BIOLOGICAL BULLETIN 



OF THE 



fiDarine Biological Xal>oratorv> 



WOODS HOLL, MASS. 



JEOitorial Staff. 



E. G. CONKLIN The University of Pennsylvania. 

 JACQUES LOEB The University of California.. 

 T. H. MORGAN Bryn Mawr College. 

 W. M. WHEELER The University of Texas. 

 C. O. WHITMAN The University of Chicago. 

 E. B. WILSON Columbia University. 



Managing lEMtor. 



FRANK R. LILLIE The University of Chicago 



VOLUME IV. 



WOODS HOLL, MASS. 

 DECEMBER, 1902, TO MAY, 1903. 



