27. Haliomma antarcticum, n. sp.
Cortical shell very thin walled, three times as broad as the medullary shell, with irregular, polygonal pores, and very thin thread-like bars. Inner shell with regular, hexagonal meshes, six times as broad as the bars. About forty radial spines, angular, pyramidal, half as long as the radius of the shell, as broad at the base as the largest mesh.
Dimensions.—Diameter of the outer shell 0.2, of the inner 0.07; outer pores 0.006 to 0.015, inner 0.008; length of the spines 0.05, basal breadth 0.012.
Habitat.—Antarctic Ocean, Station 154, surface.
28. Haliomma wyvillei, Haeckel.
Haliomma wyvillei, Haeckel, 1878, Protistenreich, p. 44, fig. 31.
Haliomma species, Wyville Thomson, 1877, Atlantic, vol. i. p. 236, fig. 54.
Cortical shell thin walled, three times as broad as the medullary shell. Both shells with irregular, large, polygonal pores, and very thin bars. From the inner shell arise very numerous (eighty to one hundred and twenty or more) radial spines, which pierce the outer shell, and are outside it, as long as the radius of the inner shell, straight, bristle-shaped, and as thick as the bars.
Dimensions.—Diameter of the outer shell 0.18, of the inner 0.06; pores 0.01 to 0.02, bars 0.001 to 0.002; length of the free spines 0.06.
Habitat.—Central Pacific, Stations 266 to 274, surface.