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Show 576 MESSRS. W. E. DE WINTON AND F. W. STYAN [May 2, foramina 7, length of diastema 9*9, length of molar series 5*1, across molar series 7. Mandible-tip of incisors to condylar process 23*5, to coronoid 19*5, coronoid to angle 10*1 ; bulla, antero-posterior length 8. Molars in almost parallel rows. Upper incisors rather darker than lower, pale orange. The length of the tail in proportion to its size, and also the characters and general shape of the skull, show that this species is more closely allied to G. longicaudatus than to any of the other known forms; the size, however, is so much greater, that there can be no hesitation in distinguishing it under a separate name. The two specimens agree absolutely in every way. Mr. Styan compared one of the specimens with the tvpe of C. longicaudatus in the Paris Museum, and considers them perfectly distinct species. LEPUS SECHUENENSIS, sp. n. (Plate XXXII.) In the general pattern of the markings, the shape and length of the ears, and the texture of the fur resembling L. europceus. The fur of almost the whole of the upper surface has long black tips with a subterminal fawn-coloured band, and, owing to the coat being much waved, a very rich mottling is produced; the underfur is drab-white; the nape dull greyish brown; the shoulders and fore legs red-fawn ; the backs and bases of the outside of the ears blue ash-grey; the tips of the ears are edged with black, and there is a large spot of this colour extending an inch or more down the ears on the hinder surface ; the cheeks in front of the eyes grey ; the rump and thighs ash-grey ; the belly is pure white, but the fur is greyish at the extreme base ; the tail is rather long, dark grey above, the broad black line extending the whole length, but most of the hairs have white tips ; beneath, the hairs of the tail are grey for more than half their length, with pure white tips. Type in the British Museum, No. 99. 3. 1.19. Collector's note : " § , Dunpi, N . W . Sechuen, October, 1897; eyes yellow-brown." Another specimen obtained at the same time is not labelled. The skull of this Hare very closely resembles that of L. hyjmbius, Blanford, M a m m . Sec. Yarkand Mission, 1879, pl. iv. a. fig. 1, the only apparent difference being that it is rather larger in every measurement, its greatest length being 97 millim., or about a quarter of an inch longer than the figure, a difference of no value whatever. In describing this species as distinct, I am therefore relying solely upon external characters; the principal of which, in the absence of specimens of L. hypsibius for comparison, must be the colour of the ears and the tail-two very characteristic features among Hares ; in these two forms they are as distinct as it is possible to be. The pure French grey of the back of the ears and the large jet-black tips are particularly striking; the tail with the black upper |