15. Aulosphæra bifurca, n. sp.
Radial tubes cylindrical, straight, thorny, twice as long as the smooth, cylindrical, tangential tubes, forked at the distal end, with two curved, convergent, thorny, terminal branches. (Similar to Aulastrum dendroceros, Pl. 111, figs. 4a-4c, but with longer and more spinulate branches.)
Dimensions.—Diameter of the sphere 3.2; tangential tubes 0.25 long, 0.01 broad.
Habitat.—North Pacific, Station 239, surface.
16. Aulosphæra trifurca, n. sp. (Pl. 109, fig. 9).
Radial tubes cylindrical, straight, thorny, about as long as the smooth, cylindrical, tangential tubes, forked at the distal end, with three curved, convergent, terminal branches.
Dimensions.—Diameter of the sphere 2.5 to 3.0; tangential tubes 0.2 long, 0.01 broad.
Habitat.—North Pacific, Station 240, surface.
17. Aulosphæra quadrifurca, n. sp.
Radial tubes cylindro-conical, straight, about as long as the smooth, cylindrical, tangential tubes; studded with numerous irregular lateral branches in the distal half, and armed at the distal end with a cross of four divergent, forked, terminal branches.
Dimensions.—Diameter of the sphere 4.2; tangential tubes 0.2 long, 0.01 broad.
Habitat.—Indian Ocean, Madagascar (Rabbe), surface.
18. Aulosphæra multifurca, n. sp.
Radial tubes cylindrical, more or less curved, three to four times as long as the smooth, often curved, tangential tubes; studded with numerous forked, irregular, lateral branches, and armed at the distal end with a verticil of twelve to sixteen divergent, forked, terminal branches.
Dimensions.—Diameter of the sphere 1.2; tangential tubes 0.06 long, 0.003 broad.
Habitat.—Arctic Ocean, Greenland (Olrik), surface.
19. Aulosphæra coronata, n. sp.
Radial tubes spindle-shaped, tapering from the thicker middle part towards both ends, twice as long as the thorny tangential tubes, studded with numerous irregular, curved, lateral spines, and bearing at the distal end a corona of twenty to twenty-five divergent, curved, terminal branches. (Similar to Auloscena flammabunda, Pl. 110, fig. 4.)
Dimensions.—Diameter of the sphere 3.0; tangential tubes 0.2 long, 0.08 broad.
Habitat.—Tropical Atlantic, Station 347, surface.
