PREFACE. 



On presenting the second edition of my Catalogue to 

 correspondent, I respectfully remark, that it is intended 

 more as a medium of facilitating exchanges than as a 

 complete catalogue of American shellsl There are, no 

 doubt, many mistakes which cannot be obviated except 

 through the kindness of my correspondents, who, I trust, 

 will inform me of errors and omissions. 



It will give me great pleasure to exchange specimens 

 of American or foreign shells. All species marked thus 

 (*) I have already in my collection, of course such as are 

 not thus designated will be particularly acceptable, though 

 I shall be pleased to receive in exchange live and perfect 

 shells, native or foreign, and will supply, as far as in my 

 power, what may be desired in return. 



CHARLES M. WHEATLEY, 



323 Grand street, JVhc York. 

 MARCH, 1845. 



