262 



Heredity and Environment 



SCOTCH CRl 



FIG. 91. RACES OF FOWLS. (From Romanes.) 



believable differences in structure and disposition; or by the 

 great variety of domestic fowls, all of which have probably de- 

 scended from the wild jungle- fowl; or by modern races of horses, 

 cattle, sheep, or swine. These are only a few of the many illus- 



