BY WAY OF INTRODUCTION to. 



tion and protective markings, but I knew what 

 the " flash " meant. Keep your eye on the spot 

 to which you think your running worm is being 

 carried; a quick, almost imperceptible, " flash " 

 — strike, and you have him. 



Adherence to this principle has often helped 

 to fill a creel. 



Until one has seen it, it is difficult to realise 

 to what extent various forms of animal life 

 " flash " under the water. For example, light is 

 flashed from the glossy lustre of the cormorant's 

 plumage, while other divers depend upon special 

 white markings for this result. On the top illus- 

 tration of the plate facing page 20 a cormorant 

 is shown with a herring in its bill. The cor- 

 morant's black head is flashing silvery- white, 

 while the silvery herring is black. 



In the lower illustration a fish is flashing as 

 it evades the attentions of a seal. 



In conclusion it may fairly be asked whether 

 the observations made by the human eye are any 

 indication of what the fish sees. In structure the 

 eye of a fish differs very little from the human 

 eye, except that the cornea is flattened. Further, 

 fish cannot accommodate for near and far sight 

 so well as man. But I have not the slightest 



