Tail uniformly covered with long hair; mane long and flowing: ears of moderate size: no dorsal line or transverse band.
E. Caballus, Desm. Mammal, p. 416. Flem. Brit. An. p. 27. Horse, Penn. Brit. Zool, vol.i. p, 1. pi. 1. Common Horse, Shaw, Gen. Zool. vol. II. p. 419. pi. 214.
Offering every variety of size and colour: generally bay, or chestnut-brown, more or less deep ; black, or grayish white: head long and tapering: teeth, incis. 6/6, can. (1-1)/(1-1) (seldom present in the mare), mol (6-6)/(6-6),= 40: ears erect and pointed, much smaller than in the next species: a naked callosity on the inside of the fore legs above the knee; another on the hind legs just under the knee.
Probably brought originally from Asia, where the species still exists in a truly wild state. A small variety occurs in the Highlands of Scotland, and in the Shetland Islands, half-reclaimed, but can scarcely be considered as indigenous. Period of gestation eleven months. Seldom more than one at a birth. Central incisors cast at the age of two years and a half, and replaced by permanent ones; the adjoining pair at three and a half; the remaining ones at four and a half; these last replaced more slowly than the others.