Shell nut-shaped, with slight sagittal stricture, studded with ten to twelve longer club-shaped spines (about as long as the shell) and numerous smaller conical spines. Pores irregular, roundish, numerous; two pairs of larger pores on each side of the ring. Basal plate with four large pores. Bars of the network rounded. Dedicated to my honoured friend and colleague, the celebrated investigator of psychical ontogeny, Professor William Preyer, of Jena.
Dimensions.—Shell 0.07 long, 0.09 broad; spines 0.02 to 0.08 long.
Habitat.—South Atlantic, Station 332, depth 2200 fathoms.
9. Ceratospyris echinus, Ehrenberg.
Ceratospyris echinus, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 66, Taf. xx, fig. 12.
Shell subspherical, with slight sagittal stricture, studded with numerous conical curved spines; six basal and one apical spine are larger than the others, about as long as the shell. Pores numerous, small, circular. Basal plate with numerous pores. Bars of the network roundish.
Dimensions.—Shell 0.05 long, 0.06 broad; spines 0.02 to 0.05 long.
Habitat.—Fossil in Barbados.
Subgenus 2. Cladospyris, Ehrenberg, 1847, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 54.
Definition.—Spines forked or branched. Meshes roundish or polygonal.