Habitat.—South Pacific, Station 289, depth 2550 fathoms.
6. Orosphæra horrida, n. sp. (Pl. [106], fig. 2).
Radial spines club-shaped, very strong, straight, about as long as the diameter of the polyhedral shell, ovate and smooth in the distal half, slenderly conical, and armed with recurved spines in the proximal half; their outer third is the thickest, and five times as broad as the smooth bars of the coarse network. Meshes of the latter irregularly quadrangular.
Dimensions.—Diameter of the shell 1.2 to 1.6, length of the spines 1.2 to 2.0, breadth 0.2.
Habitat.—South Pacific, Station 291, depth 2250 fathoms.
7. Orosphæra clavigera, n. sp.
Radial spines club-shaped, thickened towards the distal end, more or less curved, spinulate, about as long as the diameter of the spherical shell; in the distal third four to six times as broad as the spinulate bars. Meshes irregularly polygonal, the majority pentagonal.
Dimensions.—Diameter of the shell 2.0 to 2.5, length of the spines 1.8 to 2.2, breadth 0.16.
Habitat.—Central Pacific, Station 263, depth 2650 fathoms.