Shell similar to C. alba Brown in size and form with the exceptions follow¬ing. It is bluish white and never has the brown outer coat of C. alba, though the extremely thin epidermis sometimes shows a light brown line marginating the apex. It is covered all over with fine spiral striae. The columella is thickened and twisted more than occurs in C. alba, and in C. Verrillii has the effect of an incipient plait. Lastly the aperture extends farther behind the spire than in C. alba, and, instead of the margin being curved over to a slight callus sealing the apex, there is a well marked perforation, most marked in the adult shells. Largest specimen 7.5 long by 3.0 mm. wide.

Shell small, slender, translucent white, the aperture as long as the shell, smooth except for faint incremental lines; apex with a shallow funicular pit, the whorls involved; shape nearly cylindrical; outer lip thin, straight, the posterior commissure receding about half a whorl; aperture very narrow except at the anterior end, where it rounds evenly into a very short slightly thickened unfolded pillar; body with hardly a wash of enamel or none; base imperforate. Height 6.5; diameter, 3 mm. U. S. Nat. Mus. Cat. No. 10792G.
Off Georgia and Fernandina, numerous specimens. Also off the coast of North Carolina in 50 to 124 fathoms, temperatures 58° to 75° F.

This species is larger and more cylindrical than C. umbilicata of Europe. It is nearer G. cylindracea var lineata, but is shorter in proportion to its width, and its body is also shorter in proportion to the whole length and more obliquely attenuated to the columella. It has a striking similarity to C. alba, when decorticated, until closely examined.
The other species common to the region are C. auberi Orbigny, C. occulta Mighels, and perhaps C. cylindracea Pennant, specimens of which were received from Cuming as from the Antilles (?). C. krebsii Morch would seem to be suspiciously near C. alba, but I have seen no specimens, and the locality (Anguilla, etc.) seems very far south for that species. The suspicion arises that the specimens may have been derived from ballast thrown overboard by New England trading craft or New York fruit-carriers.

Off the coast of North Carolina. USA.