Habitat.—North Pacific, Station 244, surface.
3. Saturnulus ellipticus, n. sp. (Pl. [16], fig. 16).
Cortical shell smooth, three times as broad as the medullary shell, with regular, circular pores, three times as broad as the bars; sixteen to eighteen on the half equator. Ring elliptical, smooth, without edges, its major diameter three times as great as that of the sphere.
Dimensions.—Diameter of the outer sphere 0.09, pores 0.006, bars 0.002; inner sphere 0.03; major axis of the elliptical ring 0.28, minor 0.24; thickness of the ring and the axial beams 0.008.
Habitat.—South Pacific, Station 300, surface.
4. Saturnulus planetes, n. sp. (Pl. [16], fig. 17).
Cortical shell smooth, twice as broad as the medullary shell, with regular, circular pores, of the same breadth as the bars; sixteen to eighteen on the half equator. Ring elliptical, smooth, with strong prominent edges, constricted at the poles of the minor axis, its major diameter three times as great as that of the outer sphere.
Dimensions.—Diameter of the outer sphere 0.08, pores and bars 0.005; inner sphere 0.035; major axis of the ring 0.25, minor axis 0.2; thickness of the ring and the axial beams 0.012.
Habitat.—Indian Ocean, Sunda Strait, Rabbe; Station 200, surface.