Apophyses of the long compressed radial spines simple, conical, about as long as their distance from the shell. At the base of each spine (in the outer shell) two elliptical aspinal pores, two to three times as large as the other pores.
Dimensions.—Diameter of the outer shell 0.1, of the inner 0.044.
Habitat.—North Pacific, Station 238, surface.
2. Dorypelta gladiata, n. sp.
Apophyses of the long cylindrical radial spines simple, triangular, about half as long as their distance from the shell. At the base of each spine (in the outer shell) four crossed aspinal pores, the two opposite of which are much larger than the other two pores.
Dimensions.—Diameter of the outer shell 0.09, of the inner 0.04.
Habitat.—Central Pacific, Station 266, surface.
Subgenus 2. Dorypeltidium, Haeckel.
Definition.—Free apophyses of the radial spines branched, with free (not anastomosing) branches.
3. Dorypelta furcata, n. sp.