1. Spongolonchis compacta, n. sp.
Spongy framework of the spherical shell very compact, with small meshes, three to four times as broad as the bars. Surface rough, but not spiny. Two polar spines pyramidal, only as long as the radius of the shell, one-third as broad at the base.
Dimensions.—Diameter of the shell 0.2; length of the spines 0.1, basal breadth 0.03.
Habitat.—Central Pacific, Station 274, depth 2750 fathoms.
2. Spongolonchis laxa, n. sp.
Spongy framework loose, with large meshes, ten to twelve times as broad as the bars. Surface spiny. Two polar spines three-sided prismatic, longer than the diameter of the shell (broken off in the observed specimen).
Dimensions.—Diameter of the shell 0.5; length of the spine 0.6 and more, breadth 0.02.
Habitat.—Central Pacific, Station 265, depth 2900 fathoms.
Genus 58. Spongostylus,[[80]] Haeckel, 1881, Prodromus, p. 455.
Definition.—Stylosphærida with spongy spherical cortical shell, enclosing in the centre a simple latticed medullary shell, and with two opposite free radial spines.