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Show 187L] DR. J. E. GRAY ON THE BUSH-BUCKS. 589 drawings, I am inclined to think that a specimen of Scopophorus (probable S. montanus, which is found in W . Africa) was the origin of his species. No species of Cephalophus, as yet observed, has any knee-tufts. The species may be thus arranged geographically :- West Africa. East Africa. South Africa. G. splendidula. Guinea. 67. irrorata. Natal. 67. nictitans. 67. campbellice. S. Leone. T. altifrems ? 67. burchellii. Terpone longiceps. Ga- C. natalensis. Natal. _ C. pygmceus. boon. C. madoqua. Abyssinia. C. melanoprymnus. Ga- C. melanorheus ? boon. C. bicolor. Natal. C. sylvicultrix. S. Leone. C. ogilbyi. Fernando Po, Gaboon. C. badius. S. Leone. C. rufilatus. Gambia. C. dorsalis. S. Leone. C. niger. Guinea. C. nigrifrons. Gaboon. C. coronatus. Gambia. C. whitfieldii. Gambia. C. maxwellii. C. melanorheus. C. punctulatus. 1. GRIMMIA. (The Duykers.) Horns elongate, more or less erect. Ears elongate, acute, covered with short hair. Fur soft, with some under-fur. Skull elongate ; nose compressed ; forehead flat, on the same plane as the nose; nasal oblong, elongate. (Peters, Mossamb. t. 41. f. 1, t. 42. f. 1, skulls.) . . This genus appears to contain two groups of species, characterized by the skull, as I pointed out in the ' Catalogue of Ungulata in the British Museum,' p. 78. The former group contains four species, having different geographical distribution, and the latter at present only one. The three species above referred to may be only geographic variations ; but Mr. Layard and other naturalists who have lived in Africa assure m e that they keep distinct, and they show no inclination to change when bred in the Zoological Gardens (see P. Z. S. 1867, p. 277). * Head short; suborbital pit large, concave; intermaxillaries reaching to the edge of the nasals; nose-hole moderate, sides nearly parallel. 1. GRIMMIA NICTITANS. (The Cape Duyker.) Cephalophus grimmia, Gray, Cat. Ungul. B. M. p. 78. Fur yellow-brown ; forehead yellowish bay ; nose blackish ; underside of body rather paler. Young rather greyer. Hab. South Africa : Cape of Good Hope. |