59.11.856:39.7 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 68. 



THE BEHAVIOR OF HOLOTHURIANS IN BALANCED 



ILLUMINATION. 



BY W. J. CROZIER. 



FROM THE AMERICAN JOURNAL OF PHYSIOLOGY, VOL. XLIII, No. 4. 



CAMBRIDGE, MASS., U.S.A. 

 JULY, 1917. 





