128 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



the fore legs, which in England are spoken of as warts or chestnuts. » And a little 

 further below, on the next page in the diagnose the author quoted expresses him- 

 self as follows: » Warts on fore legs very small ». Although the » warts* are smaller 

 than those of the Zebras of the hurchelli group, such a general statement as this 

 must, however, be taken cum grano salis as will be seen from the following measu- 

 ments of these organs in my specimens. In one of them, an old stallion, they may 

 be termed small as the diameter of the wart on one foreleg is only 8 mm. in diame- 

 ter, but on the other it is 12 mm. In the next specimen the wart is 15x8 on one 

 side and 18x14 on the other. In a third specimen it is 29x17 on one side and 

 32x18 on the other, and in a fourth about 34x18 on both sides. In these latter 

 cases the warts hardly can be termed »minute». The great variability in size dis- 

 played in these specimens is quite remarkable because, in spite of the fact that 

 these organs probably must be regarded as rudiments, their relative size, presence or 

 absence has been regarded as a very important characteristic, a view which to some 

 degree now must be modified. 



The ergots are always very large in my specimens of Grevy's Zebra and have 

 a diameter measuring from 30 to 40 mm. 



As has been stated in the literature, the mane of the young foal of Grevy's 

 Zebra is continued as a crest all along the back to the root of the tail. This dis- 

 appears with age, and in the old individuals there is nothing left of this juvenile 

 crest on the back. But in a young adult stallion remains of this crest are to be 

 found. The hairs of the black stripe on the posterior back (but not anteriorly) attain 

 a length of about 4 cm. and are thus strikingly longer than the very short hair of 

 other parts. 



The collection now described contains two fine stallions and a mare of Grevy's 

 Zebra from the southern side of Guaso Nyiri near Lekiundu river and a stallion 

 from the thornbush country north of Guaso Nyiri at the water-place of the Rendiles 

 called Njoro. All these specimens are alike in having the upper or dorsal portion of 

 the tail-tuft more or less white and the under or ventral portion black. The black 

 stripes on the sides of the neck are much broader than the white. These characte- 

 ristics are thus in accordance with those given for t>E. g. faurei^, and I have there- 

 fore mentioned this name but with hesitation, as I do not know, if it really belongs 

 to a different race, or if is simply is synonymous with E. grevyi. The latter is the 

 more probable as the type-specimens for both names have a similar origin, as far as 

 is known, and the eventual difference in geographical distribution is as yet onl}'^ 

 hypothetical. 



The measurements of a male (Conf. PI. VIII Figs. 1, 2 & 3) and a female skull 

 of Grev3^'s Zebra from this collection are given in the following table: 



