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

Dimensions.—Diameter of the sphere 0.19, pores and bars 0.015.

Habitat.—Fossil in the Alpine Lias (Schafberg near Salzburg, Dunikowski).

13. Staurosphæra apostolorum, Haeckel.

? Cenosphæra megapora, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. iii. fig. 1.

? Cenosphæra micropora, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. iii. fig. 2.

Shell thin walled, smooth, with large, irregular, roundish pores, twice to six times as broad as the bars; four to six on the quadrant. Four spines conical, very stout, about as long as the shell diameter, often more or less irregularly disposed.

Dimensions.—Diameter of the sphere 0.12 to 0.2, pores 0.01 to 0.03, bars 0.005.

Habitat.—Fossil in Barbados.

Subgenus 4. Staurosphæromma, Haeckel.

Definition.—Pores irregular, of different size or form; surface covered with by-spines or accessory thorns.