YOUNG SALMON, A PARE. 77 



naturalist has taken the great Lake Trout, or Mackinaw Salmon 

 {Salmo Amethystus), and the Brook Trout {Salmo Fontinalis), 

 which abounds in all small streams, wherein it is bred, in this 

 same form. 



There only remain to be accounted for some two or three 

 species : the great Grey Trout of Britain, the Sea Trout {Salmo 

 Trutta), and the Silver Trout {Salmo Lacustris), of continental 

 Europe; and on this continent, the Siskawitz {Salmo Siskawitz), 

 and the Lake Trout {Salmo Confinis), of Dekay, if the latter be 

 a distinct fish from Amethystus. 



No especial search has been instituted for the fry of any of 

 these fish last named ; so that the non-discovery goes no way to 

 prove their non-existence ; on the contrary, all analogy goes to 

 show that they will be discovered in time. 



As it now stands, of fourteen the most strongly-marked 

 Salmonidce, nine have been clearly traced to this form ; and the 

 five missing species are either analogous, as the three European 

 species, or closely congenerous, as the two American Lake 

 Trout, to one species Amethystus, which is shown to be no 

 exception to the rule. 



Every migratory species of Salmo is found in this stage ; and 

 one of the five or six non-migratory. All analogy, therefore, 

 goes to show that these species will be found, on research, not 

 to deviate from the rule of their order. 



Mr. Shaw goes farther, and argues that no such perfect fish 

 as the Parr exists ; and that all the fish so named by different 

 observers are in truth the young of different species of the 

 Salmon family. 



Against this fact, Mr. Yarrel reclaims ; and justly remarks 



