6o SENESCENCE AND REJUVENESCENCE 



Lyon, E. P. 



1902. "Effects of Potassium Cyanide and of Lack of Oxygen upon the 

 Fertilized Eggs and the Embryos of the Sea Urchin (Arbacia 

 punctulata) ," Am. Jour, of Physiol., VII. 



1904. "Rhythms of Susceptibility and of Carbon Dioxide Production 

 in Cleavage," Am. Jour, of Physiol., XL 



Mathews, A. P. 



1906. "A Note on the Susceptibility of Segmenting Arbaciaa,nd Asterias 

 Eggs to Cyanides," Biol. Bull., XL 



Pfeffer, W. 



1901. Pflanzenphysiologie, Band II. Leipzig. 



SCHULTZ, E. 



1904. "Uber Reduktionen: I, tJber Hungererscheinungen bei Planaria 

 lactea," Arch. f. Entwickelungsrnech., XVIII. 



Spaulding, E. G. 



1904. "The Rhythm of Immunity and Susceptibility of Fertilized Sea 

 Urchin Eggs to Ether, to HCl and to Some Salts," Biol. Bull, VI. 



