PREFACE, 



ACCORDING to promise, I present my correspondents with the first Supplement to my Catalogue. It will be 

 useful to point out the errors in the Catalogue, and will show the additions that have been made to the Cabinet 

 and to the Library. The Genus Bulla in the Catalogue proving very incomplete, I have thought it would be 

 better to reprint it in the Supplement. The Genus Cyrtulus in the Catalogue must also be erased ; the species will 

 be found in their proper place under the Genus Pyrula. Several new genera have been added, which will be found 

 on reference to the additional Index in this Supplement. 



I return my thanks to my friends and correspondents for their patronage of the Catalogue, and trust that it has 

 proved of value to them : nor can I omit to thank Mons. G. P. Deshayes, M. Petit de la Saussaye of Paris, and Mr. 

 J. H. Eedfield of New York, for their handsome notices of it in print. 



JOHN C. JAY, M.D. 



RYE, WBSTOHESTKK Co., NEW YORK, ) 

 United States of America. ) 



