SALMONID^. — CV. 273 



bones of head strong; posterior point of juncture of 

 operole and sub-operole much nearer the upper end of 

 the gill opening than to the lower anterior angle of the 

 sub-opercle; teeth strong; fins large, the caudal deeply 

 forked; color grayish, more or less spotted, varying much 

 with circumstances; D. 13 to 14; A. 12; V. 9; lat. 1. 

 220; -length 2 to 6 feet. All the Great Lakes, north to 

 the Arctic Sea; a fish of much firmer flesh than the next. 

 (/S. amethystus, Mitch.) 



7. S. siscowei, Agassiz. Siscowbt. L. Supeeioe 

 Teout. Stout; head smaller, 4 J in length; posterioi' 

 point of junction of opercle and sub-opercle nearer to 

 the lower anterior angle of sub-opercle than to the upper 

 end of gill opening; fins and teeth well developed but 

 weaker than in S. namaycushj ventrals farther back; 

 caudal less forked; fiesh fat and not firm; grayish, with 

 round white spots and markings; D. 12 to 14; A. 12; 

 lat. 1. 200. L. Superior, L. Huron. 



8. S. confmis, DeK. Lake Trout op New Yoek. 

 Blackish, with gray spots; body unusually short and 

 thick. Lakes of Central and Western N. Y.; a doubtful 

 species. 



9. S. symmetrica, Presoott. Winnipisbogbe Teout, 

 Grayish and brown above, marbled with darker; white 

 below; body unusually slender and symmetrical. Lake 

 Winnipiseogee; also a doubtful species. 



2. OSMERUS, Linnaeus. Smelts. 



1. 0. mordax, (Mitch.) Gill. Common Smelt. Head 

 4 in length; eye 4 to 4^ in head; teeth stout, especially 

 large on the tongue; transparent greenish, a silvery band 

 along sides; scales very loose; D. 11; A. 15; lat. 1. 66. 



18J 



