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«» AMERICAN 



JOURNAL OF C0NCH0L0GY. 



VOLUME VII. 



PUBLISHED BY THE 



Conchological Section of the Academy of Natural Sciences. 



PUBLICATION COMMITTEE: 



GEO. W. TRYON, Jr., Editor, 



S. R. ROBERTS, 



EDW. J. NOLAN, M. D. 



/2-y ' 23L 



PHILADELPHIA: 



Published by 



The Conchological Section of the Academy of Natural Sciences, 



N. W. cor. of Broad and Sansom Streets. 



NEW YORK: LONDON; 



B. Westerman, & Co., No. 471 Broadway. Trubner & Co., No. 60 Paternoster Row. 



BERLIN ! 

 Asher & Co., No. 60 Unter d. Linden. 



1872. 



