Habitat.—Fossil in Tertiary rocks of Sicily; Grotte, Caltanisetta.
6. Lithocampe fusiformis, n. sp.
Shell smooth, spindle-shaped, decreasing uniformly towards the two blunt poles, with eight or nine sharp strictures, and nine or ten joints of equal lengths, each with four transverse rows of regular, hexagonal pores. The fourth and fifth joints are the broadest. The constricted mouth is twice as broad as the hemispherical cephalis, half as broad as the fourth joint.
Dimensions. —Length of the shell (with ten joints) 0.2, of each joint 0.02; breadth of the fourth joint 0.06, mouth 0.03.
Habitat.—Central Pacific, Station 271, depth 2425 fathoms.
Subgenus 2. Lithocampium, Haeckel, 1881, Prodromus, p. 437.
Definition.—The joints of the shell are very different in length.
7. Lithocampe ovata, n. sp. (Pl. [77], fig. 1).
Shell smooth, urceolate or ovate, with three sharp strictures. Four joints of different lengths, having the proportion 1 : 2 : 2 : 6. The fourth joint is inflated and the broadest. The mouth is constricted, short, tubular, of the same breadth as the hemispherical cephalis. Pores small, circular, in regular transverse rows; four rows in the first, four in the second, two in the third, and five in the fourth joint. The middle stricture is crossed by longitudinal ribs.
Dimensions.—Length of the shell (with four joints) 0.11. Length of the single joints, a 0.01, b 0.02, c 0.02, d 0.06; greatest breadth 0.055.