SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES. 



FOUNDED BY 



GEORGE W. TRYOIM, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc.D., 



SPECIAL CURATOR DEPARTMENT OF MOLLUSC A, ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA. 



Part 







PHILADELPHIA. : 



PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 



ACADEMY OF NATURAL SCIENCES 



OF PHILADELPHIA. 



