MANUAL 



OF 



Structural and Systematic. 



WITH ILLUSTRATIONS OF THE SPECIES. 



By GEORGE W, TRYON, Jr. 



CONTINUED EY 



HENRY A. PILSBRY. 



Vol. XII. 



STOMATELLID.E, SCISSURELLID.E, PLEUROTOMARIID/E, HALIO 



TID.E, SCUTELLINID/E, ADDISONIID.E, COCCULINID.E, 



FISSURELIJD.E. 



PHILADELPHIA: 

 Published by the Conehologieal Section, 



ACADEMY OF NATURAL SCIENCES, COR. 19TH AND RACE STS. 



1890. 



