BIOLOGICAL BULLETIN 



OF THE 



Marine Biological Xaborator^ 



WOODS ROLL, MASS. 



Editorial 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 ^ork'. 



C. O. WHITMAN The University of Chicago. 

 E. B. WILSON Columbia University. 



/IDanacjing BMtor. 



FRANK R. LILLIE The University of Chicago. 



VOLUME VIII 



WOODS HOLL, MASS. 

 DECEMBER, 1904, TO MAY, 1905. 



