FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 



21 



Description.— 1 ' Test free or adherent, plano-convex; peripheral 

 edge extended so as to form a well-defined keel, often of considerable 

 width; the five segments of the outermost whorl alone visible on the 



Fig. 24.— Discoebis eaeescens (H. B. Beady). X 75. (Aftee Beady.) a, dorsal view; b, side 



view; c, ventral view. 



convex face, the last chamber being relatively large, and the sutures 

 even and marked only by fine lines; spiral face somewhat depressed 

 at the umbilicus, the valvular lobes of later segments tolerably 

 distinct. 



"Diameter l/40th inch (0.63 mm.)." 



Distribution. — The only record for this species in the North Pacific 

 seems to be that of Brady, who records it from the Challenger stations 

 off the Philippines in 95 fathoms. The figure and description are 

 from Brady. 



DISCORBIS ALLOMORPHINOIDES (Reuss). 

 Plate 9, fig. 1. 



Valvulina allomorphinoides Reuss, Sitz. Akad. Wiss. YVien, vol. 40, 1860, p. 223, 

 pi. 11, fig. 6. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 01. n, vol. 21, 

 1899, p. 43, pi. 2, figs. 4, 5. 



Discorbina allomorphinoides H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 

 9, 1884, p. 654, pi. 91, figs. 5, 8. — Chapman, Proc. California Acad. Sci., 

 ser. 3, Geol., vol. 

 1, 1900, p. 253, pi. 

 30, fig. 8.— Mil- 

 lett, Journ. Roy. 

 Micr. Soc, 1903, 

 p. 703. 



Pulvinulina allomor- 

 phinoides Forna- 

 sini, Mem.Acead. 

 Sci. Inst. Bo- 

 logna, ser. 5, vol. 

 8, 1900, p. 394, 

 fig. 44. 



Description. — Test oval, biconvex, ventral side more strongly so; 

 composed of comparatively few chambers, about four in the last 

 formed whorl; peripheral margin broadly rounded ; chambers broad; 



Fig. 25.— Discorbis allomorphinoides (Reuss). (Adapted from 

 Reuss's figures of the type), a, dorsal view; b, side view; 

 c, ventral mew. 



