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 0.11.

Habitat.—North Pacific, Station 253, depth 3125 fathoms.

5. Microcubus cornutus, n. sp.

Eight gates (two mitral, two basal, and four superior) simple; four inferior gates fenestrated by arachnoidal irregular threads. Frontal ring square, constricted on the sides by the equatorial ring. Basal ring with four short conical vertical feet, as in the preceding species. Sagittal ring with a vertical horn on the apex. All rings with small scattered thorns.

Dimensions.—Length of the shell 0.11, breadth 0.13.

Habitat.—North Pacific, Station 235, surface.

6. Microcubus amphispyris, n. sp. (Pl. [94], fig. 10).

Four gates (two mitral and two basal) simple; eight lateral gates (four superior and four inferior) fenestrated by arachnoidal irregular threads. Frontal ring convex, not constricted by the equatorial ring. Basal ring with six short conical divergent feet (two sagittal and four lateral). Sagittal ring with an apical horn. (Resembles some Spyroidea.)

Dimensions.—Length of the shell 0.08, breadth 0.12.

Habitat.—Central Pacific, Station 272, depth 2600 fathoms.