FORAMINIFERA OF NORTH PACIFIC OCEAN. 



99 



1,964 fathoms, in the middle of the Pacific, south of Midway Island; 

 station 4 1 , in 530 fathoms, off California ; and station 83, in 282 fathoms, 

 off the western Aleutian Islands. Taken with the other records these 

 give a rather broad distribution, including most parts of the North 

 Pacific, as well as rather wide ranges in depth. 



The species is very distinct from the others of the genus, the sub- 

 globose form, and the short oval or loop-like aperture serving to dis- 

 tinguish it at once. 



CASSIDULINA ELEGANS Sidebottom. 



Cassidulina elegans Sidebottom, Journ. Queckett Micr. Club, ser. 2, vol. 11, 

 1910, p. 106, pi. 4, figs. 1, b, c. 



Description. — Test somewhat globular, somewhat compressed later- 

 ally; chambers numerous, distinct; sutures fairly deep; wall of the 

 distal border of the chambers often raised into a well-marked keel; 

 surface somewhat roughened ; aperture a curved loop-like slit, oblique, 

 with a raised border. 



Diameter, 0.40-0.60 mm. 



Distribution. — This species, recently described by Sidebottom from 

 the Southwest Pacific, occurred at four Nero stations between Guam 

 and Japan as follows, 1301, in 1,088 fathoms, 1308, in 1,040 fathoms, 

 1309, 891 fathoms, and 1464, in 891 fathoms. 



This species is ornate with raised ridges and is at once distin- 

 guished from all other species of the genus. 



CASSIDULINA BRADYI Norman. 



Cassidulina bradyi (Norman, MS.) Wright, Proc. Belfast Nat. Field Club, App., 

 1880, p. 152.— H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 59; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 431, pi. 54, figs. 6-10.— Egger, 

 Abh. k6n. bay. Akad. 

 Wiss. Miinchen, CI. n, 

 vol. 18, 1893, p. 304, pl. 

 7, figs. 38-40.— Goes, 

 Kongl. Svensk. Vet. 

 Akad. Handl., vol.25, No. 

 9, 1894, p. 44, pl. 8, figs. 

 423-426 ; Bull. Mus. Comp. 

 Zool.,vol.29,1896,p.49.— 

 Sidebottom, Mem. Proc. 

 Manchester Lit. Philos. 

 Soc, vol. 49, No. 5, 1905, 

 p. 17, pl. 3, fig. 10. 



Description. — Test elon- 

 gate, compressed, the early 

 portion spirally coiled, the 

 later chambers forming an uncoiled biserial series; lateral faces convex; 

 peripheral border thin, either acute or (usually) somewhat rounded ; 

 chambers fairly long, very slightly inflated; suture very slightly 



Fig. 153.— Cassidulina bradyi. X 60. a, view from 



DORSAL SIDE; 6, APERTURAL VIEW; C, SIDE VIEW. 



