PROCEEDINGS 





OF THE 



catlfmjj of latiiral Sclnu^s 



OF 



PHILADELPHIA. 



PART III. October, November , and Decem- 

 ber, 1874. 



PUBLICATION COMMITTEE. 

 Joseph Leidy, M.D., Geo. W. Tryon. Jr., 



Wm. S. Vaux, Edw. J. Nolan, M.D., 



W. S. W. RUSCHBNBERGEK, M.D. 



^ 



"-^ 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



Corner of Broad and Sansom Streets. 



1875. 



4- 



