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

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

Subgenus 3. Aulosphærissa, Haeckel.

Definition.—Radial tubes verticillate, armed with a variable number of regular verticils of lateral branches.

7. Aulosphæra verticillata, n. sp.

Radial tubes slender, cylindro-conical, straight, tapering towards the distal end, about as long as the smooth, cylindrical, tangential tubes; armed with eight to twelve verticils of three curved, simple, lateral branches. (Very similar to the tubes of Aulastrum trichoceros, Pl. [111], fig. 5a.)

Dimensions.—Diameter of the sphere 1.6; tangential tubes 0.15 long, 0.008 broad.

Habitat.—South Pacific, Station 300, surface.

8. Aulosphæra spathillata, n. sp. (Pl. [109], figs. 7, 7a).

Radial tubes slender, cylindro-conical, straight, tapering towards the distal end, two to three times as long as the smooth, cylindrical, tangential tubes; armed with two or three distal alternate verticils, each of which forms a horizontal cross of four (sometimes three or five) equidistant branches; their distal ends are on the terminal cross simple hooks, on the proximal cross spathillæ.

Dimensions.—Diameter of the sphere 3.2; tangential tubes 0.12 to 0.16 long, 0.01 broad.