59.11.7:4 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 73. 



NOTES ON THE LOCOMOTION OF CEETAIN BERMUDIAN 



MOLLUSKS. 



BY J. M. D. OLMSTED. 



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



CAMBRIDGE, MASS., U.S.A. 

 NOVEMBER, 1917. 



