BIOLOGICAL BULLETIN 



OF THE 



fIDarinc Biological Xaborator^ 



WOODS HOLL, MASS. 



JEMtorial Staff. 



E. G. CONK.LIN The University of Pennsylvania. 

 JACQUES LOEI: The University of California. 

 T. H. MORGAN Columbia University. 



W. M. WHEELER American Museum of Natural 

 History, Neiv York. 



C. O. WHITMAN The University of Chicago. 

 E. B. WILSON Columbia University. 



Editor, 



FRANK R. LILLIE The University of Chicago. 



VOLUME VII 



WOODS HOLL, MASS. 

 JUNE, 1904, TO NOVEMBER, 1904. 



