184 BAMBLES OP A NATURALIST, 



nates their movements. This ganglion, although 

 completely isolated, comports itself therefore like a 

 perfect brain. 



Hence we may see how the study of the lower 

 animals leads us to ideas which are apparently very 

 different from those that are to be deduced from the 

 exclusive study of the higher animals. Science, 

 however, does not on that account change, but it 

 simply becomes more complete, and, by revealing to 

 us new horizons, it daily enlarges and satisfies more 

 and more the noblest aspirations and requirements of 

 human intelligence. 



