PROCEEDINGS 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



1893. 



COMMITTEE ON PUBLICATION. 



John H. Redfield, Edward J. Nolan, M. D. , 



Thomas Meehan, Charles E. Smith, 



George H. Horn, M. D. 



Editor : EDWARD J. NOLAN, M. D. 



PHILADELPHIA : 

 ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 

 1894. 



39 



