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Show 114 MR. R. LYDEKKEK ON AN ASIATIC IBEX. [Feb. 20, p. 185, 1898). The skin of this ram was of a greyish-brown colour above, with a light saddle-shaped patch on the back, a white caudal disk, which did not include the tail, and the legs below the knees and hocks pure white, as were the under-parts. Above the caudal disk was a dark brown band ; the shoulders and thighs were as dark as the back ; and on the nape of the neck was a tuft of very long slate-coloured hair, which was dark brown at the roots. This tuft was also present in a female skin; a much Male of Littledale's Sheep (Ovis sairensis), in winter coat. shorter one occurred in a female head of 0. amnion, but it was absent in 0. poli. From the latter in winter dress the present specimens also differed by the dark shoulders and thighs. The development of a white caudal disk in the winter coat alone was another peculiarity of 0. sairensis. The specimens were said to have been obtained in the Irtish valley, which drains the Semi-palatinsk Altai. In this connection Mr. Lydekker desired to call attention to an error in his work entitled ' Wild Oxen, Sheep and Groats of All Lands,' where it was stated that the face and lower part of the legs of 0. amnion were always white, whereas they were so only in the typical race during summer, and then might be better described as dirty white. Mr. Lydekker likewise exhibited the skulls, horns, and skins of a male and female Ibex obtained with the preceding specimens which he thought might possibly belong to Capra sibirica dauvergnei. In the ram the general colour of the fur was light brown with a |