PROCEEDINGS 



ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA. 



18 8 5. 



COMMITTEE OF PUBLICATION: 



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



Edw. J. Nolan, M. D., Thomas Meehan, 



John H. Redfield. 



Editor : EDWARD J. NOLAN, M. D. 



PHILADELPHIA: 



ACADEMY OF NATURAL, SCIENCES, 



LOGAN SQUARE, 



18 86. 



