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 0.55, of the pores 0.025.

Habitat.—Indian Ocean, Cocos Islands (Rabbe), surface.

3. Castanarium lyelli, n. sp.

Pores regular, circular, without hexagonal frames, of the same breadth as the bars. Radial bristles twice as long as the diameter of one pore.

Dimensions.—Diameter of the shell 0.24, of the pores 0.015.

Habitat.—Central Pacific, Station 272, depth 2600 fathoms.

4. Castanarium lubbocki, n. sp.

Pores irregularly roundish, about of the same breadth as the roundish, non-crested bars. Radial bristles one-third as long as the radius.

Dimensions.—Diameter of the shell 0.36, of the pores 0.01 to 0.02.

Habitat.—Tropical Atlantic, Station 348, depth 2450 fathoms.