Dimensions.—Diameter of the shell 0.15, pores 0.004 to 0.01, bars 0.002.
Habitat.—North Pacific, Station 253, depth 3125 fathoms.
Genus 61. Staurostylus,[[84]] Haeckel, 1881, Prodromus, p. 450.
Definition.—Staurosphærida with one single lattice-sphere and four crossed spines which are arranged in opposite pairs, one pair opposite being larger than the other.
The genus Staurostylus has been developed from Staurosphæra by differentiation of the four crossed spines in pairs; two opposite spines growing much more strongly than the other two.
1. Staurostylus græcus, n. sp.
Shell thick walled, smooth, with regular, circular, hexagonally framed pores, twice as broad as the bars; six to eight on the quadrant. Spines three-sided prismatic, pointed, as broad as one mesh; two opposite larger spines as long as the diameter of the shell, two smaller only as long as the radius.
Dimensions.—Diameter of the shell 0.15, pores 0.01, bars 0.005; length of the major spines 0.16, minor 0.08.
Habitat.—Central Pacific, Station 274, depth 2750 fathoms.
2. Staurostylus latinus, n. sp.