Flo. Si. Gray Percheron mare and tolt. Such colts, Ijlack at birth, become gray later in life. Notice, 

 however, that the colt's face is already white. This is due to white spotting, as in the hunter and 

 Clydesdale, not to the gray factor. The two forms of white are genetically quite distinct. 



Fig. 85. White marc and C(^lt. (Photograph by courtesy of W. P. Newell, Washburn, 

 111.) An extreme c-ondition of white spotting is here shown, in which the entire coat is 

 white from birth on. 



