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.—Length of the shell 0.13, breadth 0.1; length of the peristome 0.04.

Habitat.—North Atlantic, Færöe Channel (Gulf Stream), John Murray.

22. Challengeron carpenterii, John Murray.

Challengeron carpenterii, John Murray, 1877, in litteris, Narr. Chall. Exp., vol. i. p. 226, pl. A, fig. 8.

Shell ovate, with a series of twelve to fifteen short, conical, radial spines on the aboral half of the margin. Peristome slender, semitubular, nearly as long as the shell, in the upper half forked, with two short parallel teeth.

Dimensions.—Length of the shell 0.13 to 0.18, breadth 0.1 to 0.14; length of the peristome 0.1 to 0.12.

Habitat.—Tropical Atlantic, Stations 347 to 348, depth 2250 to 2450 fathoms.

23. Challengeron ciliatum, n. sp.

Shell ovate, slightly compressed, with numerous (forty to fifty or more) short and thin, bristle-shaped, radial spines on the margin. Peristome obliquely truncate, with three curved spines; the dorsal odd spine subvertical, nearly as long as the radius, and much stronger than the two parallel, nearly horizontal, lateral spines.

Dimensions.—Length of the shell 0.15, breadth 0.11; length of the peristome 0.1.