Shell cylindrical, with hemispherical, flatly vaulted cephalis. Length of the two joints = 1 : 4, breadth = 3 : 3. Pores regular, circular, double-contoured, as broad as the bars, in about fifteen longitudinal series. Mouth constricted, two-thirds as broad as the thorax. Peristome with nine vertical, slender, triangular, pointed feet.
Dimensions.—Cephalis 0.02 long, 0.06 broad; thorax 0.08 long, 0.06 broad.
Habitat.—Central Pacific, Station 271, depth 2425 fathoms.
7. Carpocanium enneaphyllum, n. sp.
Shell slenderly ovate, at the mouth truncate, thorny, with hemispherical, vaulted cephalis. Length of the two joints = 1 : 6, breadth = 2 : 4. Pores regular, circular, hexagonally framed, as broad as the bars, in about thirteen longitudinal rows. Mouth constricted, about two-thirds as broad as the thorax. Peristome with nine broad, lamellar, vertical, nearly square feet, half as long as the shell, with small intervals.
Dimensions.—Cephalis 0.02 long, 0.04 broad; thorax 0.12 long, 0.09 broad.
Habitat.—South Atlantic, Station 332, depth 2200 fathoms.
8. Carpocanium solitarium, Ehrenberg.
Carpocanium solarium, Ehrenberg, 1854, Mikrogeol., Taf. xxii. fig. 28.
Lithocampe solitaria, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 65.