So much for the domestic Sheep; of other species of the genus _Ovis_ we have Marco Polo’s Sheep.[2] This splendid Sheep, one of the finest species of the genus, has horns, describing a spiral of about a circle and a quarter when viewed from the side, pointing directly outwards, and sometimes measuring as many as sixty-three inches from base to tip along their curve, and as much as four and a half feet from tip to tip. At the shoulder the animal measures just under four feet. It inhabits the high lands in the neighbourhood of the lofty Thian Shan mountains, north of Kashgar and Yarkand, not descending below an elevation of 9,000 feet above the sea level, often ascending much higher. It is on account of the rarefaction of the air in these regions that there is considerable difficulty in obtaining specimens which have been wounded, because Horses at these heights are much distressed in their breathing, whilst the Sheep are not so. Mr. N. A. Severtzoff, an eminent Russian naturalist, has described three or four other species closely allied to Marco Polo’s Sheep, which are smaller than it, from Turkestan and the district east of it. In this Sheep, during the winter, the sides of the body are of a light greyish-brown, changing to white below. There is a white mane all round the neck and a white disc round the tail. A dark line runs the whole length of the middle of the back. In summer the grey changes to dark brown. [Illustration: AMMON.] The OORIAL and the SHAPOO are bearded Sheep, from Ladakh and the Suliman range of the Punjab respectively, with large horns, which form not more than half a circle in the Shapoo and nearly a complete one in the Oorial. The colour of the Oorial is a reddish-brown above, paler beneath, the abdomen being white. A lengthy dark beard, reaching to the knees, fringes the whole length of the neck from the chin to the chest. The points of the horns are directed inwards. It is found at altitudes of 2,000 feet. The Shapoo is brownish-grey, white below, with a short brown beard. Its horns turn outwards at the tips. It is never found at altitudes lower than 12,000 feet. The MOUFLON at one time abounded in Spain, but is now restricted to the islands of Corsica and Sardinia. The species is a small one, of a brownish-grey colour, with a dark streak along the middle of the back, at the same time that there is a varying amount of white about the face and legs. The horns, present in the males only, are proportionately not large, curve backwards and then inwards at the tips. The tail is very short, in which respect they differ strikingly from the domestic Sheep, to which otherwise they are intimately related. The Mouflon frequents the summits of its native hills in small herds, headed by an old ram. Its skin is used by the mountaineers for making jackets. It breeds freely with the domestic species. [Illustration: AMMON.]