10 SUPPLEMENT 



THE GUASENGISHU ORIBI 



(Oribia microdori) 



The skull of a male oribi from the Guasengishu plateau of British 

 East Africa is described by Mr. N. Hollister (Smithsonian Miscell. 

 Collections, vol. Ivi. No. 2, p. 4, 1910) under the above name. It 

 indicates a large species characterised by the relatively small size of 

 the cheek-teeth, which occupy a smaller space than those of species 

 with absolutely smaller skulls. A skull from the Lake Region which 

 came under my own notice in 1911 presented a similar feature ; its 

 horns measured 5^ inches in length, or rather more than in the type 

 specimen. 



LANG'S DIK-DIK 



(Madoqua langi] 



This species, which was named by Dr. J. A. Allen in the 

 Bulletin of the American Museum of Natural History for 1909 

 (vol. xxvi. p. 153), is described as being indistinguishable in the 

 colouring of the upper-parts from Kirk's dik-dik (supra, p. 192), but 

 with the lower surface pale fawn instead of clear white in front and 

 dirty white behind, while the cheeks and the sides of the neck are 

 tawny instead of yellowish grey, and the crown of the head is more 

 strongly varied with yellowish rufous. The two species are, however, 

 best distinguished by the characters of the skull ; that of M. langi being 

 much the larger of the two, with bigger teeth, relatively as well as 

 absolutely. The lower line of the muzzle of the skull is straight 

 instead of arched, as in kirki, and the nasal bones are nearly three 

 times as large as those of the latter, thus leading to the elongation of 

 the fore-part of the skull generally. The type specimen was obtained 

 at Elmenteita, British East Africa, at no great distance from the habitat 

 of M. cavendishi. Although the type of the latter indicates an 

 immature individual, yet the skull is much larger than that of the 

 present species, while the skin is differently coloured, being dark fawn 

 above in place of yellowish grey. 



THE BEIRA 



(Page 278) 



Mr. Pocock (Proc. Zool. Soc., 1910, p. 878) regards the beira as 

 related to the dik-diks, and not to the gazelles. 



