, p. 126.— Cush- 

 man, U. S. Nat. Mus. Bull. 100, vol. 4, p. 129, 1921.— Heron-Allen and 

 Earland, British Antarctic Exped., Zool., vol. 6, p. 136, 1922; Journ. Linn. 

 Soc. Zool., vol. 35, p. 621, 1924. — Yabe and Hanzawa, Jap. Journ. Geol. 

 Pal., vol. 4, p. 50, 1925 (1926).— H.\da, Trans. Sapporo Nat. Hist. Soc, voL 

 11, pt. 1, p. 11, 1929; Sci. Rep. Tohoku Imp. Univ., ser. 4, Biol., vol. 6, p. 131, 

 fig. 88, 1931. — Heron-Allen and Earland, Discovery Reports, vol. 4, p. 345, 

 1932. — Earland, Dzscot^erT/ Reports, vol. 7, p. 102, 1933. — Cushman, Cushman 

 Lab. Foram. Res. Special Publ. No. 9, p. 131, pi. 17, figs. 1-4, 1937. 



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

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



Test about twice as long as broad, compressed, greatest breadth 

 formed by the last pair of chambers, periphery subacute, initial end 

 often with a single large acicular spine ; chambers distinct, very slightly 

 if at all inflated, much broader than high throughout, increasing 

 gradually in size as added ; sutures distinct, strongly limbate, obliquely 

 curved, at the periphery forming an angle of about 45° with the 

 horizontal, the later ones usually crenulate, owing to the basal margin 

 of the chamber having a series of alternating lobes and reentrants; 

 wall coarsely perforate, somewhat sculptured by the crenulated 

 margins, and occasionally showing traces of rudimentary costae; 

 aperture a small, oval opening, often with a slight lip. Length, up to 

 0.60 mm.; breadth, 0.25-0.30 mm.; thickness, 0.15-0.18 mm. 



