FISH OF ONTARIO. . 63 



Eye small. Teeth rather small ; vomerines in two long, alternating" series, 

 about as long as the palatine series ; gill rakers short and stout ; about 

 twenty, on the first arch of which twelve are below the angle ; dorsal origin 

 much nearer to tip of snout than to base of caudal ; adipose fin very small 

 and narrow, over the beginning of the anal ; caudal fin moderately forked 

 in the young ; ventral origin midway between tip of snout and base of 

 caudal. 



D., II ; A., 12. Colour, olive green above, sides silvery, head, back, 

 dorsal and caudal fins profusely covered with small black spots, no red 

 between the rami of the lower jaw. 



I mention this fish because it has been introduced with marked suc- 

 cess into Lake Superior and tributary waters by the United States Fish 

 Commission, and specimens have been taken on our side of the lake, where 

 it is to be hoped it will find a congenial habitat, for it ranks very high as 

 a game and food fish, attaining under favourable circumstances a weight 

 of about twenty pounds. 



Genus CRISTIMOVER. (Lake Trout.) 



This genus contains one, or perhaps two, species, large, coarse 

 Charrs, distinguished from Salvelinus by the presence of a raised crest 

 behind the head of the vomer and free from the shaft ; this crest is armed 

 with teeth. The hyoid teeth constitute a strong cardiform band. The 

 typical species is a large Charr, spotted with gray, and found in the larger 

 lakes of eastern North America. 



(72) Lake Trout. Salmon Trout. Gray Trout. Togue. Tuladi. 



(Cristimover namaycush.) 



Body long ; caudal peduncle slender ; head long, its upper surface 

 flattened ; eye large, placed near top of head ; mouth very large, the maxil- 

 lary extending much beyond the eye ; the origin of dorsal midway between 

 tip of snout and root of tail ; caudal fin well forked ; adipose fin small ; 

 teeth very strong. 



D., g to II ; A., 9 to 1 1. Scales, about 200 on lateral line. 



The colouration is extremely variable, generally grayish, sometimes 

 pale and sometimes almost black, everywhere with rounded pale spots 

 which are often reddish tinged ; on the back and top of the head there are 

 fine vermiculations resembling those of the Brook Trout. The dorsal and 

 caudal with pale spots and dark markings. 



This species is found in nearly all the large lakes from New Bruns- 

 wick west to British Columbia and north from Labrador through the 

 Hudson's Bay country to Alaska. It is the largest species of the family 

 resident in fresh water, reaching a length of several feet and a weight of 

 sixty pounds or even more, though specimens exceeding twenty pounds 

 are now rare. 



