SECOND SERIES: PULMONATA. 



MANUAL 



OF 



CONCHOLOGY 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTEATIONS OF THE SPECIES. 



FOUNDED BY 



GEORGE . TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY, Sc.D., 



SPECIAL CURATOR OF THE DEPARTMENT OF MOLLUSCA, ACADEMY OF 

 NATURAL SCIENCES OF PHILADELPHIA. 



VOL. XIX. 



OLEACINID^E. FERUSSACID^. 



PHILADELPHIA: 

 Published by the Conchological Department, 



ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. 



1907-1908. 



