490 ZOOLOGY SECT. 



small, the auditory pinnae well developed. The surface is devoid, 

 or nearly devoid, of hairs, and the skin is enormously thick and in 

 some species thrown into deep folds. The tail is narrow and of 

 moderate length. 



The Hyraxes are small, somewhat Rabbit-like animals, with 

 slender limbs and vestigial tail. There are four functional digits 

 in the manus and three in the pes, all provided with short, flat 

 nails, except the innermost of the pes, which has a curved claw. 

 The body is covered with soft fur. 



The Elephants, the largest of existing terrestrial Mammals, have 

 the limbs much more typically developed than in the true Ungu- 

 lates, there being five comparatively short digits, enclosed in a 

 common integument in each foot, all of them in the fore- and 



FIG. 1132. Indian Rhinoceros (Rhinoceros indicus). (From the Cambridge Natural History.) 



three or four in the hind-foot, terminating in a broad, flat nail 

 or hoof. The weight of the body is borne on an integumentary 

 pad forming the sole of the foot. The limbs are very stout and 

 pillar-like, and the thigh and leg when at rest are in a straight 

 line instead of being, as in the Ungulata vera, placed nearly at 

 right angles to one another a circumstance which gives a charac- 

 teristic appearance to the hind-quarters. The nasal region is 

 produced into a proboscis or " trunk," a mobile cylindrical appen- 

 dage, longer than the rest of the head, at the extremity of which 

 the nostrils are situated. There is in the male a pair of immense 

 tusks the incisors of the upper jaw. The eyes are small, the 

 pinna3 of the ears enormous. The tail is small, and provided with 

 a tuft of hairs at its extremity. The skin is very thick, and provided 

 with only a scanty hairy covering. 



