PREFACE. 



In the preparation of the following Catalogue, the Author 

 has consulted personally most of the works referred to. They 

 are contained in the Library of the Academy of Natural Sci- 

 ences — which embraces the largest collection of works on Con- 

 chology in the United States. 



Acknowledgments are due to 



William G. Binney, Burlington, N. J., 

 Thomas Bland, New- York, 

 Temple Prime, New-York, 

 William M. Gabb, Philadelphia, 

 and others, for valuable information and advice. 



In order to guard as far as possible against errors and omis- 

 sions, most of the lists herein contained have been corrected 

 by their respective Authors. 



The proof sheets have also been revised by the works re- 

 ferred to. 



It is hoped that this little volume will prove a convenient 

 and useful aid to Conchologists at home and abroad, by directing 

 their attention to the labors of men, man)'' of whom published 

 but little, and are now almost forgotten, but whose papers are 

 nevertheless valuable ; and by furnishing, as nearly as possible, 

 accurate dates of publication. Should these objects be realized, 

 the Author will have reaped an abundant reward for the care 

 and labor bestowed. 



GEO. W, TRYON, Jr,, 



025 Market Strket. 

 ruiLADELi'iiiA, April 1st, 18G1. 



