THEORY OF EVOLUTIOX 



175 



25. Here one of the grand-parental types 

 reappears in large numbers, while the extreme 

 of the other grand-parental tyjDe did not re- 

 appear (in the counts obtained), although the 

 F2 number would probably overlap the lower 



K 



r. 



1 



I 

 i_L 



J_J_L 



I I 

 I I 

 I I I 

 J I I 1 i_ 



Bttfk- rross 



I I 

 _1_L 



I I 



t* » n 



Fig. 87. Cross of normal and fantail pigeons. (See Fig. 

 86.) The F, range is wider than that of F,. The normal grand- 

 parental type of 12 feathers was recovered in F^, but tlie higher 

 numbers characteristic of fantails were not recovered. 



