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Show 324 MR. O. THOMAS ON THE DWARF [Apr. 3, characters that divide them are practically those brought out by Dr. Giinther in his description of the latterl, at least so far as the skulls and teeth are concerned. Skull of Madoqua guentheri, side view. Reduced. The first species to be described belongs to the kirki section, and of this, which I propose to name in honour of Dr. Giinther, who first described the remarkable cranial peculiarities of the members of the section, the Museum possesses the following material:- a. Immature skull, 3. Central Somaliland. E. Lort Phillips. B.M. 86.11.19.22. b. Adult skull, 2- Central Ogaden, 3000 feet, Aug. 1893. Capt. H. G. C. Swayne. 94.2.21.18. Type. c, d. 2 ad. skins, $. Central Ogaden, 3000 feet. Aug. 1893. Capt. H . G. C. Swayne. 94.2.21.16,17. Taking as the type the skull b, which in all probability belongs to one or other of the skins c, d, the species may be briefly diagnosed a s :- MADOQUA GUENTHERI, sp. n. Essential characters of M. kirki, but the lower, premaxillary part of muzzle much longer and narrower, while the nasals are much shorter. Tip of nasals, and also the front edge of the upper part of the secondary process of the maxillae, where it meets the nasals, level with the front edge of Pjj§ instead of pJ2. Pre-maxillae not reaching to nasals. Breadth of muzzle halfway between gnathion and pJ2 less than a quarter the distance 1 P. Z. S. 1880, p. 17. a The skull mentioned by Sclater, P. Z. S. 1886, p. 504. The skin referred to at the same time, as is clearly shown by its size and other characters, did not really belong, as was supposed, to this skull, but to another, younger one (86.11.19.3), and is referable to the species described below as M.phillipsi. |