360 AUDENOA. 



1. S. oquassa, (Grd.) G. & J. Rangeley Lake Trout. 



(See text.) 



aa. Body stout; head large, broad above, with large mouth, 

 the maxillary reaching past eye; caudal little forked ; 

 adipose fin very large; red spots large, on back as well 

 as on sides. 



2. S. speciabilis, (Grd.) G. & J. Pacific Red-Spotted 



Trout. Streams W. of Sierra Nevada. (S. camjyhelli 

 and aS'. parhii^ Suckley.) 



** Hyoid bone toothless; adipose fin small. 

 h. Head very large and pointed. 



3. 5. bairdii, (Suckl.) G. & J. " Dolly Varden 

 Trout." Streams W. of Sierra Nevada. 



W). Head large ; rather bluntish. 



4. S. fontina/is, (Mitch.) G. & J. Common Speckled 

 Trout. (See text.). D. 2, 11; A. 2, 9. Scales in 225' 

 rows. Georgia (Little Tennessee River) to Lake Supe- 

 rior, Hudson's Bay, and Newfoundland; entering the sea, 

 where it becomes the Canadian " Salmon Trout." [S. 

 hudsonicus Suckley, S. immaculatus Storer, S. cana- 

 densis Smith, S. hearnii Rich.) 



On page 274: 



Genus COREGONUS. 



I am indebted to Prof. James W. Milner of the U. S. 

 Fish Commission, for an opportunity to examine some of 

 the manuscript of his forthcoming review of the Core- 

 goni, and to study a very full series of the specimens on 

 which the review is based. For many of the conclusions 

 below given, 1 am indebted to Prof. Milner, but for the 

 generic and specific diagnoses and their arrangement 

 here, the present writer only is responsible. The species 

 referred in the text to Coregonus^ fall into four well- 

 marked groups, three of which at least may at present 



