JOURNAL OF GENETICS, VOL XI. NO. 2 



75 



1 — I — 1 — \ — \ — \ — I — r 



T — I — I — r 



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74 



73 



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72 



71 



19 . _ 20 



19 19 20 / 16 



/ 20 20 



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70 



21 / 19 



69 



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68 



67 



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1 23 ^'~' 



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66 



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65 



64 



63 



62 



61 



60 

 11 



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2 3 4 5 



Fig. 2. Rows 15, 16, 19, 20, 21, 22, 23 in 1917. 



Dotted lines give limits of distributions of controls E and .V. 

 The .r-axis gives length : the (/-axis index = 100 length/breadth. 



