112 AMERICAN FISHES. 



ABDOMINAL 

 AIALAOOPTERVGI1. SALMONID^E 



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 tour is at this moment passing through the University 

 press at Harvard, which will comprise a full account of this and several 

 other previously nondescript fishes, together with accurate and beauti- 

 ful lithographic illustrations by Sonrel ; and to this for fuller informa- 

 tion, 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 darive both pleasure and profit from the perusal. 



The Siskawitz in its coloring and general appearance, as regarded 

 by an uninstructed eye, bears a very considerable resemblance to the 

 Mackinaw Salmon, or Namaycush, particularly to that accidental 

 variety of it which I have described above as the Truite de Greve ; 

 and is found in the same waters with it, most abundantly in Lake 

 Superior, a few in Lake Huron near the Sault St. Marie, but none in 

 St. Clair, Erie, or Ontario. And, it is believed, in the smaller inland 

 waters of New York and the Eastern States, it is unknown. 



The head, back and sides of the Siskawitz, above the lateral 

 line, are of dingy brownish olive, with a greener gloss on the upper 

 parts, irregularly blotched and clouded, rather than spotted, with 

 lighter circular or oval patches of the same color. Below the lateral 

 line the color is paler and more yellow, with clusters of the same spots 



