CONCHOLOGY. 



Persuaded as we are that the present shell is a new and un- 

 described species, we have named it in compliment to M. B. Ferussac, 

 Member of the French Institute ; a Conchologist, whom we have 

 found to possess extensive learning and liberality in the science, and 

 who is besides possessor of a very valuable collection of exotic land 

 and fresh water shells, which are now in a course of periodical 

 publication. 



Vol. II. 



