PROCEEDINGS 



OP THE 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA 



1879 



PUBLICATION COMMITTEE. 

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



Wm. S. Vaux, Thomas Meehan, 



J. H. Redfield. 



Editor : EDWARD J. NOLAN, M.D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



S. W. Corner Nineteenth and Race Streets. 



1880. 



