REPORT ON THE RADIOLARIA 249 



bristle-shaped radial by-spines. Radial main spines with three smooth edges. (Differs from the 

 first species of the other three genera of Diplosphserida in the presence of by-spines on the outer, 

 and their absence on the inner shell.) 



Dimensions. Diameter of the outer shell - 32, inner 016. 



Habitat. Central Pacific, Station 274, surface. 



2. Drymosphara polygonalis, n. sp. (PI. 19, fig. 1). 



DiplospJiiera polygonalis, Haeckel, 1879, Atlas. 



Inner shell with irregular, polygonal meshes and very thin thread-like bars ; outer shell one 

 and a half times as broad, with simple triangular meshes and thicker bars, which bear numerous 

 bristle-shaped radial by-spines (in the figure the majority of these are broken off). Radial main spines 

 with three smooth edges. (Similar to Leptosphcera polygonalis and Diplosphcera polygonalis, but 

 differs from both in the presence of by-spines on the outer, and their absence on the inner shell.) 



Dimensions. Diameter of the outer shell 0'33, inner 0'22. 



Habitat. North Pacific, Station 236 south of Japan, surface. 



Subgenus 2. Drymosphceromma, Haeckel. 

 Definition. Radial by-spines forked or branched (main spines simple). 



3. Drymosphcera furcata, n. sp. 



Inner shell with irregular, polygonal meshes and thin bars, the former five times as broad as 

 the latter ; outer shell two and a half times as broad, with simple triangular meshes and smooth 

 bars, bearing numerous long smooth bristle-shaped by-spines, which in the distal half are forked. 

 Radial main spines with three smooth edges. 



Dimensiom. Diameter of the outer shell 04, inner 0'16. 



Habitat. Indian Ocean, Ceylon, surface, Haeckel. 



4. Drymosphcera cladophora, n. sp. 



Inner shell with irregular, polygonal meshes, three to six times as broad as the smooth bars ; 

 outer shell twice as broad, with simple triangular meshes and very thin smooth bars, bearing 

 numerous curved, irregularly branched, smooth by-spines. Radial main spines with three 

 serrated edges. 



Dimensions. Diameter of the outer shell 0'4, inner 0'2. 



Habitat. Central Pacific, Station 276, surface. 



5. Drymosphcera dendrophora, n. sp. (PL 20, figs. 1, la, Ib). 



Inner shell with irregular, polygonal meshes and very thin thread-like bars ; outer shell one 

 and a half times as broad, with simple triangular meshes and thicker bars, which bear a forest of 



(ZOOL. CHALL. KXP. PART XL. 1885.) Rr 32 



