366 W. J. CROZIER 



LITERATURE CITED 



Goss, P. H. I860 A year at the shore. London, xii + 330 p., 3G pi. 

 Olmsted, J. M. D. 1917 Notes on the locomotion of certain Bermudian mol- 



lusks. Jour. Exp. Zool., vol. 24, p. 223-236. 

 Parker, G. H. 1911 The mechanism of locomotion in gastropods. Jour. 



Morph., vol. 22, p. 155-170. 



1914 The locomotion of Chiton. Contrib. Bermuda Biol. Sta. vol.2, 



no. 31, 2 pp. 



1917 The pedal locomotion of the sea-hare Aplysia californica. Jour. 



Exp. Zool., vol. 24, p. 139-145. 

 Vles, F. 1907 Sur les ondes pedieuses des IMoUusques reptateurs. Compt. 



rend.' Acad. Sci., Paris, T. 145. p. 276-278 



