658 THE AMERICAN NATURALIST [Vol. XLVI 



by solid dots. A profound influence of the starvation 

 conditions is evident from these graphs. Kelatively, the 

 lower grades are much in excess, the higher grades much 

 in defect in the starvation series. 



The same fact is quite patent when one deals with the 

 means of the series instead of comparing individual 

 classes in the same lot. Clearly from Diagram 9: 



