462 THE ORIGIN OF THE LIBYAN HORSE [CH. 



All these considerations point to the conclusion that when 

 the land-bridges were still unbroken between Europe and 

 Africa, at least one variety of Equidae, probably Equus stenonis 

 or some allied species (p. 10), had crossed over into the region 

 lying between that occupied later on by Equus caballus in 

 Europe on the one hand, and that by the Somali zebra on the 

 other, had there been still more specialised, had differentiated 

 its stripes and subsequently almost completely lost them, and 

 pari passu had assumed a nearly uniform bay colour. 



As Prof. Ewart's experiments have shown that it is most 

 improbable that the stripes on the foals of Sir Gore Ouseley's 

 chestnut mare, by the black Arabian, were due to infection 

 from her former mate the quagga, the stripes in these foals 

 are to be ascribed to the fact that the chestnut being seven- 

 eighths Arab had an inherent tendency to such markings, and 

 as she is said to have come from India, the frequency of the 

 occurrence of such stripes on well-bred Kattywar horses 

 renders still more probable such a tendency in her. Further- 

 more, as we have seen that on the Continent black sires 

 saturated with Arab blood frequently beget offspring with 

 stripes, a fortiori, there must have been a very strong tendency 

 to produce offspring with stripes in the black Arabian stallion 

 as well as in the chestnut mare. The fact that the quagga 

 hybrid was more striped than its quagga sire seems to indicate 

 that the stripes on the hybrid, especially those on its legs, were 

 due not merely to the quagga, but also to its dam ; the further 

 fact that her subsequent foals by the black Arabian were in 

 some respects more striped than the hybrid suggest that the 

 striping in their case may have been due to the dark black 

 Arabian as well as to the dam. 



The presence of stripes on the legs of the quagga hybrid, 

 though such were absent in the quagga, is completely paralleled 

 by the occurrence of stripes on the legs of hybrids bred by 

 Baron de Parana from a true Burchell zebra (with white legs) 

 and South American mares. As the latter are largely of 

 Andalusian, and consequently of North African blood, and as 

 South American horses constantly show stripes, the markings 

 on the legs of the hybrids may in part be due to their dams, 



