JOURNAL 



OF 



THE ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



VOL. Vir.— SECOND SERIES. 



PHIL A I) E L P H I A : 

 P U B L I .S H E D F <) It Til K A C A !• F, M V , 



BY J . B . I. I P P I N C (_) T T Si CO. 

 1869. 



