328 On the Cape Colony Quaggat. 



wide interval between tliis form and the typical DanieUi'ia to 

 a certain extent bridged by the specimen figured by Hamilton 

 Smith. On the other hand, Lorenzi may have been derived 

 from Burchelli by the widening and rufescence of the stripes, 

 and Greyi from Lorenzi by the almost complete obliteration 

 of all lines of demarcation between the stripes on the body 

 behind the shoulder. 



Thus the available facts seem to point to the conclusion 

 that the ruddiness of Cape Colony quaggas was acquired 

 by two totally different processes. In the case of Danielli by 

 deepening of the red of the ground-colour or interspaces and 

 the reduction in the length and width of the black stripes on 

 the neck and shoulder concomitantly with their suppression 

 on the body, the result being a chestnut- or bay-coloured 

 animal with narrow black stripes on its fore parts. In the 

 case of Greyi by an increase in the width and brownness of 

 the stripes, followed by their fusion and loss of definition on 

 the body, the result being a ruddy- brown animal marked with 

 narrow pale bands (the interspaces) upon the head, neck, and 

 shoulder. Finally, I do not see how to bridge the difference 

 between Lorenzi and quagga without reference to an inter- 

 mediate form which must have very closely resembled a 

 typical Burchelli. In that case the Cape Colony quaggas 

 have had a dual origin from a Burchelline quagga or quaggas; 

 and if this be so, how are we to regard them as a single 

 species distinct from JSurchelli? 



Tlie objection may perhaps be raised that this classification 

 of the Cape Colony quaggas does not include all the forms 

 represented by figures scattered through the literature, and 

 that a large number of the latter cannot be referred to any of 

 the types here named. For instance, the examples figured 

 from life in the ' Knowsley Menagerie,' though standing in 

 some particulars midway between the typical Quagga and 

 Grey's Quagga, are certainly distinct from both. It is the 

 assumed existence of such intermediate types as these that 

 justifies the subspecific rank assigned to the quaggas discussed 

 in this paper. 



EXPLA^\\TION OF THE PLATES. 

 Plate IX. 

 Edwards's Quag^ra {Equits qnagcfa, typical form). Reduced uncoloured 

 copy of the coloured plate, taken from life, of the typical Quagga 

 in Edwards's * Gleanings.' 



Plate X. 

 Dauiell's Quagga {Equvs qmujr/a Danielli, suhsp. n.). Reduced un- 

 coloured copy of the coloured plate, taken from life, of the 

 "Quahkah" in Daniell's ' African Scenery.' 



