SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES 



FOUNDED BY 



GEORGE W. TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc.D 



D EPARTMENT OF USCAi ^ 



SCIENCES OF PHILADELPHIA. 



Part 



PHILADELPHIA 



'UBLISPIED BY THE CONCHOLOGICAL DEPARTMENT 

 ACADEMY OP NATURAL SCIENCES 

 OF PHILADELPHIA 



