PROCEEDINGS 



ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA 



18 8 3. 



committeie of publication: 



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



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



John H. Redfield. 



Editor : EDWARD J. NOLAN, M. D. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 



S. W. Corner Nineteenth and Race Streets, 



1884. 



