No. 540] INHERITANCE OF COLOR IN CATTLE 741 



And further, in quoting Mr. John Thornton he says : 



The peculiarity most striking was the color; a clear white body, 

 head and neck, witli much hair; but the ears, nose, circle around the 

 eyes, and the hoofs were black, and there were a few black spots on 



the fetlock above the hoof. 13 Black calves are not at all uncommon 



When the variation of color occurs the calves are always pure black, 

 " with not a white hair on them " never particolored. . . 



Professor S. Cossar Ewart, of Edinburgh, writes 

 (April 11, 1911) : 



Some years ago I saw at Chillingham crosses between these white 

 Park cattle and white Shorthorns— all the crosses were white or light 



Recently under his direction wild Chartley bulls were 

 crossed with domestic heifers. The matings and off- 

 spring are indicated by chart No. 2, which was drawn 

 from data supplied by him. 



From this, as from other pedigrees, it appears that the 

 white of the Park cattle is dominant white, that, barring 

 dominant white, the darker pigments are epistatieally 

 dominant over the lighter ones, but that neither domi- 

 nancy and segregation nor the coexistence of several pig- 

 ments, nor midway blends — all of which may operate here 

 — entirely explains the facts; there must also be occa- 

 sional intra-zygotic reaction and mutations. 



18 Ibid., p. 241. 

 14 Ibid., p. 237. 



