THE WHALES 71 



which a number of porpoises had swum. When they 

 found themselves trapped, they turned and swam up the 

 bay, then turning came on at full speed and reaching the 

 boats, despite the shouts of the men, leaped bodily over 

 them and escaped. 



Several cetaceans are found in fresh-water streams ; 

 one, the Inia, swims up the Amazon as far as Bolivia. It 

 is but seven or eight feet long and has a long, narrow beak. 



Another form, the Susu, is found in the Ganges and 

 other streams of India. 



