01- 

 H-0 3 



MANUAL 



OF 



Structural and Systematic, 



WITH ILLUSTRATIONS OF THE SPECIES. 



By GEORGE W, TRYON, Jr. 



Conservator ok the Conchologk'al SKcriov qv \\\v. Acauemv of Natceal 

 Sciences of Philauelthia. 



VOX.. II. 



MURICIN^, PURPURIN.5:. 



PHILADELPHIA: 

 P u b 1 i s li e d b a' t li e A ii t li o r 



Academy of Natural Sciences. Cor. IOth & Race Sts. 



iss:i. 



