59.11:39.8 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 74. 



THE COMPARATIVE PHYSIOLOGY OF SYNAPTULA 

 I IYDRIFORMIS (LESUEUR) . 



BY .1. M. D. OLMSTED. 



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



CAMBRIDGE, MASS., U.S.A. 

 NOVEMBER, 1917. 



