SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



BY GEORGE W. TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc. D., 



CONSERVATOR OF THE CONCHOLOGICAL SECTION OF THE ACADEMY OP 

 NATURAL SCIENCES OF PHILADELPHIA. 



Vol. XII. 



AMERICAN BULIMULID^E: NORTH AMERICAN AND ANTILLEAN DRY- 

 M.EUS, LEJOSTRACUS, ORTHALTCIN^} AND AMPHIBULTMIN^E. 



PHILADELPHIA: 

 Published by the Conchologieal Section, 



ACADEMY OF NATURAL SCIENCES, COR. IQTH AND RACE STS. 



1899. 



LIBRARY 



UNIVERSITY OF CALIFORNIA 

 DAVIS 



