STUDIES IN ARTIFICIAL PARTHENOGENESIS. 249 



tion is probably due to the formation of chlorine. Since chlorine 

 has a very low surface tension, the fact that mercuric chloride 

 causes membrane elevation can not be used as an argument 

 against the surface tension theory. 



REFERENCES. 



1. Traube. 



'09 Biochem. Zeitsch., XVI., 182. 



2. Heilbrunn. 



'13 BIOL. BULL., XXIV., 343; 1915, ib., NNIX., 149; 1924, ib., XLVI., 277. 



3. Lillie. 



'21 BIOL. BULL., XLI., 125. 



4. Lillie. 



'19 Problems of Fertilization. Chicago, 1919. 



5. Mellor. 



A Comparative Treatise on Inorganic and Theoretical Chemistry, Vol. IV., 

 London, 1923. 



6. Gmelin-Kraut. 



'14 Handbuch der anorganischen Chemie. Bd. V., Abt. 2. 7te Aufl. 

 Heidelberg, 1914. 



