272 FISHES. 



by the large ninnber of anal rays (16), has been lately 

 introduced into Eastern streams. 



** Species not anadromoiis, living entirely in fresh water or only 

 occasionally passing down to the sea. (Trout.) 



f In flowing fresh water, retiring to deeper places in winter; 

 red-spotted. 



3. S. fontinalis, Mitchill. Brook Trout. Speckled 



Trout. Mouth wide; teeth moderate; body olivaceous, 



variegated with blackish, with numerous red spots; 



lower fins usually orange with black and white marginal 



bands; dorsal with black sjDots; colors varial3le; young 



barred; D. 12; A. 12; lat. 1. 200. A well known and 



beautiful fish, in clear brooks from the French Broad R. 



to the Arctic regions. 



f f In deep rivers or lakes, ascending shallow streams to spawn. 

 a. Red-spotted. 



4. S. oquassa, Grd. Blue -Back Trout. Oquassa. 

 Slender, "the most graceful of all the trouts;" blue or 

 bluish above; sides and below silvery in female, orange 

 in male; sides spotted with orange in both sexes; upper 

 fins bluish, bordered with orange; lower fins fiery orange, 

 margined with white. Oquassa L. and other lakes in 

 Maine. 



aa. Black-spotted. 



5. S. sebago, Grd. See ago Lake Trout. Uniox 

 River Trout. Every where black-spotted; scales quite 

 large; D. 14; A. 10; V. 10; lat. 1. 115. Sebago L., 

 Union R., and other waters in Maine. [S. gloveri^ Grd.) 



ff f Trout living in deep fresh water lakes, coming to the shores 

 to spawn in shallow water ; never entering running brooks 

 or passing to the sea. 



<J. S. namaycush, Bloch. Mackinaw Trout. Great 

 Lake Trout. Stout; head very large, 3^ in length; 



