77: 

 7? 



SECOND SEEIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL SND SYSTEMATIC. 



WITH ILLUSTKATIONS OF THE SPECIES. 



FOUNDED BY 



GEORGE . TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc. D., 



CONSERVATOR OF THE CONCHOLOGICAL SECTION OF THE ACADEMY OF 

 NATURAX SCIENCES OF PHILADELPHIA. 



VOL. XVI. 

 UROCOPTID.E, ACHATINID.E. 



PHILADELPHIA : 

 Published by the Conchological Section, 



ACADEMY OF NATURAL SCIENCES OF I'HILADELPHIA. 

 1904. 



