GENERAL DESCRIPTION. 143 



THE SISKAWITZ. 



NORTHERN LAKE TROUT. 



Salmo Siskawitz — Agassiz. 



This fine fish, which is second only in size to that last 

 described, was discovered so recently as last summer, during 

 a trip to the upper lakes for scientific purposes by Professor 

 Agassiz, to whose courtesy and kindness I owe the power of 

 including it in this work, as it has not up to this time been 

 described or figured in any book of natural history. A journal 

 of that torn" is at this moment passing through the University 

 press at Harvard, which will comprise a fuU account of this, 

 and several other previously nondescript fishes, together with 

 accurate and beautiful lithographic illustrations by Sonrel ; and 

 to this, for fuller information, and especially for accounts of 

 several species which do not come within the limits of this 

 work, I refer my readers, certain that they will derive both 

 pleasure and profit from the perusal. 



The Siskawitz, in its colouring and general appearance, as 

 regarded by an uninstructed eye, bears a very considerable 

 resemblance to the Mackinaw Salmon, or Namaycush, par- 

 ticularly to that accidental variety of it which I have described 

 above as the IVuite de Greve ; and is found in the same waters 

 with it, most abundantly in Lake Superior and Lake Huron, 

 but more or less commonly in all the lakes above the Falls of 

 Niagara. In Ontario, and, as it is beheved, in the smaller 



