Radial spines slender, verticillate, three or four divergent arising from each nodal point of the surface. Each spine bears three to six cruciate verticils of lateral branches; each verticil being composed of four crossed small branches with a spinulate terminal knob. Bars of the spongy framework partly covered with similar verticils.
Dimensions.—Diameter of the sphere 2.0 to 3.0, length of the bars 0.2 to 0.3, breadth 0.002 to 0.003.
Habitat.—North Pacific, Stations 240 to 244, surface.
4. Sagmidium quadricorne, n. sp. (Pl. [108], fig. 12).
Radial spines stout, smooth, cylindrical, usually four divergent arising from each nodal point of the surface (sometimes three, five, or six, instead of four). Each spine bears on its distal end a club-shaped stellate knob. Bars of the spongy framework smooth.
Dimensions.—Diameter of the sphere 4.5, length of the bars 0.2 to 0.3, breadth 0.003 to 0.005.
Habitat.—South Pacific, Station 293, depth 2025 fathoms.
5. Sagmidium multicorne, n. sp.
Radial spines slender, more or less curved, verticillate, in variable number (three to six) divergent, arising from the nodal points of the surface. The spines as well as the bars of the spongy framework are partly simple, partly covered with irregularly scattered cruciate verticils, very similar to those of Sagmarium trigonizon (or Dictyosoma trigonizon), figured in my Monograph, pl. xxvi. figs. 4, 5.
Dimensions.—Diameter of the sphere 5.0, length of the bars 0.2 to 0.3, breadth 0.003.