EGGS OF NORTH AMERICAN BIRDS. 5 



30. MuRRE, Uria troile. (Type, Plate I.) Eggs, 1, de- 

 cidedly pyriform, varying from pure white, through blue to 

 green, spotted, blotched, and lined with black, brown, and 

 umber; placed on rocky shelves of cliffs; 1.75 -|- 2.90 to 2.15 

 -j- 3.50. Breeds on the coasts and islands of Atlantic, from 

 Gulf of St. Lawrence northward, in June. 



30a. California Murre, Uria troile calif ornica. Eggs, in- 

 distinguishable from those of No. 30. Breeds on coasts and 

 islands of North Pacific, from California to Prybilof Islands. 



306. Ringed Murre, Uria troile ringma. Eggs, indistin- 

 guishable from those of No. 30, and breeding range the same. 



31. Brunnich's Murre, Uria lomvia. Eggs, indistin- 

 guishable from those of No. 30, and breeding range the same, 

 excepting that it occurs in the Eastern Arctic Ocean. 



31a. Pallas's Murre, Uria lomvia arra. Eggs, indis- 

 tinguishable from those of No. 30. Breeds on coasts and 

 islands of the North Pacific and Western Arctic Oceans. 



32. Razor-billed Auk, Alca tarda. Eggs, usually 1 or 2, 

 oval, white or bluish, spotted and blotched with very dark 

 brown and umber; 2.10 -f-3.10 to 2.15 -f- 3.15 ; placed in holes 

 of cliffs. Breeds from coast of Maine, northward, in June. 



33. Great Auk, Plautus impennis. Eggs, 1, rather pyri- 

 form, varying from white to bluish, spotted and blotched with 

 white, brown and black. Formerly found breeding from New- 

 foundland, northward, now supposed to be extinct. 



34. DovEKiE, Alle alle. (Type, Plate III.) Eggs, 1, bluish 

 white ; 1.25 + 1-80 to 1.30 -f 1-85 ; placed on shelves of cliffs. 

 Breeds in Greenland, and on the coasts and islands of high 

 northern latitudes in Atlantic and Eastern Arctic Oceans, in 

 June. 



