180 NESTS AND EGGS OF NORTH AMERICAN BIRDS. 



76Sa. California Guillemot — lomvia troile californica. This bird 

 breeds from California north to the Prybilof Islands. Breeds in vast num- 

 ber on the Farallone Islands. .Its general habits, nesting, etc., are the 

 same as those of the Common Guillemot. 



Hab. Coasts and islands of the North Pacific, breeding from California north to the Prybilof Islands. 



764. Thick-billed Guillemot — lomvia arra. An abundant bird on 

 the coasts and islands of the North Pacific, swarming at their breeding 

 places on the rocky islands and shores in myriads. Its habits and nesting 

 are the same as those of the foregoing ; the eggs averaging larger. 



Hab. Coasts and islands of the North Pacific and Western Arctic Oceans. 



ERRATA. 



Page 73, thirteenth line from bottom read nests >uii difficul 

 Page 95, No. 405^, read Arctic for Western Horned owl. 

 Page 101, eleventh line from bottom read 1885 for 1855. 



