308 W. J. CROZIER AND LESLIE B. AREY 



the anterior direction. The foot is positively stereotropic, and 

 when removed from a surface folds together laterally. These 

 latter peculiarities enable the animal to creep upon narrow blades 

 of eel grass where it feeds. The stereotropism of the anterior 

 end of the foot is responsible for righting behavior; there is 

 no apparent statolythic control of dorsoventral body orientation. 



Dyer Island, Bermuda, 

 June, 1918. 



LITERATURE CITED 



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 I Arey, L. B., and Crozier, W. J. 1919 The sensory responses of Chiton. Jour. 



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