Habitat.—North Pacific, Station 244, depth 2900 fathoms.
14. Thecosphæra maxima, n. sp.
Cortical shell thin walled, with small irregular roundish pores, two to six times as broad as the bars. Both medullary shells with similar, but smaller, pores. Radial proportion of the three spheres = 1 : 3 : 9; they are connected by numerous (forty to sixty or more) thin radial beams.
Dimensions.—Diameter of the outer shell 0.45, middle 0.15, inner 0.05; cortical pores 0.008 to 0.024, bars 0.004.
Habitat.—Central Pacific, Station 272, depth 2600 fathoms.
Genus 22. Rhodosphæra,[[35]] Haeckel, 1881, Prodromus, p. 452.
Definition.—Liosphærida with one medullary (intracapsular) shell and two cortical (extracapsular) shells.
The genus Rhodosphæra differs from the preceding Thecosphæra in the same manner in which, among the Dyosphærida, Liosphæra differs from Carposphæra. The cortical shell is double, composed of two not far distant shells, lying outside the central capsule. The distance between the shells is much smaller than the radius of the inner shell. This is connected by radial beams (piercing the central capsule) with the small central medullary shell.
Subgenus 1. Rhodosphærella, Haeckel.
Definition.—Pores of both cortical shells regular, in each shell all of nearly equal size and form.