FISHES 



THAT VISIT THE 

 UPPER TIDAL WATERS 



THE distribution and range of fishes is 

 one of the most interesting and puzzling 

 subjects that is presented to the ich- 

 thyologist, for, in connection with the 

 remarkable adaptability of fish to changes of habi- 

 tat, it must be remembered that during the glacial 

 period salt-water districts were, doubtless, changed 

 into fresh and vie a versa. Thus, untold centuries 

 ago, the conditions under which fish existed, were 

 subject to radical and complete reorganization, and 

 these modifications, so far as habitat and range are 

 affected, still continue, owing to the influence of 

 water-spouts and floods, the deposition of fish 

 spawn by aquatic birds in widely separated waters, 

 and the migration of some of the catfish, eels, and 

 others, which are able to travel overland to waters, 

 the trend of which finally carries them long dis- 

 tances from their former habitats. 



It will be noted that a number of fishes, the 

 general habitat of which is in the salt waters, and 

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