T3 

 I 



PREFACE 



EARTH 



SCIENCES 



LIBRARY 



THE last edition of the Catalogue of this Collection was published in 1839. In 1843 the Author 

 removed from the city of New York to his present residence at Rye, Westchester Co., N. Y., where 

 he has re-arranged the Collection in the same order with this Catalogue. While thus occupied, the 

 opportunity was embraced of compiling this edition by the re-examination of the specimens and their 

 descriptions, without any regard to the last edition. 



It' will be observed that the Collection has increased more than threefold, which has rendered 

 it necessary to re-number the Catalogue. 



This has been achieved, in part, by the liberal contributions of numerous correspondents, and in 

 part by purchase, and chiefly from the collection of Hugh Cuming, Esq., of London. The same 

 systematic arrangement has been followed, modified, however, by the recent discoveries of many of 

 th; Mollusca, hitherto unknown. 



Most of the modern Genera are introduced in their proper places, and will be found by a 

 reference to the Index. 



The Species are arranged for convenience in alphabetical - order, to which are added their 

 Varieties, Authors, and Synonymes, as far as it was practicable. 



References to figures and descriptions of each species, and of most of the varieties, are given, the 

 Author having especially consulted-the recent works on Conchology. 



The fourth column contains the numbers of the species, or page of the second edition of 

 Lamarck's Animaux sans Vertebres, par Monsieur Deshayes, excepting in the Families of the 

 Colimacea and Cyclostomacea, where they show the grouping of the species after the arrangement 

 of Monsieur Louis Pfeiffer. In the Index will be found the names of all the Genera and Families, and 

 also the Synonymes of the Species. 



A list of the works on Natural History in the Cabinet is also added, that Correspondents and 

 others may see whether it contains their memoirs, and if not, they will confer a favor by forwarding 

 them in exchange for the Catalogue, or anything else they may designate. 



All the Species not enumerated in the Catalogue will be thankfully received (in exchange), 

 provided they are accompanied by a list of " Desiderata." 



JOHN C. JAY. 



Rye, Weitcheiter Co., N. Y., U'. S. America. 

 December, 1850. 



M60G021 



