



mr 



PROCEEDINGS 



.^tdtlemg of ^Htittctl ^t\mt% 



i 



PHILADELPHIA. 



PART 1.—JANVABY—MAY, 1881. 



PUBLICATION COMMITTEE. 



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



Wm. S. Vaxjx, Thomas Meehan, 



J. H. Redfield. 



EDITOR: Edward J. Xolan. M. D. 



PHILADELPHIA: 

 ACADEMY OF NATURAL SCIENCES, 



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



1881. 



