2. Amphisphæra uranus, n. sp.
Radial proportion of the three spheres = 4 : 2 : 1. Cortical shell thick walled, smooth, with regular, circular pores, three times as broad as the bars; ten to twelve on the half equator. Polar spines three-sided pyramidal, about as long as the diameter of the outer shell, twice as broad at the base as one pore.
Dimensions.—Diameter of the outer shell 0.12, middle 0.06, inner 0.03; pores of the cortical shell 0.012, bars 0.004; length of the polar spines 0.1, basal breadth 0.024.
Habitat.—Western Indian Ocean, Zanzibar, 2200 fathoms, Pullen.
3. Amphisphæra jupiter, n. sp.
Radial proportion of the three spheres = 10 : 3 : 2. Cortical shell thick walled, smooth, with regular, circular pores, twice as broad as the bars; twenty to twenty-five on the half equator. Polar spines cylindro-conical, nearly as long as the axis of the outer shell, twice as broad at the base as one pore.
Dimensions.—Diameter of the outer shell 0.2, middle 0.06, inner 0.04; pores of the cortical shell 0.01, bars 0.005; length of the polar spines 0.15 to 0.18, breadth 0.02.
Habitat.—South Atlantic, Station 332, depth 2200 fathoms.
Subgenus 2. Amphisphærella, Haeckel.
Definition.—Pores of the cortical shell regular, of nearly equal size and similar form; surface thorny or spiny.