PROCEEDINGS 



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PHILADELPHIA. 



PAET II. APRIL-AUGUST, 1887. 



PUBLICATION COMMITTEE. 



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



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



J. H. Redfield. 



EDITOR: Edward J. Nolan, M. D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 

 1887. 



