76 BOOK OF SPECIES. 



T. ciNGULiFERA. Elongate, turreted, taper- 

 ing, transversely striated, whitish, with the suture 

 brown and deeply impressed, j . . . j. Front. 8. 



LES CANALIFERES. 



CERITHIUM. 



Turreted ; aperture short, oblong, oblique, termi- 

 nated at the base by a short truncated or curved 

 canal; never notched, a slight channel at the 

 upper extremity of the right lip; operculum 

 small, horny, orbicular, 



C. PALUSTRE. Turreted, thick ; whorls with 

 longitudinal plaits, and three transverse striae, 

 olive-brown ; the base of the body-whorl deeply 

 furrowed; lip sub-crenulated ; canal very short. 

 4f. W. 25. 39. 



C. SULCATUM. Turreted, solid, with strongly 

 marked longitudinal plaits and transverse furrows, 

 brownish red ; lip large, semi-circular, and united 

 to the pillar, so as to render the very short canal 

 tubular. 2J. W. 28. 161. 



C. TELESCOPiuM. Couical, turreted, with 

 the whorls continuous and transversely grooved, 

 deep brown ; pillar twisted and protuberant ; base 

 nearly flat; canal extremely short. 3 or 4. W. 

 30. 120. 



C. vuLGATUM. Turreted; whorls flattish. 



