Habitat.—North Pacific, Station 254, surface.
28. Cenosphæra perforata, n. sp. (Pl. [26], fig. 10).
Ceriosphæra perforata, Haeckel, 1881, Prodromus et Atlas, loc. cit.
Shell thick walled, rough. Pores irregular, roundish, surrounded by high polygonal funnel-shaped frames, which are solid in the inner half, perforated by numerous very small pores in the outer half, sieve-shaped. Pores one to three times as broad as the bars, of very different size, four to six on the quadrant.
Dimensions.—Diameter of the shell 0.15, pores 0.01 to 0.02, bars 0.005 to 0.01.
Habitat.—Tropical Atlantic, Station 347, depth 2250 fathoms.
29. Cenosphæra coronata, n. sp. (Pl. [26], fig. 11).
Shell thick walled, rough. Pores irregular, roundish, surrounded by high polygonal frames bearing on their sharp crest a series of small papillæ, so that each pore is surrounded by a coronal of such spinules. Pores four to eight times as broad as the bars, four to five on the quadrant.
Dimensions.—Diameter of the shell 0.15, pores 0.01 to 0.03, bars 0.002 to 0.008.
Habitat.—Central Pacific, Station 272, depth 2600 fathoms.