1902 - 3 .] The Wild Horse (Equus prjevalskii). 
465 
above and below the hocks, and small faint spots over the hind 
quarters — vestiges apparently of ancestral markings ; but in the 
hybrid there are neither indications of stripes across the hocks or 
withers, nor spots on the quarters. 1 
In having no indications of bars on the legs or faint stripes, 
across the shoulders, the hybrid differs from Prjevalsky colts ; it 
also differs in having a longer flank feather, and in the facial whorl 
being well below the level of the eyes. As in the Kiang and some 
of the wild horses, the under surface of the body and the inner 
aspect of the limbs are nearly white. 
In the hybrid the front chestnuts (wrist callosities) are smooth 
and just above the level of the skin ; but instead of being roughly 
pear-shaped as in the Kiang, they are somewhat shield-shaped as in 
the Onager. In the wild horse the front chestnuts are elongated. 
In the Exmoor dam the hind chestnuts (hock callosities) aro 
27 mm. in length and 10 mm. wide. In the sire there is a minute 
callosity inside the right hock. In the hybrid the hind chestnuts 
are completely absent. In the absence of hock callosities the 
hybrid differs from the wild horse, in which they are relatively 
longer than in Clydesdales, Shires, and other heavy breeds of 
horses. In the hybrid, as in the sire and dam, there are smooth,, 
rounded fetlock callosities (ergots) on both fore and hind limbs. 
In the wild horse the hoof is highly specialised, the ‘ heels ’ being 
bent inwards (contracted) to take a vice-like grip of the frog. 
In the hybrid the hoof closely resembles that of the pony dam ; 
it is shorter than in the Kiang, and less contracted at the £ heels r 
than in the wild horse. 
The Kiang hybrid further differs from a young wild horse in 
the lips and muzzle, the nostrils and ears, and in the form of 
the head and hind quarters. 
The wild horse has a coarse, heavy head, with the lower lip 
(as is often the case in large-headed horses and in Arabs with 
large hock callosities) projecting beyond the upper. The nostrils 
in their outline resemble those of the domestic horse, while 
the long pointed ears generally project obliquely outwards, 
1 The complete absence of stripes in the Kiang hybrid is all the more 
interesting, seeing that the dam’s previous foals were zebra hybrids. 
Evidently the Kiang hybrid lends no support to the telegony doctrine. 
