EXPLANATION OF FIGURES ON PLATE I. 



1. Puffin, Mormon arctica; liead of adult male in suininer plumage, from Bird 

 Rock, Gulf of St. Lawrence. 



2. Razor-billed Auk, Aloa tokua; head of adult male in sunnner plumage, from 

 Bird Rock, Gulf of St. Lawrence. 



3. Little Auk, Mergulus alle; head of young male in autumnal plumage, from 

 the coast of Massachusetts. 



4. Horned Grebe, Podiceps cornutu.s; head of adult male in spring plumage, from 



Pennsylvania. 



5. Red-throated Diver, Coly.mbus .sErTENTRioxALis; head uf joung in autumnal 

 jjlumage, from tlie coast of Massachusetts. 



BIRDS OF EASTERN NORTH AMERICA, 



