136 



ANIMALS OF LAND AND SEA 



by a dolphin or a shark, whatever it was that frightened the 

 flying-fish away. The oil has now become so scattered that 

 its effect is lost, and the fisherman sails away to try their luck 

 elsewhere. 



There are three little flying-fishes that live in fresh water, 

 one, the most expert of them, in the rivers of western Africa, 



Figs. 368-369. 

 The Pine Saw-fly. 



367 "^l 363 



Figs. 357-367. Fleas. 



For explanations of the figures see p. xxii. 



and the other two, which are only able to make short flights, 

 in eastern South America. 



Flying-fishes are no new creation, for as far back as the 

 Triassic seas there were at least three kinds, in some respects 

 much better adapted for flight than are those of the present 

 day. 



Brief mention must be made of those so-called flying-fishes 



