No. 571] 



PATTERN BEY EL OPMEN T 



407 



This peculiarity of the side patch in horses is somewhat 

 paralleled in cows by a tendency to secondary breaking 

 up, though in a different way, as detailed below. It is 

 significant in this connection that in horses and donkeys 

 there is usually a black stripe along the spine from 

 shoulder to tail which may indicate that "centrifugal pig- 

 mentation" is also present (see beyond). The dotted 

 lines in Fig. 32 indicate the approximate boundaries of 

 the several primary patches. The crown patch seems to 

 he wanting in horses ; 2 is the ear patch, 3 the neck patch. 

 4, 5 and 6 the shoulder, side, and rump patches, 

 respectively. 



Of domestic ruminants I have studied the pigmentation 

 in the cow and show in Figs. 33 to 42 a few of the many 



from photographs or from the animals themselves, and 

 are of cows in which, so far as I know, there has been no 

 attempt at breeding for pattern. Two types of spotting 



mented areas are sharply outlined and solid or at least 



