Habitat.—Central Pacific, Station 265, depth 2900 fathoms.
2. Gamospyris annulus, n. sp.
Shell nut-shaped, tuberculate, with subregular circular pores. Basal plate with four large central and a circle of eight to twelve small peripheral pores. Apical horn conical, twice as long as the shell. The connected arms form together an elliptical smooth ring, which is five times as long and three times as broad as the shell.
Dimensions.—Shell 0.07 long, 0.09 broad; ring 0.33 long, 0.26 broad.
Habitat.—Central Pacific, Station 268, depth 2900 fathoms.
Genus 450. Stephanospyris,[[68]] Haeckel, 1881, Prodromus, p. 441.
Definition.—Zygospyrida with two lateral feet bearing a series of secondary spines and forming a ring by union.
The genus Stephanospyris exhibits the same peculiar armature of the semipinnate lateral feet as its ancestral genus Dorcadospyris, but differs from it in the concrescence of the distal ends of the feet, to form a complete foot-ring. The former therefore bears to the latter the same relation that Gamospyris does to Dipospyris.
1. Stephanospyris cordata, n. sp. (Pl. [85], fig. 10).
Shell subspherical, tuberculate, with small regular circular pores. Basal plate with four larger pores. Apical horn cylindrical, three times as long as the shell, with three to four verticils of teeth. The connected feet form a heart-shaped ring, four times as long and three times as broad as the shell. Each foot bears on the outer convex edge four to six stout conical teeth, shorter than the shell. Distal ends crossed and prominent.