Shell spiny, with three broad internal annular septa. Three of the four joints are nearly equal in length, each being three times as long as the first. Cephalis subspherical, with a conical horn of twice the length. The second and third joints are together nearly ellipsoidal, and are not separated externally. The fourth joint is separated from them by a deep stricture, one and a half times as broad, and flatly conical. Pores subregular, circular, hexagonally framed. Peristome with a coronal of twenty to thirty strong, conical, divergent feet.
Dimensions.—Length of the shell 0.22, basal breadth 0.16. Length of the single joint, a 0.02, b 0.06, c 0.06, d 0.08.
Habitat.—Central Pacific, Station 265, depth 2900 fathoms.
Subgenus 2. Cyrtocorys, Haeckel, 1881, Prodromus, p. 438.
Definition.—Shell with four or more transverse strictures, and five or more joints.
5. Phormocampe mitra, n. sp.
Shell broadly campanulate, conical, about as broad as long, with five internal annular septa. Length of the six joints gradually increasing. Cephalis flat, cap-shaped, with a short, bristle-shaped, conical horn. Pores small and numerous, regular, hexagonal, with thin bars. Peristome with a coronal of forty to fifty divergent, bristle-shaped feet, about as long as the last joint.
Dimensions.—Length of the shell (with six joints) 0.16, of the last joint 0.05; breadth 0.18.
Habitat.—North Pacific, Station 235 (off Japan), surface.
6. Phormocampe conus, n. sp.