8. Heliosphæra cristata, n. sp.
Shell thick walled, about twelve times as broad as one mesh. Pores subregular, circular, twice as broad as the bars; each pore surrounded by an elegant coronal of ten to twenty small, conical by-spines; twenty main spines regularly disposed, conical, only one-third as long as the radius, as broad at the base as one mesh.
Dimensions.—Diameter of the shell 0.25, pores 0.02, bars 0.01; length of the main spines 0.04, basal breadth 0.02.
Habitat.—South Pacific, Station 285, depth 2375 fathoms.
9. Heliosphæra castanella, n. sp.
Shell thick walled, about twenty times as broad as one mesh. Pores regular, circular, of the same breadth as the bars. Whole surface densely covered with innumerable bristle-shaped by-spines, half as long as the radius; fifty to eighty main spines, conical, nearly as long as the diameter, twice as broad at the base as one pore. (Very similar to some species of Castanella, Pl. [113], but without the osculum characteristic of this Phæodarian; may be easily confounded with it.)
Dimensions.—Diameter of the shell 0.3, pores 0.015, bars 0.015; length of the main spines 0.25, basal breadth 0.03.
Habitat.—North Pacific (Japan), Station 234, surface.
Subgenus 2. Heliosphæromma, Haeckel.
Definition.—Pores of the shell irregular, of different size or form.