v/. 

 SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC 



WITH ILLUSTRATIONS OF THE SPECIES 



FOUNDED T5Y 



GEORGE W./TRYON, JR. 



HENRY A. PILSBRY, Sc.D., 



SPECIAL CURATOR DEPARTMENT OF MOLLUSCA, ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA. 



Part 



PHILADELPHIA : 



PUBLISHED BY THE CONCHOLOG1CAL DEPARTMENT 



ACADEMY OF NATURAL SCIENCES 



OF PHILADELPHIA. 



