No. 551] 



INFLUENCE OF STARVATION 



671 



correlation between two dimensions, or the ratio of the 

 one to the other. 



The only case of this kind to be considered here is the . 

 coefficient of fecundity, which is simply the ratio of the 

 total seeds matured by a population of pods to the total 

 ovules formed. The values are given in Table XXVI. 



For the ancestral series all but 2 of the 20 compari- 

 sons within strains show lower fecundity in the starved 

 series. Taking averages : 



Navy, Within Strains, ^ = — .0790 

 Ne Plus Ultra, .4= — .1178 



White Flageolet, A = +.0075 



Thus Navy and Ne Plus Ultra mature about 7-11 per 

 cent, more of their ovules on feeding than on starvation 

 fields. Apparently, White Flageolet is not affected. 



TABLE XXVI 



14,029 

 5^581 



NHHC 

 NHHHC 

 NHDC 

 NHDDC 



For the comparison series grown from these seeds, we 

 find that of the 20 comparisons, direct and cross, within 

 the strains, 12 show lower and 8 show higher fecundity 

 in the offspring of starved plants. The means are: 



