FISHES OF LAKE SUPERIOR. 329 



That trouts are not more influenced by physical conditions than 

 -other animals, is apparent from the fact that there are lakes of small 

 extent and of most uniform features, in which two or three species 

 of trout occur together, each with peculiar habits ; one more migrar 

 tory, running up rivers during the spawning season, etc., while the 

 other will never enter running waters, and will spawn in quiet places 

 near the shore ; one will hunt after its prey, while the other will wait 

 for it in ambuscade ; one will feed upon fish, the other upon insects. 

 Here we have an example of species with different habits, where 

 there would scarcely seem to be room for diversity in the physical 

 condition in which they live ; again there are others living together 

 in immense sheets of water, where there would seem to be ample 

 scope for diversity, among which we observe no great differences, as 

 is the case between the Siscowet and the lake trout in the great 

 northern lakes. 



If these facts, statements and inductions were not sufficient to 

 satisfy the reader of the correctness of my views, I would at once 

 refer to another material fact, furnished us by the family of Salmon- 

 idge, namely, the existence of two essential modifications of the true 

 type of trouts, occurring everywhere together under the same cir- 

 cumstances, showing the same general characters, backbone, skull, 

 brain, composition of the mouth, intestines, gills, &c., &c.,but differ- 

 ing in the size of the mouth, and in the almost absolute want of 

 teeth, these groups being that of the whitefishes, Coregoni, and that 

 of the true trouts, Salmones. 



Now I ask, where is there, within the natural geographical limits of 

 distribution of Salmonidte, a discriminating power between the physi- 

 cal elements under which they live, which could have introduced those 

 differences ? A discriminating power which, allotting to all, certain 

 characters, should have modified others to such an extent as to pro- 

 duce a])parently different types under the same modification of the 

 general plan of structure. Why should there be, at the same time, 

 under the same circumstances, under the same geographical distrib- 

 tion, Avhitefishes with the habits of trout, — spawning like them in the 

 fall, growing their young like them during winter, — if there were not 

 an infinitely wise, supreme Power, if there were not a personal God, 

 who, having first designed, created the universe, and modelled our 



