48 Mr. R. I. Pocock on the 



once from both of the East-African forms established by 

 Mr. de Winton. 



(4) Equus Grevyiy Oustalet. 

 Equus Grevyi, Oustalet, ' La Nature,' x. p. 12, 1882. 



This species, the most northerly of the zebras inhabiting 

 Abyssinia and Somaliland, is strikins:Iy different from the 

 rest of the group (see figures in Proc. Zool. Soc. 1882, p. 721, 

 and 1890; p. 413). The flanks and quarters are covered with 

 a great number of narrow deep brown stripes separated by 

 still narrower interspaces. The belly is free from transverse 

 stripes as in the mountain zebra [E. zebra) ; but upon the 

 quarters there are no broad obliquely longitudinal stripes, 

 such as are seen in tl)e last-named species and the various 

 forms of E. Burchelh', the bands upon the upper half of this 

 area being vertical (transverse), resembling both in size and 

 direction those of the flanks ; on the lower half of the quarters 

 they assume a longitudinal direction, and are continued thence 

 on to the hind legs, which, like the fore pair, are closely 

 striped to the hoof inside and outside. Again, the spinal 

 stripe, narrow behind the withers, is very broad over t!ie 

 saddle and rump, but broader on the saddle, where it fuses 

 with the flank-stripes, than on the rump, where it is separated 

 by a very wide space on each side from the upper ends of the 

 quarter-stripes. The tail is not striped at the sides, but 

 spotted, and its tult is composed of black and white hairs. 

 Connected with the markings on the head tliere are two pecu- 

 liarities : — Firstly, the muzzle is not black, as in the other 

 species (? the quagga), but greyish, and not many shades 

 darker than the pale ground-colour of the rest of the head; 

 and, secondly, the stripes continued from the forehead on to 

 the nose usually fail to meet the muzzle-patches, being at 

 most connected with them by very fine lines. Lastly, the 

 nostril-patches are not black, as stated by Matschie (Zool. 

 Garten, xxxv. p. 71), but tan-coloured. 



So far as structural features are concerned, in addition to 

 the greater length of the face and ears as compared with the 

 other zebras, this species is quite peculiar for the minute size 

 of those bare patches of skin above the knee on the fore legs, 

 which in England are spoken of as warts or chestnuts. 



The British Museum has skins and heads of this species 

 from Berbera and from Durhi, Ogardain, 3000 feet alt., in 

 Somaliland {Capt. Sicoyne), as well as a mounted specimen 

 shot by Col. Paget in this same country. 



The subjoined table gives a summary of the chief characters 



