PROCEEDINGS 



1 



a 



^tdmi of l^dlKt^l ^tmm 



PHILADELPHIA. 



PART II, APRIL-SEPTEMBER, 1890. 



PUBLICATION COMMITTEE. 



Joseph Leidy, M. D., Geo. H. Horn, ;v1. D. 



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



J. H. Redfield. 



EDITOR : Edwakd J. Nolan, M. D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



LOGAN SQUARE. 

 1890. 



