THE BEAIN OF FISHES. 219 



to the degree of manifestation of the intellectual 

 faculties. Now, the brain of fishes is remarkable 

 for its small size ; and, of the various parts of 

 which it is composed, the hemispheres are the 

 least. Hence we have good reason for assuming 

 that, as intellectual beings, fishes do not merit a 

 higher position than that in which they have 

 been placed by the naturalist. A few instances 

 are recorded which seem to exhibit a power of 

 association of ideas on the part of the fish; for 

 example, their approach to the margin of a stream 

 or pool to be fed ; but this can only be regarded 

 as one of the humblest of the mental manifes- 

 tations ; and they would be as likely to advance 

 towards an enemy as a friend if the position of 

 the stranger corresponded with that of their ac- 

 customed feeder. 



Sensation, like intellect, resides in the hemi- 

 spheres of the brain, and the inference deduced 

 from the smallness of these organs appears to 

 be just with regard to the faculty in question. 

 Fishes are as deficient in sensation as they are 

 abounding in motion ; but the two faculties have 

 no necessary connection with each other ; few of 

 the motions of the fish are due to sensation, and 

 almost as few to the will ; therefore, motion alone 

 cannot be taken as an index of sensation. 



The mobility of fish is an obvious quality of 

 these animals, and the instrument by which 



