PROCEEDINGS 



^failemg of ^atiual 



ft(JUt$ 



PHILADELPHIA. 



PAB.T I. JAJVUABY-APBJL, 1887. 



C 



PUBLICATION COMMITTEE. 



Joseph Leidy, M. D., Geo. H. Horn, M. D., 



Edw. J. Nolan, M. D., Thomas Meehan, 



J. H. Redfield. 







\ 



EDITOR: Edward J. Nolan, M. D. 



^ 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 

 1887. 



