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.—Cosmopolitan; Mediterranean, Atlantic, Indian, Pacific, surface.

2. Sagena pertusa, n. sp.

Network subregular, with nearly equal triangular meshes. Bars of the network smooth, its nodal points pierced by a circular hole.

Dimensions.—Diameter of the shell 1.2 to 1.8, length of the bars 0.2 to 0.25, breadth 0.003.

Habitat.—Central Pacific, Stations 270 to 274, surface.

3. Sagena triangula, n. sp.

Network very regular, with equilateral triangular meshes. Bars of the network spinulate, like those of Sagoplegma spinulosa. (Pl. [108], fig. 14), its nodal points solid, not pierced.

Dimensions.—Diameter of the shell 2.2, length of the bars 0.25, breadth 0.004.

Habitat.—South Atlantic, Station 325, surface.

4. Sagena crucifera, n. sp.