Mouth small J upper jaw not extending back to below center of eyej 

 teeth on jaws and tongue weak 



Whitefishes 

 Coregonidae 



p. 28 



Mouth large j upper jaw extending back at least to below center of 

 the eycj strong conical teeth on jaws and tongue 9 



9. Scales large, fewer than 15 along lateral line 



^^^ American Smelt 



^^"T^ -~~^ZrJ^\ Osmeridae 



Scales small, more than 105 along lateral line 



Salmon and Trout 

 r"^ J^^^ ■ — "ZzX^ ( Salmonidae 



^^:s^ p. 14 



10. Midline of belly provided with saw-like keel 



Ale wife 

 Lo \\ '\ / Clupeidae 



Midline of belly without a saw-like keel 11 



1 1 . Head scaly or partially scaly 12 



Head without scales 13 



8 



