Dimensions.—Diameter of the shell 0.12, of the aspinal pores 0.01, of the sutural pores 0.004.
Habitat.—Tropical Atlantic, Station 338, surface.
8. Hystrichaspis divaricata, n. sp.
Shell with numerous (two hundred to three hundred?) funnel-shaped dimples, the majority of which are blind, the minority perforated; among the latter there are forty larger aspinal pores. Crests between the dimples armed with long forked by-spines with divergent fork-branches. Radial spines cylindrical, very long and thick, longer than the diameter of the shell.
Dimensions.—Diameter of the shell 0.14, aspinal pores 0.08, sutural pores 0.03.
Habitat.—Central Pacific, Station 266, surface.
9. Hystrichaspis fruticata, n. sp. (Pl. [138], fig, 7).
Shell with numerous (one hundred and fifty to two hundred?) funnel-shaped dimples, the majority of which are blind, the minority perforated; forty aspinal pores elliptical, of the same size as the circular sutural pores. Crests between the dimples bearing elegant arborescent by-spines. Twenty radial main-spines long and thin, cylindrical or a little compressed.
Dimensions.—Diameter of the shell 0.17, pores 0.01.
Habitat.—Tropical Pacific, Station 275, surface.