F. aculeiformis.
F. scalarinus.
F. colus. The spindle Fusus. Pl. [25], fig. 3.
Species turreted or sub-turreted, not umbilicated; outer lip entire, columella smooth.
F. filosus. The threaded Fusus.
Species sub-turreted and umbilicated.
7. Pyrula. Twenty-eight species.
Distinguished from the Fusus by having a short depressed spire, and the last whorl very large and ventricose, giving this shell the shape of a pear.
Shell pyriform by the depression of the spire, the canal conical, very long or middling, sometimes a little sloped; aperture oval, very large; columella smooth.
Pyrula canaliculata.