13. Gazelletta robusta, n. sp. (Pl. [120], fig. 14).
Shell flat, cap-shaped, thorny. Feet cylindrical, very stout, slightly curved, covered with short irregularly branched spines; their ends with a bunch of similar spines.
Dimensions.—Diameter of the shell 0.6, length of the feet 2.5 to 3.3.
Habitat.—Central Pacific, Stations 263 to 274, surface.
Subgenus 4. Gazellusium, Haeckel.
Definition.—Feet spiny, armed with simple or branched lateral spines, and with larger terminal branches of a different shape.
14. Gazelletta dendronema, n. sp. (Pl. [120], fig. 16).
Shell hemispherical, thorny, with a broad, alveolate velum which bears irregular hollow thorns on the inside and on the free margin (fig. 16). Feet divergent, irregularly curved, with scattered arborescent lateral spines, which are irregularly branched, and bear at the distal end of each branch a small spathilla with four to six teeth. The distal ends of the feet are dichotomously branched, with stouter simple fork-branches.
Dimensions.—Length of the shell 0.17, breadth 0.36; length of the feet 0.5 to 0.7.
Habitat.—North Pacific, Station 252, surface.