THE JOURNAL 



OF 



EXPERIMENTAL ZOOLOGY 



E D I T 1<: D [} Y 



William E. Castle 



Harvard University 



Edwin G. Conklin 



Princeton University 



Charles B. Davenport 



Carnegie Institution 



Herbert S. Jennings 



Johns Hopkins University 



Frank R. Lillie 



University of Chicago 



Jacques Loeb 



The Rockefeller Institute 



Edmund B. Wilson 



Columbia University 



Thomas H. Morgan 



Columbia University 



George H. Parker 



Harvard Univeisity 



Raymond Pearl 



Maine Agricultural 

 Experiment Station 



and 



Ross G. Harrison, Yale University 

 Managing Editor 



VOLUME 27 

 1918-1919 



THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 

 PHILADELPHIA, PA. 



