DOMESTICATED MAMMALS AND THEIR USES 235 
p. 140), and it is probable that in colour and markings the ancestral 
forms harmonized more or less with their surroundings. Darwin 
long ago suggested that the bars and stripes so often present on 
various parts of the bodies of domesticated horses may be a case 
of atavism, z.e. “reversion” or ‘‘throw back” to ancestral characters. 
Cossar Ewart has greatly elaborated and adduced fresh evidence 
in support of this view; in his opinion primeval horses were clothed 
in “striped khaki”, with short 
forelock and hog-mane (as in 
} 
Fig. 1170.—Head of “‘ Matopo”, Prof. Cossar Ewart's Zebra (Equus Burchelli), and of a Norwegian Pony 
the prehistoric drawings). Fig. 1170, which Professor Ewart has 
kindly permitted me to borrow from his book (Zhe Penycutk Ex- 
periments), shows how the head-stripes possessed by a particular 
Norwegian pony compare with those on the head of a Zebra, an 
animal which might almost be described as a striped and hog- 
maned latter-day horse. The following quotation is taken from 
the book just mentioned :—‘‘We can only guess as to the colour of 
the remote ancestor of the horse, but nearly all who have made a 
special study of the subject have come to the conclusion that the 
