Habitat.—Central Pacific, Station 265, depth 2900 fathoms; also fossil in Barbados.
4. Halicalyptra novena, n. sp.
Shell smooth, campanulate. Pores irregular, roundish. Horn slender conical, about as long as the shell. Peristome slightly constricted, with nine slender divergent feet of the same length. (Very similar to Petalospyris foveolata, Ehrenberg, but without internal columella and ring, with perfectly simple shell-cavity and open mouth.)
Dimensions.—Shell 0.09 diameter, feet 0.1 long.
Habitat.—Fossil in Barbados.
5. Halicalyptra petalospyris, n. sp. (Pl. [98], fig. 12).
Shell smooth, campanulate. Pores small, circular, irregularly scattered. Horn stout, pyramidal, about as long as the shell. Peristome scarcely constricted, with fifteen to twenty broad lamellar or lanceolate feet, which are twice to three times as long as the shell, parallel and vertical. (Very similar to Petalospyris flabellum, &c., Ehrenberg, 1875, loc. cit., Taf. xxii. figs. 6-8, but without any trace of sagittal ring or columella.)
Dimensions.—Shell 0.05 to 0.08 diameter, feet 0.15 to 0.25 long.
Habitat.—Central Pacific, Stations 266 to 268, depth 2700 to 2900 fathoms.