144 



K, MITSUKURI, HOW MANY TIMES DOES 



Of the above pair, the male unfortunately died in the autumn of 

 1894. 



In May of the present year (1895), the remaining female was again 

 placed in the same pond together with a small male and a small female. 

 It may be supposed by some that the placing of the second female in 

 the same pond might vitiate the experiment, but in reality, there w^as no 

 fear of that, as the smaller female which was only half the size of the 

 first female would deposit eggs which can be easily told from those laid 

 by the latter by their smaller size. For some reason the smaller in- 

 dividuals did not flourish in the pond : the male died towards the end of 

 July, and the smaller female which had not been observed to lay any 

 eggs was also shortly after removed from the pond in a sickly condition 

 and died in a few days. The first (large) female, however, made three 

 deposits of eggs. The facts in regard to them may be gathered from 

 the following table : — 



In regard to the third deposit, its date of deposition was un- 

 fortunately not noted, owing to the unavoidable absence of Mr. Hattori. 



