

VI 



A desire to facilitate the study of this interest- 

 ing branch of American Conchology, was my in- 

 ducement to undertake this translation. It is a 

 fascinating subject, and has afforded me many 

 hours of pleasing and instructive recreation. Be 

 pleased to accept it, as a testimonial of my 

 respect for your zeal and liberality in the pro- 

 motion of the cause of natural science. 



C. A. POULSON. 



Philadelphia, October, 1831. 



