292 HEREDITY AND ENVIRONMENT 



between that of the parents. He found the 

 same thing true of length and breadth of the 

 skull (Fig. 63) and of the size of other portions 

 of the skeleton, and he concluded that such 

 quantitative characters are not inherited in 

 Mendelian fashion. 



Quite recently MacDowell, working on the 

 inheritance of size in rabbits, concludes that 

 this character, as well as other quantitative dif- 

 ferences between parents which appear to 

 blend in the offspring, such as Castle's case of 







wm^ ^" 









n 





v^O^ 



B^ 1 



WW- 



~M 



^m B 



JH 



WB \ t 







^3t 



HVB 









mm J 



.* 



[ — ^Ji 









Hk^^M 



Fig. 63. Blending inheritance of size in rabbits; the skulls 

 of two parents are shown in 1 and 3, of their intermediate 

 offspring in 2. (From Castle.) 



