Sagittal ring ovate, thorny, with eight pairs of pores. The four apical and the four basal pores are elliptical and far larger than the four dorsal and the four ventral pores. Resembles a Dictyospyris with open lateral gates.
Dimensions.—Height of the sagittal ring 0.08, breadth 0.06.
Habitat.—Central Pacific, Station 272, depth 2600 fathoms.
6. Clathrocircus multiforis, n. sp. (Pl. [92], fig. 10).
Sagittal ring circular, smooth, with ten to twelve pairs of roundish pores, forming together a complete lattice-girdle with two parallel circular rows of pores. Four larger of these are the four gates of the basal ring (two jugular and two cardinal pores).
Dimensions.—Diameter of the ring 0.1 to 0.15, breadth 0.03 to 0.05.
Habitat.—Central Pacific, Stations 263 to 274, depth 2350 to 2925 fathoms.
Subfamily 2. Cortiniscida, Haeckel.
Definition.—Semantida with large, typical, regularly disposed basal feet (originally three cortinar feet, one odd caudal and two paired pectoral).