Dimensions.—Diameter of the shell 0.1, pores 0.006, bars 0.003.
Habitat.—North Atlantic, Station 353, depth 2965 fathoms.
7. Staurosphæra simonis, n. sp.
Haliomma with four spines, Bury, 1862, Polycystins of Barbados, pl. iv. fig. 4.
Shell thick walled, smooth, with regular, circular pores, of the same breadth as the bars; eight to ten on the quadrant. Four spines cylindrical, twice as long as the radius, five times as broad as one mesh.
Dimensions.—Diameter of the sphere 0.1, pores and bars 0.003.
Habitat.—Fossil in Barbados.
Subgenus 2. Staurosphærella, Haeckel.
Definition.—Pores regular, all of nearly equal size and similar form; surface covered with by-spines or accessory thorns.
8. Staurosphæra philippi, n. sp. (Pl. [15], fig. 6).