THE AMERICAN JOURNAL 



OF 



ANATOMY 



EDITORIAL BOARD 



Charles R. Bakdeen 



University of Wisconsin 



Henry H. Donaldson 



The Wlstar Institute 



Simon H. Gage 



Cornell University 



G. Carl Huber 



University of Michigan 



George S. Huntington 



Columbia University 



Henry McE. Knower, 



Secretary 

 University of Cincinnati 



Franklin P. Mall 



Johns Hopkins University 



J. Playpair McMurrich 



University of Toronto 



George A. Piersol 



University of Pennsylvania 



VOLUME 20 

 1916 



THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 

 PHILADELPHIA, PA. 



