152 SPECIFIC 



Fig. 2. C. Caput serpentis. 



Shell triangularly gibbous, rather obtuse at the 

 base. 



Lister Conch, tab. 702. fig. 50. 



Specimen brown, spotted with white on the up- 

 per part, a pale fi.ilvous spot at each extremity, 

 beneath white. 



Inhabits the Mauritius. 



Fig. 3. C. lurida. 



Shell rather turbinate, lurid, slightly banded, 

 extremities yellow with t\vo black spots. 



Lister Conch, tab. 671. fig. 17. 



Specimen beneath white; above obscurely mark- 

 ed with two pale cinereous bands. 



Inhabits the Mediterranean and Atlantic. 



This species stands in the first section of the ge- 

 nus in Gmelin's edition; but is here selected as an 

 example of the third, being much more remark- 

 ably umbilicate than many which are so denomi- 

 nated. 



Fig. 4. C. Moneta, 



Shell margined, knotty, white. 



