59.11.85:4.36 

 59.11.856:71 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 52. 



THE SENSORY POTENTIALITIES OF THE NUDIBRANCH 



RHINOPHORE.' 



BY LESLIE B. AREY. 



No. 53. 



STUDIES ON AMPHIOXUS. 



BY E. L. MARK AND W. J. CROZIER. 



I. THE PHOTORECEPTORS OF AMPHIOXUS. 



BY W. J. CROZIER. 



FROM THE ANATOMICAL RECORD, VOL. XI, No. 6. 



CAMBRIDGE, MASS., U.S.A. 

 JANUARY, 1917. 



