410 DESCRIPTION (October, 



the pollock of this market, or the G. purpureus of my 

 memoir on the fishes of Newyork, 



The jaws and palate are armed with numerous and 

 acute teeth. The tongue itself is smooth, but its root is 

 toothed. 



Eyes very large^ with a yellow iris and black pupil. 



Tongue, palate and throat, of a smoky or sooty co- 

 lour. 



Nostrils double, and the opening near the eye, larger. 



Lateral line begins at the back of the neck, above the 

 gill-opening, and travels in nearly a direct course, with a 

 furrowed or channelled depression, unto the middle of 

 the tail. 



Vent nearer the head. Tail about even. Gill- cover 

 smooth and extending far back. 



A deficiency of teeth in the front of the upper jaw; 

 and a corresponding abundance of them in the front of 

 the lower jaw to fill up the gap, when the mouth is 

 closed. 



Colour of die back dusky or brown, with a brassy 

 hue, which is most conspicuous about the gill-cover and 

 thorax. 



Rays, Br. 8; Don 11—18—20; Caud. 34; An. 21— 

 19; Vent. 7; Pect. 15. 



ABDOMINAL. 



Salmo AMETHYSTus. GREAT TROUT of the Lakes. 



The specific character may be derived from the teeth, 

 which resemble crystals of amethystine quartz; and are 

 continued in a row, along the upper jaw, on the outside 



