Horse, Ass, and Tapir. 91 



the intestinal canal is of very great length. There are 

 two chief sub-orders of these hoofed animals, the first 

 consisting of such as have odd toes on their hind 

 feet, and unsymmetrical toes on the fore feet. Of 

 these odd-toed mammals, there are three living 

 types horses, tapirs, and rhinoceroses. The horse 

 and ass have only a single toe developed on each 

 limb, which corresponds to the third toe of ordinary 

 mammals. They have also a dentition of 



, 9 



6 i i 44 33 



The two best known forms are the horse and the 

 ass ; the former is characterised by its tail, hairy from 

 its base, and by the wart-like callosities on the inner 

 surface of its legs. Remains of horses are found in 

 the bone caves of Britain and of South America, as 

 well as in those of Continental Europe. The striped 

 races of the genus Equus are confined to Africa ; they 

 are the zebra, the quagga, the dauw, &c., and 

 are scarcely tameable. The wild asses inhabit 

 Western Asia, Fossil horses are known, exhibiting 

 all the intermediate grades of development of feet 

 from the single hoof of the common horse to the 

 Eohippus with four functional toes and a fifth rudi- 

 mentary one on the fore feet, and three toes behind. 



The tapirs, natives of Malaya and of South America, 

 are also uneven-toed ungulates, possessing three toes 

 on their hinder, and four (but laterally unsymmetrical) 

 toes on their fore feet They are characterised by 

 possessing a proboscis- like snout, and rather long 

 legs. In number the teeth are equal to those in a 

 horse. 



