MAMMALIA 



99 



wider distribution, being absent only from the shores of the East 

 Indies and Africa. They are also found in some inland seas, as 

 the Caspian, the Sea of Aral, and Lake Baikal, which is one of 

 the proofs that these were formerly connected with the Arctic 



Fig. 66. Pinnipedes. i, Eared Seals (Otaria}. 2, Common Seal (Phoca] 



Ocean. Like the sea-lions, they are adapted for preying upon 

 fish. Five species of seal are known to British waters, of which 

 the Common Seal (Phoca vitulina] may be mentioned. The 

 commonest sort in the seas of the far north is the Greenland Seal 

 (Phoca Grcenlandica), one of the chief victims to seal-fishers. 



Order 6. WHALES AND PORPOISES (Cetacea) 



The Cetaceans are mammals which are completely adapted 

 for an aquatic life, being so much modified for that purpose as to 

 be commonly mistaken for fishes, which they superficially resemble 



