ORDER PERISSODACTYLA : ODD-TOED UNGULATES 



335 



half of the trunk. The legs, tail, and under surfaces were white, 

 with sometimes a short midventral dark line, and usually a black 

 spot behind the fetlocks. Individuals appear to have varied con- 

 siderably in the width and extent of the paler stripes and in the 

 amount of whitish on the rump, tail, and belly. These differences 

 have been made the basis of several subspecific names, but it is 

 now agreed that they are best considered as only variations of a single 

 species. Although Pocock earlier believed that the Quagga was 

 merely a southernmost form of the BurchelPs Zebra, and that certain 



FIG. 34. Quagga (Equus qwagga). After Standard Natural History. 



individuals nearly bridged the gap between the extremes, it has since 

 been shown that the two are doubtless separate species, and that the 

 Quagga, in addition to the well-marked color characters, was further 

 distinguished by cranial differences as well. For according to 

 Schwarz (1912b) the skull is the smallest of the three South African 

 species of zebras, and is characterized by its relatively wide zygo- 

 mata, narrower bony eye ring, broader forehead, greater separation 

 of the temporal ridges, the presence of a small suborbital pit, and 

 by having the posterior border of the nasals heart-shaped. While 

 such characters may be subject to individual variation, they may for 

 the present be regarded as valid. 



The Quagga seems first to have been brought to the notice of natu- 

 ralists by George Edwards, who in his Gleanings (1758) published 



