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 0.06, breadth 0.03.

Habitat.—South Atlantic, Station 332, depth 2200 fathoms.

4. Medusetta quadrigata, n. sp. (Pl. [120], fig. 2).

Shell ovate, campanulate, smooth, little broader than the wide open mouth. Apical horn longer than the shell, more or less curved, smooth. Feet cylindrical, about as long as the shell, strongly curved and somewhat spirally revoluted, with a series of short curved teeth on the abaxial margin.

Dimensions.—Length of the shell 0.07 to 0.09, breadth 0.04 to 0.06.

Habitat.—North Pacific (off Japan), Stations 231 to 237, surface.

5. Medusetta tetranema, n. sp. (Pl. [120], fig. 3).

Shell campanulate, conical, smooth, nearly twice as broad as the constricted mouth, without prominent velum. Apical horn somewhat shorter, straight, conical, thorny. Feet strongly curved inwards, convergent, twice as long as the shell, each with four to six strong, ascending, alveolate branches on the abaxial margin.

Dimensions.—Length of the shell 0.07 to 0.09, breadth 0.05 to 0.07.

Habitat.—Tropical Atlantic, Station 352, surface.