je&itorial Staff. 



E. G. Conklin — The University of Pennsylvania. 

 Jacques Loeb — The University of California. 

 T. H. Morgan — Columbia University. 

 W. M. Wheeler — American Museum of Natural 



History, New York. 

 C. O. Whitman — The University of Chicago. 

 E. B. Wilson — Columbia University. 



flDanaging Editor. 



Frank R. Lillie — The University of Chicago. 



All communications and manuscripts should be sent to the Managing 

 Editor, the University of Chicago, Sept. 15th to June 15th, or Woods 

 Holl, Mass., June 15th to Sept. 15th. Subscriptions and other matter 

 should be addressed to the Biological Bulletin, 41 North Queen Street, 

 Lancaster, Pa. 



