SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL IND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIKS 



FOUNDED BY 



GEORGE W, TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc. D., 



SPECIAL CURATOR OF THE DEPARTMENT OF MOLLUSCA, ACADEMY OF 

 NATURAL SCIENCES OF PHILADELPHIA. 





VOL . 



AFRICAN ACHATINID^ :'' 



PHILADELPHIA: 

 Published by the Conehologieal Department, 



ACADEMY OF NATURAL SCIENCES OF V HILADELPHIA. 



1904-1905. 



