59.11.57:51.23 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 62. 



ON THE PIGMENTATION OF A POLYCLAD. 



BY W. J. CROZIER. 



WITH ONE PLATE. 



FROM THE PROCEEDINGS OF THE AMERICAN ACADEMY OF ARTS AND SCIENCES, 



VOL. LII, No. 11. 



CAMBRIDGE, MASS., U.S.A. 

 MAY, 1917. 



