130 ELECTRIC FISH. 



them. They fold themselves round their legs and 

 bodies, and by a series of electric discharges, so 

 benumb and torture the animals that they fall down 

 in the water, and are drowned. Great numbers 

 of mules are thus lost annually, in some situations 



Questions. 



By what means do fish move in the water 1 



Are these fins alike in number and situation on all kinds 

 offish? 



How many fins has the trout ? 



In what respect do the fins of the haddock and perch differ 

 from those of the trout! 



How are fish enabled to leap out of the water T 



Of what service is the air-bladder ? 



How is it filled with air 1 



Have any other animals any thing of this kind 1 



What singular provision have some fish for their defence 1 



In what way does this act upon the body ? 



What fish possess this singular means ? 



Where is the gymnote found, and what is observable in 

 animals when in its neighbourhood ? 



In what way do they destroy mules 1 



Gymnote. 



