MANUAL 



OF 



ONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



BY GEORGE W, TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY. 



Vol. X. 



NERITID^l, ADEORBIID/E, CYCLOSTREMATID^, LIOTIIDyE, 



BY GEO. W. TRYON Jr. 



PHASIANELLIN^E, TURBINID^, DELPfllNULIN^E. 

 BY HENRY A. PII.SBRY. 



PHILADELPHIA: 

 Published by the Conehologieal Section, 



ACADEMY OF NATURAL SCIENCES, COK. 1QTH AND RACE STS. 



1888. 



LIBRARY 



OF CAUFORNIA 



MVZS 



