456 'Journal of Comparative Neurology and Psychology. 



Yerkes, R. M., '02. A contribution to the physiology of the nervous system of the medusa, Gonionemus 

 murbachii. I. The sensory reactions of Gonionemus. Amer. Jour. Physiol., Vol. 6 



P- 434- 



'02. n. The physiology of the central nervous system. Amer. Journ. Pysiol', Vol. 7, 



No. 2, p. 181. 



'04. The reaction-time of Gonionemus murbachii to electric and photic stimuli. Biol. 

 Bull., Vol. 6, No. 2, p. 84. 

 Yerkes, R. M. and Aver, J. B., '03. A study of the reactions and reaction-time of the medusa, 

 Gonionema murbachii to photic stimuli. Amer. Journ. Physiol., Vol. 9, No. 5, p. 279. 



