Dimensions.—Main axis (without spines) 0.18, greatest breadth 0.13; pores 0.003 to 0.008, bars 0.002; length of the polar spines 0.16, basal thickness 0.03.
Habitat.—South Pacific, Station 295, depth 1500 fathoms.
Subgenus 2. Cyphinura, Haeckel.
Definition.—On both poles of the main axis a bunch or circle of several spines.
3. Cyphinus amphilophus, n. sp. (Pl. [39], fig. 14).
Cyphinidium amphilophus, Haeckel, 1882, Atlas (pl. xxxix. fig. 14).
Cortical shell thick walled, with rough surface, and subregular, circular pores of different size, twice to five times as broad as the bars; nine to ten pores on the half meridian of each chamber, twelve to fourteen on its half equator. On both poles of the main axis a bunch of six to eight strong conical spines, the largest of which are about as long as the greatest breadth of the shell; their basal part is furrowed, and nearly half as thick as the spherical medullary shell.
Dimensions.—Main axis of the cortical shell (without spines) 0.18 to 0.2, greatest breadth 0.1 to 0.12; pores 0.004 to 0.01, bars 0.002; length of the polar spines 0.04 to 0.12, basal thickness 0.02 to 0.04.
Habitat.—Pacific, central area, Station 271, depth 2425 fathoms.
4. Cyphinus penicillatus, Haeckel.