Habitat.—Fossil in Barbados.
5. Lithomelissa pycnoptera, n. sp.
Shell rough, papillate, with slight collar stricture. Relative length of the two joints = 1 : 3, breadth = 1 : 3. Cephalis small, hemispherical, with very small pores and a slender, straight, conical horn of twice the length. Thorax subconical, with regular circular, hexagonally framed pores, as broad as the bars. From its lower half arise three divergent, very strong feet, pyramidal, as long as the thorax, and three times as long as broad.
Dimensions.—Cephalis 0.03 diameter, thorax 0.1 diameter.
Habitat.—Central Pacific, Station 265, depth 2900 fathoms.
6. Lithomelissa microstoma, n. sp.
Shell papillate, with slight collar stricture. Relative length of the two joints = 1 : 5, breadth = 1 : 5. Cephalis small, hemispherical, with a conical horn of twice the length. Thorax subspherical, with subregular circular pores, three times as broad as the bars. From its middle part arise three divergent, stout, conical feet, of half the length, and twice as long as broad. Mouth small, strongly constricted, one-fourth to one-third as broad as the thorax.
Dimensions.—Cephalis 0.03 long, 0.04 broad; thorax 0.15 diameter.
Habitat.—Fossil in Barbados.
7. Lithomelissa amphora, Stöhr.