MANUAL 



OF 



T C\ n ^7 



LOG Y 



STRUCTURAL AND SYSTEMATIC. 



WITH ILLUSTRATIONS OF THE SPECIES. 



B Y GEORGE W,TR YON) JR. 



' NM-.UV \TOR OF THE CONCHOLOOICAL SKCTIOX OF THK Ar AT>TCMY (F NATURAL 

 SCIENCES OF PHILADELPHIA, 



YOU III. 



TRITONIDjE, FUSION BUCGINIDJE. 



PHILADELPHIA: 

 Published by the Author, 



ACADEMY OF NATURAL SCIENCES. COR. IDTH & RACE ETC. 



1881. 



LIB It A K i 



U N J Y K K S I T V Of 



nA T TIT/ u>\ i \ 



