98 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



the aperture is viewed from above there is visible a broad tooth-like 

 plate partially filling the aperture except at the upper end. This 

 gives the aperture a very narrow appearance in some views. 



In this region at least C. crassa seems to be much more common and 

 more widely distributed than C. laevigata. 



CASSIDULINA SUBGLOBOSA H. B. Brady. 



Cassidulina subglobosa H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 

 60; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 430, pi. 54, figs. 17, a-c— 

 H. B. Brady, Parker, and Jones, Trans. Zool. Soc, London, vol. 12, 1888, 

 p. 221, pi. 43, figs. 12-14. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, 

 CI. n, vol. 18, 1893, p. 304, pi. 7, figs. 41, 42, 52, 53.— Goes, Bull. Mus. Comp. 

 Zool., vol. 29, 1896, p. 49.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 293, 

 pi. 38, figs. 4.— Chapman, Journ. Linn. Soc, vol. 30, 1907, p. 33, pi. 4, fig. 

 84.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 140. 



Description. — Test with an oval outline, subglobular, inequilateral, 

 somewhat compressed on the two faces, the peripheral border broadly 



Fig. 152.— Cassidulina subglobosa. X 30. a, ventral view; b, side view; c, dorsal view. 



Tounded; chambers few, somewhat inflated; sutures slightly depressed, 

 wall calcareous, perforate, smooth; aperture fairly broad and short, 

 looplike or oval; color, white. 



Diameter, 0.50 -1.00 mm. 



Distribution. — The two stations in the Northwest Pacific from 

 which Brady records this species are in 2,300 and 2,950 fathoms. 

 Goes records the species from the southeastern part of the area 

 in 770-1,201 fathoms, and Bagg found it in material from three 

 Albatross stations near the Hawaiian Islands, H4430, H4571, and 

 H4585, in 384-1,259 fathoms. In the Nero material this species 

 was very common in the area between Guam and Japan at an average 

 depth of about 1,500 fathoms. Specimens from the Albatross 

 material from off the coast of Japan were dredged in 130 and 200 

 fathoms. In the Tuscarora material this species occurred at several 

 stations: station 2, in 1,468 fathoms, near the Hawaiian Islands; 

 station 13, in 190 fathoms, off the coast of California; station 23, in 



