3Fn J^emoriam 
WILLIAM KEITH BROOKS 
1848-1908 
THE JOURNAL 
OF 
EXPERIMENTAL ZOOLOGY 
EDITORIAL BOARD 
William E. Castle . Frank R. Lillie 
Harvard University University of Chicago 
Edwin G. Conklin Jacques Loeb 
Princeton University The Rockefeller Inatltute 
Charles B. Davenport ThOxMas H. Morgan 
Carnegie Institution Columbia University 
Horace Jayne George H. Parker 
The Wistar Institute Harvard University 
Herbert S. Jennings Charles O. Whitman 
Johns Hopkins University University of Chicago 
F^^^^T•^■l> B. WiLSON, Columbia Univezslty 
and 
Ross G. Harrison, Yale University 
Managing Editor 
VOL. 9 No. 1 
SEPTEMBER, 1910 
PUBLISHED EIGHT TIMES A YEAR BY 
THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 
36th STREET AND WOODLAND AVENUE 
PHILADELPHIA, PA. 
Entered as second-class matter May 28, 1909, at the Post Office at Philadelphia. Pa., under Act of March 3. 1879 
