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UHIA BRUNNICIIII. ERUNNICH'S GUILLEMOT. 



THICK-BILLED GUILLEMOT. LARGE-BILLED GUILLEMOT. 



Uria I!niniii(.'liii. Sabine. Traus. Liun. Soc. XII. 



TJria Brunnichii. Flem. Brit. Anim. 134. 



Guillemot a gros bee. Uria Brunnichii. Temm. Man. d'Oruith. II. 224. 



Uria Brunnichii. Bonap. Comp. List, 65. 



BUI stout, considerahly decurced at the end, black, u-ith 

 the basal margins of the upper mandible whitish, the angle of 

 the loioer prominent, and its sides concave; p)lumuge decj) 

 black above ; sides of the head and fore part of upper neck 

 tinged with broivn ; lower 2^'-i'>'ts and tips of secondaries 

 white; sides streaked with black ; tail of fourteen feathers ; 

 interdigital membranes fidl. In summer, the ichole head and 

 throat blackish-brown. In winter, the sides of the head 

 behind the eyes and the throat xohite. 



Male in Summer. — Brunnich's Guillemot, -vvhicli may 

 readily be distinguished from tlie other species by its shorter, 

 deeper, and thicker bill, has the body stout and rather 

 depressed ; the neck short and thick ; the head large, broadly 

 oblong, narrowed before. The bill is much shorter than the 

 head, stout, compressed, tapering, pointed ; upper mandible 

 with the dorsal line arcuato-decurvate, the ridge rather broad 

 and rounded at the base, gradually narrowed, the sides 

 sloping, the edges inflexed for half their length, sharp and 

 direct toward the end, with a distinct notch close to the tip ; 

 lower mandible with a prominent angle, beyond which to 

 the acute tip the dorsal line is very considerably incurvate, 

 the sides somewhat concave ; gape-line extending to beneath 

 the eyes. 



Nostrils linear, at the lower anterior edge of tlie nasal 



