FOKAMINIFEEA OF THE NORTH PACIFIC OCEAN. 37 



final whorl, short and broad; sutures distinct, somewhat depressed; 

 wall rather coarsely punctate, especially on the dorsal surface; 

 aperture a narrow arched opening on the periphery of the test. 



Diameter up to 1.25 mm. 



Distribution. — The only previously recorded station for this species 

 in the North Pacific is one given by Brady from the Challenger 

 material in 2,300 fathoms. I have had specimens from numerous 

 stations, off the Hawaiian Islands, off Guam and between Guam and 

 Japan, depths ranging from 276 to 1,588 fathoms. 



TRUNCATULINA TENERA H. B. Brady. 



Plate 16, fig. 2; plate 23, fig. 6. 



Truncatulina tenera H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 665, pi. 95, figs, lla-c. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 

 CI. n, vol. 18, 1893, p. 402, pi. 16, figs. 45-47. 



Description. — "Test regularly Rotaliform; both faces convex, 

 peripheral edge acute and lobulated. Consisting of rather more than 

 three convolutions of nearly equal width, the last of which is formed 

 of five or six segments; sutures distinct, slightly depressed, marked 

 on the superior face by nearly straight radial lines; aperture a curved 

 fissure bordered by a thickened Up, situated at the inner margin of 

 the final segment near the periphery. 



"Diameter l/55th inch (0.46 mm.)." 



Distribution. — Apparently this species has not been previously 

 recorded from the North Pacific. The only material of the species 

 which I have had is from Albatross station D4951 in 703 fathoms, 

 bottom temperature 37.7° F., off Japan. 



The material is very typical. The above description is from 

 Brady. 



TRUNCATULINA DUTEMPLEI (d'Orbigny). 

 Plate 15, fig. 2. 



Rolalina dutemplei d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, p. 157, 

 pi. 8, figs. 19-21. 



Truncatulina dutemplei Reuss, Denkschr. Akad. Wiss. Wien, vol. 25, 1865, p. 160, 

 pi. 4, fig. 16.— H. B. Brady, Rep. Voy. Challenges; Zoology, vol. 9, 1884, 

 p. 665, pi. 95, fig. 5a-c. — Terrigi, Mem. Accad. Lincei, ser. 4, vol. 6, 1889, 

 p. 118, pi. 8, figs. 10, 11.— Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 

 CI. ii, vol. 18, 1893, p. 400, pi. 16, figs. 22, 23, 30, 54-56.— Bagg, Proc. U. S. 

 Nat. Mus., vol. 34, 1908, p. 157.— Chapman, Journ. Linn. Soc, Zoology, 

 vol. 30, 1910, p. 421. 



Description. — Test free, dorsal surface flattened at the sides, um- 

 bonate in the center, ventral surface convex; chambers about six in 

 the last formed coil; peripheral margin broadly rounded; sutures 

 slightly depressed, but very distinct; wall rather coarsely punctate, 



