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

23. Cenosphæra reticulata, Haeckel.

Cyrtidosphæra reticulata, Haeckel, 1862, Monogr. d. Radiol., p. 349, Taf. xi. fig. 2.

Shell very thin walled, smooth. Pores irregular, polygonal, two to eight times as broad as the bars, fifteen to twenty on the quadrant (groups of four to eight smaller meshes are scattered on the surface, and separated by reticular rows of larger meshes).

Dimensions.—Diameter of the shell 0.16, pores 0.004 to 0.016, bars 0.002.

Habitat.—Mediterranean (Messina), surface.

24. Cenosphæra tenerrima, n. sp.

Shell extremely thin walled, smooth, like a cobweb. Pores very irregular and small, polygonal with thread-like bars, thirty to forty on the quadrant.

Dimensions.—Diameter of the shell 0.25, pores 0.002 to 0.008, bars under 0.001.

Habitat.—Central Pacific, Station 271, surface.

25. Cenosphæra polygonalis, n. sp.