M A N U A 



OF 



ONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



BY GEORGE W. TRYON, JR. 



CONSERVATOR OF THE CONCHOLOGICAI, SECTION OF THE ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA. 



VOL. VII. 



TEREBRID^E, CANCELLARIID^E, STROMBID^E, CYPR^EID^E, 

 OVULID.E, CASSIDID^E, DOLIID^E. 



PHILADELPHIA: 

 Published by the Author, 



ACADEMY OF NATURAL SCIENCES, COR ISTH & RACE STS. 



1885. 



LIBRARY 



UNIVERSITY OF CALIFORNIA 

 DAVIS 



