Dimensions.—Shell 0.08 long, 0.09 broad; horn and feet 0.07 to 0.12 long.
Habitat.—Central Pacific, Station 265, depth 2900 fathoms.
Subgenus 2. Cladocorona, Haeckel, 1881, Prodromus, p. 430.
Definition.—Feet branched or forked.
6. Calpophæna tetracorethra, n. sp.
Shell subspherical, smooth, with irregular, roundish pores. Basal plate with four larger pores. Apical horn and the four divergent basal feet of equal size and similar form, three to four times as long as the shell, slender, bristle-shaped, curved, in the distal half irregularly branched. (Very similar to the remarkable Tetraspyris tetracorethra, Pl. [53], figs. 19, 20, but with shorter appendages and with simple spherical shell, which exhibits no trace of sagittal ring and constriction.)
Dimensions.—Shell 0.12 diameter, horn and feet 0.3 to 0.5 long.
Habitat.—Central Pacific, Station 271, depth 2425 fathoms.
7. Calpophæna hexacorethra, n. sp.
Shell subspherical, smooth, similar to the preceding species. Basal plate with six pores. Apical horn and the six divergent feet twice to three times as long as the shell, bristle-shaped, irregularly curved and branched. (Similar to Hexaspyris hexacorethra, Pl. [95], fig. 8, but without sagittal ring and constriction.)