38 VERTEBRATES: MAMMALS. 



The Camel is larger than the. horse, and stands very 

 high. There are two kinds, one with two large humps 

 upon the back, and the other with only one hump. 



The Llamas inhabit the Andes of South America, and 

 are much smaller than the Camel, being only four or 

 five feet high, and they have no hump. They live in 

 herds, and are tamed and used as beasts of burden. 

 The Alpaca is a variety of Llama with long woolly hair, 

 which furnishes material for valuable fabrics. 



WHALES, OR CETACEANS. 



These mammals live in the water, have their limbs 

 paddle-like and fitted for swimming, and their whole 

 appearance is fish-like ; but they are true mammals, 

 nourishing their young with milk, breathing air for 

 which they come often to the surface of the water, and 

 their blood is warm. Most of them are large, and some 

 of them are the largest. of living animals, and they are 

 covered with a smooth skin. They breathe through a 

 hole, or holes, on the top of the back part of the head, 

 and through these some kinds blow or spout water to 

 the height of thirty, and sometimes even to fifty feet. 



RIGHT AND SPERM WHALES. 



The Greenland or Right Whale attains the length of 



sixty or seventy feet. It has 

 no real teeth, but in the upper 

 jaw are rows of upright horny 

 plates, called whalebone, 

 which are fringed on their 

 inner edges. Its food is small 

 marine animals. Swimming 

 Fig. 70. Skull of the Right through schools of these, the 

 Whale, showing the whalebone. Whale takes millions into 



