Habitat.—Fossil in Barbados.
Subgenus 2. Tristylospyrium, Haeckel.
Definition.—Feet forked or branched.
5. Tristylospyris furcata, n. sp.
Shell subspherical, rough, with slight sagittal stricture. Pores subregular circular. Basal plate with three large collar pores. Feet cylindrical, three to four times as long as the shell, strongly curved and divergent, at the distal end forked, with two short (sometimes ramified) branches.
Dimensions.—Cephalis 0.08 long, 0.09 broad; feet 0.2 to 0.3 long.
Habitat.—South Atlantic (off Patagonia), Station 318, surface.
6. Tristylospyris ramosa, n. sp. (Pl. [52], fig. 23).
Shell subspherical, tuberculate, with a prominent sagittal ring. Pores irregular roundish. Basal plate with three large pores. Feet large, straight, widely divergent, about twice as long as the shell, prismatic, irregularly branched. (Compare the following species.)
Dimensions.—Shell 0.08 in diameter; feet 0.15 long.