59.11:39.8 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 74. 



THE COMPARATIVE PHYSIOLOGY OF SYNAPTULA 

 IIYDRIFORMIS (LESUEUR). 



BY J. M. D. OLMSTED. 



FROM THE JOURNAL OF EXPERIMENTAL ZOOLOGY, VOL. XXIV, No. 2. 



CAMBRIDGE, MASS., U.S.A. 

 NOVEMBER, 1917. 



