

- <)XD 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., 



SPECIAL CURATOR DEPARTMENT OF MOLLUSCA, ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA. 



1G2 Colored. 



PHILADELPHIA : 



PUBLISHED BY THE CONCHOLOGICAL DEPARTMENT 

 ADEMY OF NATURAL SCIENCES 

 OF PHILADELPHIA. 



