A 



MONOGRAPH 



OP THE 



TERRESTRIAL MOLLUSCA 



INHABITING THE 



LTNITED STATES. 



fW^ith Illustrations of all the Species. 



BY GEORGE W. TRYON, JR., 



Editor of The American Jourgal of Conciiology ; Member of tiie Academy of Natural Sci.T,c-s 



of Philadelphia; Corresponding Member of the Boston Society of Natural History, 



the Lyceum of Natural History of New York, the California Academy 



of Natural Sciences, the Zoologischen-botanischen .. 



Gesellsohaft in Wien, etc. 



PHILA.DELPHIA : 



Published by the Authob, 625 Market , Street. 



NEW YORK: LONDON: ' 



BATLLVT^KE BEOTHERS No. 520 Broadway. Teubner &' Co., No. 60 Paternoster Row. 



FARIS MADRID : 



J B BAli,LlERE ET FILS, Rue Hautefeuille. C. Baillt-Bailliere, Calle del Principe. 



BERLIN : 

 AsHER & Co., No. 20 ITnter d. Lindea. 



