7. Cornutella clathrata, Ehrenberg.
Shell wide, conical with slightly convex outlines. Pores regular, circular, gradually increasing in size towards the mouth, disposed in twelve to fifteen longitudinal alternating rows. Horn short and stout, conical. (Compare Cornutella curvata.)
Dimensions.—Shell 0.15 to 0.2 long, 0.06 to 0.09 broad.
Habitat.—Cosmopolitan; Atlantic, Indian, Pacific; also fossil in tertiary rocks of Barbados, Nikobar and Sicily.
8. Cornutella stylophæna, Ehrenberg.
Shell slender, conical, with undulate outlines. Pores subregular, circular, gradually increasing in size, disposed in six to nine quincuncial alternating longitudinal rows. Horn very long, cylindro-conical, sometimes about as long as the shell.
Dimensions.—Shell 0.1 to 0.13 long, 0.04 to 0.06 broad.
Habitat.—North Pacific, Californian Sea, depth 2600 fathoms.
9. Cornutella granulata, Ehrenberg.
Shell slender, conical, nearly cylindrical, with straight outlines, rounded at the apex. Pores very small and numerous, punctiform, disposed into very numerous parallel transverse rows. Horn small, conical (may be perhaps the shell of a Tintinnoid Infusorium?).
Dimensions.—Shell 0.08 long, 0.02 broad.
Habitat.—North Pacific, Californian Sea, depth 2600 fathoms.
10. Cornutella annulata, Ehrenberg.
Shell slender, conical, nearly cylindrical, with straight outlines, rounded at the apex. Pores small and numerous, regular circular, of equal size, regularly disposed in ten to fifteen parallel transverse series. Horn bristle-shaped. (Compare Artostrobus annulatus, Cornutella annulata, Bailey.)
Dimensions.—Shell 0.1 to 0.13 long, 0.03 to 0.04 broad.
Habitat.—Cosmopolitan, Atlantic, Pacific, surface.
