BIOLOGICAL BULLETIN 



OK THF. 



flDarinc Biological Xaborator^ 



WOODS HOLL, MASS. 



EMtorial Staff 



E. G. CoNKLiN — TJie 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. 



/IDanaoing Editor 



Frank. R. Lillie — 2 he University of Chicago. 



Volume XV. 



WOODS HOLL, MASS. 

 JUNE 1908 TO NOVEMBER 1908. 



