

if 



■!''\ 



JOURNAL 



OF 



THE ACADEMY OF NATURAL SCIENCES 



4' 



OP 



PHILADELPHIA. 



VOL. YIIT. SECOND SERIES. 



■L 







PHILADELPHIA: 



EINTED FOE THE 



ACADEMY 



Collins' Printing House, 705 Jaynb Street. 



18t4-1881. 





