SECOND SEEIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL 1ND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



FOUNDED BY 



GEORGE , TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc. D., 



CONSERVATOR OF THE CONCHOLOGICAL SECTION OF THE ACADEMY OF 

 NATURAL SCIENCES OF PHILADELPHIA. 



VOL. XVI. 

 UROCOPTID^E, ACHATINID.E. 



PHILADELPHIA : 

 Published by the Conehological Section, 



ACADEMY OF NATURAL SCIENCES OF 1'HILADELPHIA. 

 1904. 



OF THE 



IJNiv/r -TV 



