6. Heliosoma indicum, n. sp.
Cortical shell thick walled, with irregular, roundish pores, twice to five times as broad as the bars. Medullary shell of the same structure, only one-fourth as large. Thirty to forty conical main spines, as long as the radius; between them numerous bristle-shaped by-spines, only half as long.
Dimensions.—Diameter of the outer shell 0.2, inner 0.05; outer pores 0.004 to 0.01, bars 0.002; length of the main spines 0.1, breadth 0.01.
Habitat.—Indian Ocean, between Aden and Socotora, surface, Haeckel.
Genus 96. Elatomma,[[131]] n. gen.
Definition.—Astrosphærida with one medullary (intracapsular) and one cortical (extracapsular) shell, the two being connected by radial beams piercing the central capsule. Shell surface covered with branched radial spines.
The genus Elatomma differs from Haliomma in the ramification of the radial spines, and exhibits therefore the same relation to it that Cladococcus, among the Coscinommida, bears to Acanthosphæra.
Subgenus 1. Elatommella, Haeckel.
Definition.—Pores of the cortical shell regular, of nearly equal size and similar form.
1. Elatomma pinetum, n. sp.