CASSIDARIA. CASSIS. 99 



LES PURPURIFERES. 



CASSIDARIA. 



Shell obovate, or ovate-oblong; aperture longi- 

 tudinal, narrow, terminating at base in a 

 curved sub-ascending canal; lip varicose or re- 

 flected ; pillar-lip covering the columella, often 

 rough, granular, tuberculous, or wrinkled, 



C. ECHiNOPHORA. Ovate-globosc^ ventricose, 

 pale fulvous, with four or five tuberculated belts, 

 striated above and below; whorls of the spire 

 angulated; the angle crenated by tubercles. 3f. 

 W. 22. 9. 



C. TYRRHENA. Ovate, with transverse fur- 

 rows, of which two of the upper are tuberculated 

 and broader than the others; reddish fulvous; 

 aperture white ; pillar rugose-tuberculated. 3|. 

 W. 22. 11. 



CASSIS. 



Inflated; aperture longitudinal, narrow, terminated 

 at its base by a short canal, which is curved 

 abruptly towards the back of the shell ; colu- 

 mella plaited or wrinkled transversely ; right 

 lip almost always toothed. 

 ^ * Spire with varices. 



C. CORNUTA. Ovate-ventricose, dirty white, 

 indistinctly reticulated, slightly grooved, and form- 



