Aspinal holes circular, with smooth convex margin and four circular aspinal pores. Porules of the shell simple, without ring and dimple. Four edges of the spines smooth, their outer free part about as long as the diameter of the shell.
Dimensions.—Diameter of the shell 0.25; outer length of the spines 0.3.
Habitat.—North Atlantic, Færöe Channel, Gulf Stream (expedition of H.M.S "Triton," August, 1882), John Murray, surface.
2. Astrocapsa stellata, n. sp. (Pl. [133], fig. 10).
Aspinal holes cruciform, with high crenated margin. Four aspinal pores of each hole egg-shaped. Porules of the shell simple, without ring and dimple. Four edges of the spines denticulate; their outer free part twice to three times as long as the diameter of the shell.
Dimensions.—Diameter of the shell 0.36; outer length of the spines 0.5 to 0.8.
Habitat.—Antarctic Ocean (near Kerguelen), Station 152, surface.
3. Astrocapsa quadrifida, n. sp.
Aspinal holes four-lobed, with four prominent teeth between the four roundish aspinal pores. Porules of the shell surrounded by a high polygonal smooth ring. Four edges of the spines denticulate; their outer free part about as long as the radius of the shell.
Dimensions.—Diameter of the shell 0.28; outer length of the spines 0.15.