4. Xiphostylus gallus, n. sp.
Pores regular, circular, five times as broad as the bars. Twelve to sixteen pores on the half equator. Surface smooth. Polar spines very unequal; the major conical spine one and a half to three times as long as the diameter of the sphere; the minor pommel-shaped, scarcely one-third as long (length of both spines very variable).
Dimensions.—Diameter of the sphere 0.13, pores 0.01, bars 0.002; length of the major spine 0.2 to 0.4, of the minor 0.05 to 0.08.
Habitat.—Pacific, central area, Station 268, depth 2900 fathoms.
5. Xiphostylus alauda, n. sp. (Pl. [14], fig. 15).
Lithomespilus alauda, Haeckel, 1881, Prodrom. et Atlas, loc. cit.
Pores subregular, circular, three to four times as broad as the bars; fifteen to eighteen on the half equator. Surface a little rough. Polar spines irregularly conical or pyramidal, scarcely as long as the radius of the sphere; one spine simple, the other composed of a bunch of four or five spines united at the base.
Dimensions.—Diameter of the sphere 0.11, pores 0.01, bars 0.003; length of the polar spines 0.03 to 0.05, basal breadth 0.02.
Habitat.—Pacific, central area, Station 272, depth 2600 fathoms.
6. Xiphostylus anhinga, Haeckel.