CHEMICAL AGENTS ON CHROMATOPHORES 191 



Yung, Emile 1882 Recherches experimentales sur Taction des poisons chez les 

 cephalopodes. Mitteilungen aus d. Zool., S tat. zu Neapel., Bd. 3, 

 pp. 97-120. 



ZoETHOUT, W. D. 1904 The effects of various salts on the toxicity of skeletal 

 muscles. Amer. Jour, of Phys., vol. 10, pp. 211-221. 



