Habitat.—Pacific, central area, Station 273, depth 2350 fathoms.
2. Spongolena spongura, n. sp.
Arms nearly cylindrical, twice as long as broad, and a little longer than the diameter of the elliptical central disk. Surface thorny, some longer bristle-shaped spines on the distal end of the arms. (Very similar to the ellipsoid Spongurus cylindricus, Monogr. d. Radiol., p. 465, Taf. xxvii. fig. 1, but differs in the compressed lenticular (not ellipsoidal) form of the central disk; the transverse section of the arm is elliptical, not circular.)
Dimensions.—Radius of the arms 0.1, breadth 0.04.
Habitat.—Pacific, central area, Station 270, depth 2925 fathoms.
3. Spongolena cypselura, n. sp.
Arms nearly triangular, not longer than broad, about half as large as the elliptical central disk, at the broader distal end with two very large, widely divergent lateral spines, and between them several smaller, like the tail of a swallow. Surface thorny.
Dimensions.—Radius of the arms 0.2, distal breadth (without spines) 0.15, basal breadth 0.07.
Habitat.—Pacific, central area, Station 272, depth 2600 fathoms.