412 



Ralph S. Lillie 



mental process are similar in normal and in artificial fertilization. 

 Further and more precise analysis of these conditions is needed; 

 in particular, examination should be made of the susceptibility 

 of eggs, at different periods during and after maturation, to the 



TABLE VI 



Series I. August 24, iqoj 



Series II. September 2, igoj 



fertilizing influence of momentary warming in dilute potassium 

 cyanide solutions. This method, as will shortly be shown, pro- 

 duces results far superior to those obtained by simple warming in 

 normal sea-water; and it is possible that after the completion of 



