10. Carposphæra belladonna, n. sp.
Cortical shell thick walled, smooth, five times as broad as the medullary shell, with regular circular pores of the same breadth as the bars. Twenty to twenty-two pores on the quadrant.
Dimensions.—Diameter of the outer shell 0.3, inner 0.06, outer pores and bars 0.004.
Habitat.—North Atlantic, Færöe Channel, John Murray.
11. Carposphæra areca, n. sp.
Cortical shell very thick walled, rough, twice as broad as the medullary shell, with regular circular pores half as broad as the bars. Eight to ten pores on the quadrant.
Dimensions.—Diameter of the outer shell 0.12, inner 0.06, outer pores 0.03, bars 0.006.
Habitat.—Indian Ocean, Ceylon, Haeckel, surface.
Subgenus 3. Prunosphæra, Haeckel, 1881, Prodromus, p. 451.
Definition.—Pores of the cortical shell irregular polygonal, of unequal size or dissimilar form.