PROCEEDINGS 



OF THE 



Inulemj! of jptural muttm 



OF 



PHILADELPHIA. 



PART III. November and December, 1879. 



PUBLICATION COMMITTEE. 



Joseph Leidy, M.D., 

 Wm. S. Vadx, 



Geo. H. Horn.M.D., 



Thomas Meehan, 



J. H. Redfield. 



EDITOR: Edward J. Nolan, M.D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



S. W. Corner of 19th and Race Streets. 



1880. 



Si: 



