BIOLOGICAL BULLETIN 



OF THK 



nDarine Biological OLaborator^ 



WOODS HOLE, MASS. 



EMtorial Staff 



E. G. CONK.LIN -Princeton University- 

 JACQUES LOEB The University of California. 

 T. H. MORGAN Columbia University. 

 W. M. WHEELER Bussey Institution, 



Harvard University. 



C. O. WHITMAN Tlie University of Chicago. 

 E. B. WILSON Columbia University. 



lEMtor 



FRANK R. LILLIE The University of Chicago 



VOLUME XVI. 



WOODS HOLE, MASS. 

 DECEMBER 1908 TO MAY 1909. 



