PROCEEDINGS 



OF THE 



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OF 



PHILADELPHIA. 



PART III. October, JSoveniber, December, 1873. 



PUBLICATION COMMITTEE. 



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



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



W. S. W. RUSCHENBEBGER, M.D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



Corner of Broad and Sansom Streets. 



1874. 



