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Show 452 MR. P. J. JACKSON ON T H E [May 4, place called Taka, opposite the island of Patta. It appears to be very partial to the vicinity of cultivations, and particularly to ground formerly under cultivation but from time to time lying fallow, where I suppose it finds better feeding and also good covert. The Abyssinian Oribi, on the contrary, appears to avoid the proximity of mankind, and prefers for the most part the open valley ' downs' far away from habitations, though I have seen them quite close to cultivations in Nandi. To m y knowledge the latter antelope is not found east of the M a u plateau. It ranges from the borders of Lumbwa (possibly farther south) to Turkwel, and west to Lake Victoria. I have lately sent some skins and skulls of this beast to Dr. Bowdler Sharpe, all procured by myself between the Sio river, in Kavirondo, and on the M a u plateau up to 8000 feet. A very noticable peculiarity of both the species is that when disturbed and retreating they jump high into the air, and when ' landing' do so on their hind legs, and not, as other antelopes do, on their fore legs. 8. RAPHICERUS CAMPESTRIS (Thunb.). The Steinbuck is found throughout Masailand, but does not range to the west of Mau. 9. COBUS ELLIPSIPRVMNUS (Ogilby). I believe that the Common Waterbuck (C. ellipsiprymnus) does not occur north of the Athi plains and west of Mount Kenia. Lake Naivasha is about the southern limit of C. defassa. 10. COBUS DEFASSA (Riipp.). The only Waterbuck found in this district is C. defassa. I see in the list of mammals at the end of Gregory's book there is a ' C. ellipsiprymnus' mentioned from Njemps ! I think this must be a mistake, as I have lately returned from Njemps, where I saw many herds of Waterbucks, all of wdiich wTere Cobus defassa. Again, all the Waterbucks I have seen at Lakes Naivasha and Elmenteita were also C. defassa. There is no mistaking the conspicuous white rump of this beast. 11. COBUS THOMASI, Neumann. This antelope does not, I think, range east of Kabras in Kavirondo. It is plentiful in Kavirondo, along the banks of the Nzoia and Sio rivers, and is also very Jiumerous in Uganda and Toru, but how far west and north it extends I am not in a position to state. I believe that this beast is never found far from water. Personally I have seen a good many, and they were never more than a few hundred yards from water. It was this fact that led me to believe formerly that they were C. vardoni, as I remembered what Selous had said about Vardon's Antelope being always found near water. |