EAR-SIZE 



15 



The growth-curves for litter 2, which were produced by this mating, 

 are shown in figure i. In mating 3, the deviations are all plus in 

 character, but are small in amount, namely, 2.5, 4.5, 2.5, and 2.5 mm. 



Ear length 



- m mm. 



180 



no 



160 



ISO 



140 



130 



120- 



110 



100- 



90- 



80- 



70- 



60- 



50- 



40- 



30- 



Age in 

 weeks. 



786 



n 



yrams, 



2200 



2/00 



2000 



1900 



1800 



{700 



1600 



ISOO 



1400 



1300 



1200 



1100 



1000 



900 



600 



700 



600 



500 



400 



300 



200 



100 



I 2 3 4 5 6 7 8 9 10 II 12 13 14 IS 16 17 18 19 20 21 



FIG. 3. Growth-curves for a litter of five second-generation (F 2 ) half-lop rabbits. 

 See table 9 and compare figs. I and 2. 



From mating 4, by the same female that was concerned in mating 3, a 

 single young one was reared, which showed a plus deviation of 4.5 mm. 



