244 GREVY'S ZEBRA CHAP. 
animal than the Horse. Mr. Tegetmeier calls attention to a 
donkey living in 1893 which had been ridden fifty-five years 
previously. The Horse, on the other hand, lives not much more 
than twenty-five years. 
A second species of African Wild Ass, £. somalicus,' is distin- 
guished by its greyer colour, by the absence of the shoulder stripe, 
by the very faint development of the dorsal stripe, and by the 
presence of numerous cross stripes upon the legs. It has, too, 
smaller ears, and a longer and more flowing mane. Mr. Lort 
Phillips, an experienced naturalist and traveller, saw a herd of 
these Wild Asses in Somaliland, which he regarded as being of 
quite a new species. A living example in the Zoological Society’s 
Gardens led Mr. Sclater to an identical conclusion, which was 
supported, as he pointed out, by the fact that this Ass has a 
different range to the African or Nubian Wild Ass. 
Of the Zebras three species are usually allowed; these are JL. 
zebra, the “ Mountain” or “ Common” Zebra, L. burchelli, EL. grevyt, 
as well as 2. quagga. Professor Ewart thinks that the Common 
Zebra, Burchell’s, and the Quagga are not very distinctly marked 
off from each other. No one, however, has any doubt of the 
distinctness of #. grevyi. This latter differs from the rest in its 
larger size, in the large head and ears, and in the marked hairiness 
of the ears. It would seem to be a primitive type of Zebra, if 
the fact that the occasional reversion of hybrids to a parent 
form be allowed; for Professor Ewart found a cross-bred Zebra to 
present several characteristics in the face-marking of this, the 
finest of the Zebra tribe. Only four specimens of 4. grevyi have 
been exhibited alive in Europe—two in Paris, and two in the 
Zoological Society’s Gardens in London. The latter were presented 
to Queen Victoria by King Menelek of Abyssinia. The species was 
named by Professor A. Milne-Edwards in honour of a late President 
of the French Republic, from an example also sent by King 
Menelek. 
The Common Zebra has closer and darker stripes than Bur- 
chell’s, but not quite so close as in #. grevyi. It has also a very 
characteristic arrangement of stripes on the withers in the form 
of a gridiron. This latter is wanting in both the other species. 
In #. grevyi, in fact, this part of the back is white. £#. zebra 
has also a dewlap in front. #. burchelli has fewer and broader 
1 Proc. Zool. Soc. 1884, p. 540. 
