7. Stauracantha pinnulata, n. sp.
Spines four-winged pyramidal, with prominent edges, simple apex and large basal leaf-cross, in the middle with doubly pinnate triangular apophyses. Each apophysis is crossed at right angles by three to four transverse parallel rods, which bear again perpendicular secondary branches; the outline of the doubly pinnate apophysis is an isosceles triangle.
Dimensions.—Length of the spines 0.3, middle breadth 0.02; distance of the apophyses 0.12.
Habitat.—North Pacific, Station 244, surface.
Subgenus 2. Stauracanthidium, Haeckel.
Definition.—Apophyses of the radial spines forked, each with two divergent terminal branches, which are not parallel to the cross axes of the quadrangular spine.
8. Stauracantha stauraspis, Haeckel.
Dorataspis polyancistra, juvenis, Haeckel, 1862, Monogr. d. Radiol., p. 418, Taf. xxi. fig. 7.
Spines slender, quadrangular prismatic, with simple apex and pyramidal base (without basal leaf-cross); with four slender apophyses, which are simply forked in the outer third. Each apophysis with two recurved fork branches.
Dimensions.—Length of the spines 0.12, breadth 0.004; distance of the apophyses 0.06.