Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

Dimensions.—Diameter of the shell 0.3 to 0.4, of the pores 0.012 to 0.016.

Habitat.—Central Pacific, Station 263 to 274, surface.

2. Castanidium wildi, n. sp.

Pores regular, circular, hexagonally framed, of the same breadth as the bars. Bristles twice as long as one pore. Radial main-spines straight and short, cylindrical, with dimpled surface (as in Pl. [113], fig. 1), as broad as one pore and as long as the diameter of the shell.

Dimensions.—Diameter of the shell 0.66, of the pores 0.045.

Habitat.—South Pacific, Station 297, surface.

3. Castanidium buchanani, n. sp. (Pl. [113], fig. 7).

Pores regular, circular, without frames, twice as broad as the bars, of variable size. Bristles five to six times as long as one pore. Radial main-spines numerous, straight, slender, cylindrical, about as long as the diameter of the shell.

Dimensions.—Diameter of the shell 0.25 to 0.3, of the pores 0.012 to 0.02.

Habitat.—Tropical Atlantic, Stations 346 to 349, surface.