346 



ALCIDiE, AUKS. GEN. 328. 



to dark green ; sometimes ijerfectly plain, usually fantastically streaked or 

 blotched in interminably varying pattern. Sw. and Rich., F. B.-A. ii, 

 477 ; NuTT., ii, 526 ; Aud., vii, 267, pi. 473 ; Uria lomvia and ringvia Cass. 

 in Bd., 913, 914; Lomvia troile and L. ringvia CouES, /. c. 75, 78. 

 Pacilic specimens have a somewhat diflerently shaped bill, constituting var. 



californica Bryant, Proc. Best. Soc. N. 

 H. 1861, p. 11 ; CouES, I. c. 79. troile. 

 Tldch-hilled, or Briinnich's Ouillemot. 

 Depth of bill at nostrils about J the 

 length of culmen ; tomia of upjDer man- 

 dible at base dilated, denuded, usually 

 yellowish. Distribution as in the last 

 Fig. 237. Thick-bjiiea Guillemot. " specics. Uria hrilnicliii Sw. and Rich., 

 F. B.-A. ii, 477 ; Nutt., ii, 529 ; Aud., vii, 265, pi. 472 ; U. arra Cass, in 

 Bd., 914; Lomvia svarhug Coues, I. c. 80 area. 



Fig. 238. Murres. 



