Native Cbarrs 285 



son spots on the body, the only exceptions being 

 the Great Lake trout with grayish markings, and 

 the Arctic trout {Salvelinus arcturus), upon which 

 no reddish spots have been found ; further inves- 

 tigation will, doubtless, show that this peculiarity 

 of the latter charr does not exist, for reversals of 

 stated facts have occurred frequently in ichthyic 

 annals, and such is more likely in this case, 

 as the Arctic trout has the most northern habi- 

 tat of any of the salmonoids, and only a few 

 specimens have been examined by specialists. I 

 have on a previous page differentiated the charr 

 from the brown trout, the only salmon-trout hav- 

 ing persistent red spots in our waters. The loca- 

 tion of the teeth has been previously described as 

 serving for a mark of identification ; those on the 

 hyoid bone (base of the tongue) are said to be 

 always present in specimens inhabiting streams 

 south of New York, while they are only occasion- 

 ally found on trout living farther to the north. 



There are thirteen species and subspecies of 

 native charrs in American waters and two im- 

 ported species from Europe. They are classified 

 as follows : — 



The Great Lake trout, — Cristivomer namaycush (Walbaum) . 

 The Siscowet, — Cristivomer namaycush siscowet (Agassiz). 



