PROCEEDINGS 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



1892. 



COMMITTEE OF PUBLICATION. 



John H. Redfield, Edw. J". Nolan, M. D., 



Thomas Meehan, Angelo Heilprin, 



Charles E. Smith. 



Editor : EDWARD J. NOLAN, M. D. 



PHILADELPHIA: 

 ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 



1893. 



