Habitat.—Central Pacific, Station 272, surface.
3. Lonchostaurus bifidus, n. sp.
Four equatorial spines compressed, nearly rectangular, forked, with two long and thin, bent, little divergent horns; the two opposite spines of the longitudinal axis about one-third longer and broader than those of the transverse axis. Sixteen smaller spines of the same form, also forked, but the eight tropical only half as large, and the eight polar spines scarcely one-fourth as large as the two longitudinal spines.
Dimensions.—Length of the equatorial cross 0.36, breadth 0.26.
Habitat.—South-west Pacific, Station 166, surface.
4. Lonchostaurus bifurcus, n. sp. (Pl. [131], fig. 4).
Four equatorial spines nearly rhomboidal, about one and a half times as large as the eight tropical and three times as large as the eight polar spines; the two opposite spines of the longitudinal axis only with two large divergent straight horns; the two spines of the transverse axis somewhat shorter, with four short horns (the two outer horns longer than the two inner). Eight tropical spines doubly forked, each with four thin bristle-shaped horns. Eight polar spines very short, each with two thin bristle-shaped, much divergent horns.
Dimensions.—Length of the equatorial cross 0.34, breadth 0.28.
Habitat.—North-west Pacific, Station 236, surface.
5. Lonchostaurus rhombicus, n. sp.