32 



KEY TO THE BIRDS OF EASTERN NORTH AINIERICA. 



* Group 5. Wing, over 8.50 inches long. 



Auk. 



Head and neck, black, easily distinguished 

 by the shape of the bill; a white line on bill. 

 Aim tarda. Razor^billed Auk. 

 See ]N'o. 15. 



Murre. 



Head and neck, sooty brown ; hill pointed, no white line on bill. Una troile. Murre. 



See No. 13. 



* For directions for measurement, see page 0. 



