FAMILY SALMONIDiE -— COREGONUS. 249 



Color. Dusky above the lateral line ; silvery beneath it. Dusky lateral stripes, as in the 

 Labrax lineatus, or Striped Bass ; these are about six or eight in number. Pupils black ; 

 irides silvery. Opercles silvery, spotted with yellow. 



Length, 17-0. Depth, 5-0. Thickness, TO. 



Having mislaid my notes on this species, I am compelled to use the very bripf description 

 given by De Witt Clinton. It is a very distinct and beautiful species. According to Mr. 

 Clinton, it is nearly equal to any fish that swims, for exquisite and delicious food. It is among 

 fishes what the grouse or canvass back duck is among birds : the flesh is fine, white and 

 delicate. It appears to be peculiar to Otsego lake, and is daily decreasing in numbers. It 

 is rarely taken by the hook, but has been taken by the seine to the number of five thousand 

 at a draught. 



{EXTRA-LIMITAL.) 



C. tvilibee. (Richardson, F. B. A. p. 201.) Compressed; belly rounded. Scales large, oblong. A 



small plate of minute teeth on the tongue. Length 14 inches. Northern Regions. 

 C. quadrilateralis. (Id. p. 204.) Subcylindrical, quadrilateral. Scales rhomboidal. No teeth. Length 



18 inches. Polar Sea. 

 C. lucidus. (Id. p. 207.) Compressed. Scales transversely oval. No teetL Length 18 inches. 



Northern Regions. 

 C. harengw. (Id. p. 210.) Compressed ; back rounded ; abdomen slightly flattened. Three rows of 



microscopic teeth on the tongue. Length 12 inches. Lake Huron. 



Fauna — Part 4. 32 



