Antirrhinum Ma jus Striatnin. 



125 



ceeded better than I had anticipated ; for at the end there 

 turned up a certain number of groups which corresponded 

 sufficiently closely to equal subdivisions of a scale to 

 warrant their selection as ordinates. I admit of course 

 that this method is not free from the personal factor; 

 but for the case under consideration it sufficed, since, 

 when the same group of flowers was sorted again, the 

 result agreed sufficiently well with the first trial. 



I plotted three curves in this way in 1897; each was 

 based on one typical flower of the terminal spikes of all 

 the plants flowering on a bed. The three beds contained 

 the offspring of three individual striped plants of the 

 1894 harvest, seeds of which had been saved and sown 

 separately; but whose flowers had been left to be polli- 

 nated by insects in the midst of a larger culture. More- 

 over the seed-parents were selected without reference 

 to the degree of their striping, and so the curves give an 

 idea of the average composition of the commercial race. 



I thus obtained the following table : 



These figures are exhibited in the form of a curve in 

 Fig. 22 ; in the case of the figures under C the scale or 

 unit of the ordinates is half of that selected for A and B. 



