GYMNOTUS, OK ELECTRIC EEL. 



003 



powers is evidently spontaneous, and exhausts the nervous 

 energy. Like voluntary muscular effort, it needs repose, and 

 the creatures require an abundance of nourishment and rest 

 before a fresh accumulation of electricity is produced. 





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INDIAN MUUt OF CATCHING KI.ECTHIC KKI.S. 



In the dry season they form deep circular holes for them- 

 selves in the mud of water-courses, and marshes which remain 

 tilled with moisture, and they are thus able to support exist- 

 ence in their usual localities, while alligators and turtles have 



