

SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OP THE SPECIES. 



FOUNDED BY 



GEORGE W. TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc.D., 



CONSERVATOR OF THE CONCHOLOGICAL SECTION OF THE ACADEMY OF 

 NATURAL SCIENCES OF PHILADELPHIA. 



Part 



PHILADELPHIA : 



Published by the Conchological Section 



ACADEMY OF NATURAL SCIENCES 

 OF PHILADELPHIA. 



