of a mare which produced successively three foals without tails; so that a
tailless race might have been formed like the tailless races of dogs and
cats. A Russian breed of horses is said to have curled hair, and Azara
(2/26. 'Quadrupedes du Paraguay' tome 2 page 333. Dr. Canfield informs me
that a breed with curly hair was formed by selection at Los Angeles in
North America.) relates that in Paraguay horses are occasionally born, but
are generally destroyed, with hair like that on the head of a negro; and
this peculiarity is transmitted even to half-breeds: it is a curious case
of correlation that such horses have short manes and tails, and their hoofs
are of a peculiar shape like those of a mule.

It is scarcely possible to doubt that the long-continued selection of
qualities serviceable to man has been the chief agent in the formation of
the several breeds of the horse. Look at a dray-horse, and see how well
adapted he is to draw heavy weights, and how unlike in appearance to any
allied wild animal. The English race-horse is known to be derived from the
commingled blood of Arabs, Turks, and Barbs; but selection, which was
carried on during very early times in England (2/27. See the evidence on
this head in 'Land and Water' May 2, 1868.), together with training, have
made him a very different animal from his parent-stocks. As a writer in
India, who evidently knows the pure Arab well, asks, who now, "looking at
our present breed of race-horses, could have conceived that they were the
result of the union of the Arab horse and African mare?" The improvement is
so marked that in running for the Goodwood Cup "the first descendants of
Arabian, Turkish, and Persian horses, are allowed a discount of 18 pounds
weight; and when both parents are of these countries a discount of 36
pounds (2/28. Prof. Low 'Domesticated Animals' page 546. With respect to
the writer in India see 'India Sporting Review' volume 2 page 181. As
Lawrence has remarked ('The Horse' page 9), "perhaps no instance has ever
occurred of a three-part bred horse (i.e. a horse, one of whose