Habitat.—Central Pacific, Station 272, depth 2600 fathoms.
2. Liosphæra rhodococcus, n. sp.
Both shells with the same number of pores, exactly corresponding, about twelve on the quadrant. All pores regular or subregular; the inner circular, with elegant six-lobed frames, twice as broad as the bars; the outer hexagonal, with very thin thread-like bars. All corners of the outer and inner hexagons connected by thin, bristle-shaped radial beams. (Similar to Haliomma rhodococcus, Pl. [19], fig. 6; but with smooth surface and regular hexagonal pores of the outer shell.)
Dimensions.—Diameter of the outer shell 0.2, inner 0.16, distance of both 0.02; outer pores 0.03, inner 0.01.
Habitat.—Central Pacific, Station 266, depth 2750 fathoms.
3. Liosphæra porulosa, n. sp.
Both shells with regular hexagonal pores; their number in the outer shell seven times as great as in the inner. Pores of the stout inner shell large, three times as broad as the bars, about eight on the quadrant. From each hexagon-corner arises one bristle-shaped radial beam; their distal ends are united by threads (three from each), forming the large meshes of the delicate outer shell. Each of these is divided by very thin threads into seven small circular porules, one central and six around it.
Dimensions.—Diameter of the outer shell 0.25, inner 0.2, distance of both 0.025; outer pores 0.04, their porules 0.012, inner pores 0.15.
Habitat.—Indian Ocean, Sunda Strait, Rabbe; surface.