584 MANUAL OF ZOOLOGY. 



food to the mouth, and the nostrils are placed at its extremity. 

 It attains altogether a total length of from five to six feet. 

 Another species, with longer hair (T. villosus], inhabits the 

 Andes, and a still larger species (T. Malay anus) is found in 

 Sumatra and Malacca. In this last, there is no mane, and 

 the general colour is black ; but the back, rump, and sides of 

 the belly are white. 



Fam. 3. Palceotkeridtf. This family includes certain ex- 

 tinct Ungulates from the Eocene and Miocene Tertiary. They 

 are characterised by the possession of three toes to all the feet, 

 by having canines, and by the fact that the lower molars have 

 a doubly crescentic form. The canines are longer than the 

 other teeth, and the dental formula is 



. ._. /OT W 



33 i i 44 33 



The chief, if not the only, genus in this family is Palaotherium 

 itself. Several species of this genus are known, varying in size 



Fig. 251. Outline of Paleeotherium magnum, restored after Cuvier. Upper Eocene. 



from a sheep up to a horse. From the size and form of the 

 nasal bones it is deduced, with great probability, that the Palaeo- 

 there possessed a short movable proboscis or trunk (fig. 251). 

 All the known species of Palaotherium are Eocene or Miocene, 

 and the genus attained its maximum in the former period. 



Fam. 4. Solidungula or Equida. This family comprises the 

 Horses, Asses, and Zebras, characterised by the fact that the 

 feet have only a single perfect toe each, enclosed in a single 



