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with that part of the nervous system. 

 We have also equal reason to believe, 

 that neither such perception nor intelligence 

 is requisite for the mere functions of life, 

 for these appear to be carried on as ef- 

 fectually in animals that have no brains, 

 riay, in those which seem destitute of any 

 nervous system, as in those which possess 

 such organs. Indeed, many of the most 

 vivacious and irritable animals have the 

 least nervous system. The nerves in the 

 lower order of animals, that have no 

 common sensorium, may contribute to 

 produce effects, which, in tracing the as- 

 cending series, I have endeavoured to 

 express by the words concurrence of im- 

 pressions and actions ; because intimations 

 of impressions and actions occurring in 

 one part may be communicated to others 

 by these inter-nunciate chords, as Mr. 

 Hunter called them, in cases where 

 G 2 



