REPORT ON THE RADIOLARIA. Mo 



2. Leptofipli(era .sci-rata, u. .sp. 



Inner shell with regular, hexagonal meshes, five to six times as broad as the bars ; outer shell 

 three times as broad, with simple triangular meshes. Eadial spines with three serrated edges (of 

 the same form as the main spines of Drymosphccra dendrophora, PI. 20, fig. 1). 



Dimensions. — Diameter of the outer shell 045, of the inner 0'15. 



Habitat. — Central Pacific, Station 271, surface. 



3. LeptosphcBra pohjijonalls, u. sp. 



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

 twice as broad, with simple triangular meshes. Eadial spines with three smooth edges. 

 (Resembles Brymosphcvra jwlygonalis, PI. 19, fig. 1, but has no by-spiue.s.) 



Dimensions. — Diameter of the outer shell 0"35, inner 0'175. 



Habitat. — North Pacific, Station 256, surface. 



Subgenus 2. Leptosplmromma, Haeckel. 



Definition. — Radial spines with three rows of lateral branches (one row on 

 each edge). 



4. LeptosphcBra ciliata, n. sp. 



Inner shell with regular, hexagonal meshes and very thin thiead-like bars ; outer shell three 

 times as broad, with simple triangular meshes. Eadial spines with smooth edges and three rows 

 of simple, smooth, curved, lateral branches (six branches on each edge), similar to those of Diplosphcera 

 gracilis. 



Dimensions. — Diameter of the outer shell 0'6, inner 0'2. 



Habitat. — South Atlantic, Station .325, surface. 



5. Leptosphcera spinosa, Haeckel. 



Diplosphcera sjnnosa, R. Hertwig, 1879, Orgaiii.smus d. Radiol., p. 40, Taf. v. fig. 2. 



Inner shell with regular, hexagonal meshes, five times as broad as the bars ; outer shell three 

 times as broad, with simple triangular meshes. Eadial spines with three densely serrated edges, 

 and^with three rows of serrated, simple, curved, lateral branches (three branches on each edge). 

 Differs from the preceding in the thicker bars and the elegantly denticulated spines and branches. 



Dimensions. — Diameter of the outer shell 0'66, inner 0'22. 



Habitat. — Mediterranean (Messina), E. Hertwig. 



6. Leptosphcera stellata, n. ay. 



Inner shell with regular, hexagonal meshes, six times as broad as the bars, each bar crossed 

 by a transverse tangential rod, so that each mesh represents an elegant six-rayed star (as 



