DOLPHINS. 



37* 



<3 



9 



FJG. 409. TKOOP OF DOLPHINS, MANATEE IN THE DISTANCE. 



The Cetaceans are divisible into three sections, two of which 

 are strictly inhabitants of the sea, and live upon marine animals ; 

 while the third, generally met with near the mouths of rivers, are 

 herbivorous, and present a manifest approximation to the terres- 

 trial Pachyderms. Of the two sections first mentioned, one is 

 distinguished by having the 

 head of ordinary proportions 

 when compared with the size 

 of the body, while in the other 

 the head is of enormous di- 



mensions. To the first section 

 belong the Dolphins and Nar- 

 whals ; the second includes 

 the Whales properly so called; 

 while the third comprehends the Manatees andDugongs. 



FIG. 410. BONES OF THE FIN OF A DOLPHIN. 



SECTION I. ORDINARY CETACEANS. 



The Dolphins (Dclphinus) have teeth both in the upper and 

 lower jaw, of the simplest structure and conical in shape. These 

 animals are the most carnivorous, and, in proportion to their size, 

 the most voracious of the class. 



242 



