Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia) / Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII

by Ernst Haeckel

Habitat.—Indian Ocean, Belligemma, Ceylon, surface; Haeckel.

19. Cenosphæra maxima, n. sp.

Shell thick walled, smooth. Pores regular, circular, twice as broad as the bars, thirty to thirty-three on the quadrant.

Dimensions.—Diameter of the shell 0.3 to 0.4, pores 0.012, bars 0.006.

Habitat.—West Tropical Pacific, Station 225, depth 4475; also fossil in Barbados.

20. Cenosphæra compacta, n. sp. (Pl. [12], fig. 7).

Shell very thick walled, rough (its wall one-fourth to one-third as thick as the radius). Pores subregular, circular, of the same breadth as the bars, seven to eight on the quadrant.

Dimensions.—Diameter of the shell 0.15, pores and bars 0.012.

Habitat.—Central Pacific, Station 265, depth 2900 fathoms.

Cenosphæra radiata, Zittel, 1876 (L. N. [29], p. 84, Taf. ii. figs. 7, 8), a fossil Cretaceous species, is closely allied to Cenosphæra compacta.