LEE BARKER WALTON 47 



the food supply approached the maximum, while the 

 other (group B) was collected from the rocky shores of 

 an island some ten miles distant where the food supply 

 apparently approached the minimum. Again the index 

 of variability showed no decided difference when the 

 probable error was considered. 



In connection with the ray flowers of the daisy it is of 

 interest to note that specimens from rich soil exhibited a 

 tendency toward an even number of ray flowers, while 

 those from the poor soil had a tendency toward an odd 

 number of ray flowers. This however may be a coinci- 

 dence, although taken into consideration with the differ- 

 ences, a somewhat remarkable one. No decided tendency 

 toward the Fibonacci series was apparent. 



The computations were made by the ordinary method, 

 checked by logarithms and a Burroughs adding machine. 

 There are a number of possible errors minimizing the 

 value of the results. These, together with the literature 

 bearing upon the subject will be considered in the final 

 paper. 



While the above results suggest that food supply does 

 not materially affect variability, it is evident that work 

 upon a larger number of specimens, as well as carefully 

 controlled experimental investigations, where the effects 

 of different groups of stimuli may be segregated, will be 

 necessary before any final conclusions may be drawn. 



