SECOND SERIES: PULMONATA. 



MANUAL 



CONCHOLOGY: 



STRUCTURAL AND SYSTEMATIC. 



WITH [ILLUSTRATIONS OF THE SPECIES. 



MU'N DKD r.Y 



GEORGE W TRYON, JR. 



CONTINUED 11 Y 



HENRY A. PILSBRY, Sc.D., 



TOi; OF THE CoNCHOLOGICA L SECTION OF THE ACADEMY OF 

 NATURAL SCIENCES OF PFILADKLPHIA. 



Part 



PHILADELPHIA: 



Published by the Conchological Section 



ACADEMY OF NATURAL SCIENCES 

 OF PHILADELPHIA. 



