3. Carpocanistrum giganteum, n. sp.
Shell ovate, smooth, very thick-walled, one and a third times as long as broad. Pores very numerous and small, subregular circular, forty to fifty on the greatest breadth of the shell, of about the same breadth as the bars. Peristome small, constricted, scarcely one-fourth as broad as the shell, with twelve to fifteen short triangular vertical feet.
Dimensions.—Shell 0.28 to 0.31 long, 0.21 to 0.23 broad; mouth 0.06 to 0.07 broad.
Habitat.—Fossil in Barbados.
4. Carpocanistrum acephalum, n. sp. (Pl. [52], fig. 10).
Shell ovate, smooth, thin-walled, one and a fifth times as long as broad. Pores subregular circular, twice as broad as the bars, sixteen to twenty on the greatest breadth of the shell. Peristome slightly constricted, with fifteen to eighteen slender, slightly bent, nearly vertical, and parallel feet, which are half as long as the shell.
Dimensions.—Shell 0.12 long, 0.1 broad; mouth 0.07 broad.
Habitat.—North Pacific, Station 241, depth 2300 fathoms.
5. Carpocanistrum evacuatum, n. sp. (Pl. [52], fig. 11).
Shell urceolate, smooth, thin-walled, one and a half times as long as broad. Pores regular circular, sixteen to twenty on the greatest breadth of the shell. Peristome slightly constricted, with twenty to twenty-five small triangular vertical feet.