TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 59 



TRIFARINA BRADYl Cuahman 



Plate 15, Figure 13 



Rhabdogonium tricarinatum H. B. Brady (not Vaginulina Iricarinata d'Orbigny), 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 525, pi. 67, figs. 1-3, 1884; Journ. 

 Roy. Micr. Soc, 1887, p. 910. — H. B. Brady, Parker, and Jones, Trans. 

 Zool. Soc. London, vol. 12, p. 223, pi. 45, fig. 3, 1888.— Wright, Ann. Mag. 

 Nat. Hist., ser. 6, vol. 4, p. 449, 1889; Proc. Roy. Irish Acad., ser. 3, vol. 1, 

 p. 484, 1891. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, CI. ii, vol. 18, 

 p. 355, pi. 11, figs. 49, 50; pi. 12, figs. 36-38, 1893. 



Trifarina bradyi Cushman, U. S. Nat. Mus. Bull. 104, pt. 4, p. 99, pi. 22, figs. 

 3-9, 1923; Carnegie Inst. Washington Publ. 342, p. 27, pi. 7, fig. 5, 1924.— 

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

 Hanzawa, Jap. Journ. Geol. Pal., vol. 4, p. 41 (table), 1925 (1926).— Cush- 

 man, Contr. Cushman Lab. Foram. Res., vol. 1, pt. 4, p. 86, 1926. — Chap- 

 man and Parr, Journ. Linn. Soc. Zool., vol. 36, p. 386, pi. 20, fig. 52, 1926.— 

 Cushman, Contr. Cushman Lab. Foram. Res., vol. 5, p. 96, pi. 13, fig. 39, 

 1929; Cushman Lab. Foram. Res. Special Publ. No. 4, pi. 22, fig. 15, 1933; 

 No. 5. pi. 28, figs. 15a-c, 1933; B. P. Bishop Mus. Bull. 119, p. 127, pi. 15, 

 fig. 11, 1934. — Palmer and Bermudez, Mem. Soc. Cubana Hist. Nat., vol. 

 10, p. 293, 1936. — Chapman and Parr, Australasian Antarctic Exped., ser. 

 C, vol. 1, pt. 2, p. 98, 1937.— OvEY, Journ. Roy. Micr. Soc, vol. 47, p. 121, 

 1937.— AsANO, Journ. Geol. Soc. Japan, vol. 45, No. 538, p. 615, pi. 17 (6), 

 fig. 25, 1938. 



Test elongate, slightly tapering toward either end, often somewhat 

 twisted, triangular in transverse section, with carinae at three angles, 

 thin and fairly high, running from the initial end to the aperture, 

 even onto the neck itself; chambers distinct, those of the earlier 

 portion at least irregularly spiral, later ones less distinctly so; sutures 

 distinct but not depressed; wall thin, translucent, finely punctate, 

 smooth; aperture terminal, central, at the end of a short tubular 

 neck, usually with a phialine lip. Length, 0.40 mm.; breadth, 

 0.18 mm. 



This species is widely distributed both in the Atlantic and Pacific. 

 It is possible that the Pacific form may be distinguished from the 

 Atlantic one, the latter having the sides more concave and the carinae 

 at the angles higher and more prominent with a thinner keel while it is 

 less distinctly perforate. This is not the same as d'Orbigny 's Vaginu- 

 lina iricarinata, which is a peculiar form with the aperture at one 

 angle. This species occurs most abundantly in deep water, as will be 

 seen by the data of the long list of Albatross stations given in table 29. 

 Besides these, specimens have occurred in 12 fathoms off Nairai, Fiji; 

 12 fathoms off Levuka, Fiji; and in 7 fathoms off Rotonga. 



408333—41- 



