54 



VERTEBRATES: MAMMALS. 



whalebone, which are fringed on their inner edges. 



Its food is small marine animals. Swimming through 



schools of these, the Whale 

 takes millions into its mouth 

 at once, and strains off the 

 water through the whalebone 

 plates, lea\'ing the food in its 

 iiiouth. This Whale supplies 

 the world with whalebone, 

 and also furnishes more oil 

 than any other. Its home is 



in cool and frigid seas. 



The great Sperm WTiale, of the \\arm parts of the 



ocean, is full)' equal to the Right AWiale in size. The 



upper jaw has neither teeth nor whalebone, but the 



Fig. 70. — Skull of the Riglu 



Whale, showing the 



whalebone. 



Fig. 71. — Head of the Sperm Whale. 



lower has teeth. In the upper portion of the head 

 there are cavities filled with oil, which hardens when 

 cool and is known as spermaceti. The bod\- )'ields 

 sperm oil. Ambergris, a substance used by chemists 

 in making perfumery, is found in the intestines of this 

 Whale. 



The spouting, or blowing, is different in these two 

 Whales ; for the Right Whale has two blow-holes on 

 the top of the head, and the spout goes straight up or 



