27. Hexalonche setosa, n. sp.
Cortical shell thin walled, covered with numerous bristle-shaped spines, half as long as the six main spines. Pores irregular roundish, twice to five times as broad as the bars; ten to twelve on the radius. Inner shell equal to one-fifth of the outer. Six spines conical, as long as the radius.
Dimensions.—Diameter of the outer shell 0.25, pores 0.008 to 0.02, bars 0.004; inner shell 0.05; length of the spines 0.12, basal breadth 0.03.
Habitat.—South Pacific, Station 291, surface.
28. Hexalonche hystricina, n. sp. (Pl. [25], fig. 6).
Cortical shell thick walled, covered with numerous bristle-shaped spines, half as long as the six main spines. Pores irregular roundish, twice to four times as broad as the bars; five to seven on the radius. Medullary shell with very small circular pores, one-fourth of the cortical shell, connected with it by six thin prismatic radial beams, which are prolonged outside into six strong, short, three-sided pyramidal, cuspidated spines, only half as long as the radius of the outer shell.
Dimensions.—Diameter of the outer shell 0.2, pores 0.015 to 0.03, bars 0.008; inner shell 0.05; length of the spines 0.05, basal breadth 0.02.
Habitat.—Indian Ocean, Sunda Strait, surface, Rabbe.
Genus 76. Hexancistra,[[106]] Haeckel, 1881, Prodromus, p. 451.
Definition.—Cubosphærida with two concentric lattice-spheres and six branched spines of equal size.