PROCEEDINGS 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



1897. 



COMMITTEE ON PUBLICATION: 



Thomas Meehan, Charles E. Smith, 



Edward J. Nolan, M. D., George H. Horn, M. D., 



Henry Skinner, M. D. 



Editor: EDWARD J. NOLAN, M. D. 



PHILADELPHIA : 

 ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 

 1898. 



