Mr. E. Scliwarz on Afric\n Ungulates. 491 



LVII. — Notes on African Ungulates. 

 By Erxst Schwakz. 



I. — The Classification of the Duikers. 



In the ' Book of Antelopes ' all the Duikers were incliuled 

 in oiie genus, Cephalophus. Since then, however, the number 

 of " species " has been enormously increased, and several 

 subdivisions have been proposed. In 1899 O. Neumann^ 

 pointed out that the steppe forms should be placed in a 

 separate genus, Syivicapra, Ogilby, their horns being more 

 erect than in the other species, and the females usually 

 lacking them. Pocock f has revived Gray's genus Guevei 

 for the small species maxwelli and me/anorrhcus, which have 

 no inguinal glands. Finally, in 1907, Dr. Knottnerus- 

 Meyer X has divided the genus, which he gives family rank, 

 into two subfamilies with ten genera, most of which are 

 very heterogeneous. A recent revision of the genus shows 

 that four genera {Syivicapra, Cephalophus, Guevei, and 

 Cephalophulu) should be recognized. Of these, Syivicapra 

 appears to be most closely allied to the Cephalophus natalensis 

 group, and Ceyhulophula is certainly nearly related to 

 Cephalophus dorsalis, as Thomas § has shown ; the presence 

 of lieel-tufts, the Droad nasal chamber, the sagittal ridge, 

 small preorbital fossae in the skull, and the transverse body- 

 stripes would, however, indicate that the separation of this 

 form is justified. The remaining forms can be arranged in 

 ten species, of which ogilbyi is the western representative of 

 callipygus and niger ot spadix. The relations of the other 

 species amongst each other are not quite clear at present, 

 but it has been thought advisable to publish the following 

 list for the time being. A general revision of the local 

 forms of most of the species pending, I have placed in each 

 group all the names referable to it, which should be regarded 

 as subspecies or synonyms of the species in questiou. 



I. Sylvicapra, Ogilby. „, 



Syivicapra, Ogilby, V. Z. S. 1830, p. 138 <S'. (jrimiuia. 



t'tphalophorus, Gray, List Mamm. \'>. M. p. \^2 (1843^. . »b'. yiiimniu. 



One species. 



* Sb. nat. Fr. p. 19 (1899). 



t l\ Z. t>. 191(J, ii. pp. 807-876. 



t Arch. f. Nalur^'. l.vxiii. vul. i. pp. 4i' 4> (1907). 



§ 1*. Z. .s. 1891', p. A-2'>. 



