MANUAL 



OF 



ONCHOLOGY; 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



BY GEORGE W. TRYON, JR. 



CONTINUED BY 



HENRY A. PILSBRY. 



. XII. 



STOMATELLID.-E, SCISSURELLID.E, PLEUROTOMARIID^!, HALIO- 



TID/E, SCUTELLINID^E, ADDISONIID/E, COCCULINID^], 



FISSURELI.ID.E. 



PHILADELPHIA: 

 Published by the Conehologieal Section, 



ACADEMY OF NATURAL SCIENCES, COR. IQTH AND RACE STS. 



1890. 



' It o^^ 



UNIVERSITY 



