V'^' 



PROCIEEDINGS 



OF THE 





I 



OF 



PHILADELPHIA. 



PABT I.JAXUARY to 3IABCJI, 1880, 



y- 



3>f 



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. 

 1886, 



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