20 
Proceedings of Royal Society of Edinburgh. 
DESCRIPTION OF FIGURES. 
[SBSS. 
Plate 1. 
Fig. 1. — Head and shoulders of the mouse-dun Shetland dam of 
the Scottish Tarpan. In the form of the head, position of the eyes, 
and distance between the eyes and the nostrils this mare resembles 
Prejvalsky’s horse. A yearling filly, out of this mare by a 
Hebridean pony, instead of resembling a Tarpan, strongly suggests 
a Celtic pony. 
Figs. 2 and 3. — The mouse-dun Tarpan-like cross between the 
Shetland mare (fig. 1) and a black Welsh pony. This pony, 
though a cross, looks as if it belonged to an old-established race. 
It has a striking, well-formed, massive head, well-placed ears, full 
eyes, good quarters, and excellent limbs. The mane is, however, 
short and semi-erect, while the tail consists of three kinds of hair 
which differ in structure, thickness, colour, and arrangement. 
From photographs taken September 1905. 
Plate II. 
Fig. 4. — Hind quarters and tail of a three-year-old wild mare 
(E. prejvalskii) from a photograph taken in September 1905. 
The hind quarters and limbs are better formed than in the male 
wild horse (page 9) and the dorsal band is more distinct. In the 
upper part of the tail the hair, light in colour and relatively fine, 
o-rows obliquely outwards from the caudal portion of the dorsal 
band ; the hair of the middle part of the tail, darker and stronger 
than that of the root, lies nearly parallel with the dock and reaches 
to the level of the hocks; the hair of the tip, black, coarse and 
scanty, but long enough to reach the ground, emerges from within 
the hair forming the middle part of the tail. Like the hair of the 
mane, the light hair at the root of the tail is shed annually. 
Fig. 5. — Tail and hind quarters of the Scottish Tarpan from a 
photograph taken at the same time as fig. 4. As in the wild mare 
the hair of the tail consists of three portions. The basal portion 
only essentially differs from the corresponding portion in fig. 4, 
by being of less extent and lighter in colour, the middle portion 
is also lighter in colour and more plentiful than in the wild mare, 
while the hair growing from the end of the dock in the Tarpan 
very closely agrees in colour and amount with the terminal portion 
of the tail in Prejvalsky’s horse. 
Fig. 6. — Tail of a typical yellow dun Celtic pony, from a 
photograph taken in August. 
Fig. 7. — Tail of the same pony, from a photograph taken in 
January. 
In fig. 7 the tail-lock is seen at its maximum growth ; in fig. 6 
a new crop of hair is growing to take the place of the long winter 
hairs which were gradually shed during the summer. 
