SECOND SEEIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMITIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



FOUNDED BY 



GEORGE . TRYON, JR. 



CONTINUED BY 



HENKT A. PILSBRT, Sc. D., 



CONSERVATOR OF THE CONCHOLOGICAL SECTION OF THE ACADEMY OF 

 NATURAL SCIENCES OF PHILADELPHIA. 



UROCOPTID^E. 



PHILADELPHIA : 

 Published by the Conehologieal Section, 



ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. 



1903. 



LIBRARY 



UNIVERSITY OF CALIFORNIA 

 DAVIS 



