810 AI,CIN/K. 



2. Uria Troile. Foolish Guillemot. Jiill rather stout, 

 slif^litly (U'curvcd tOAvard the end, black, the angle of the 

 lower mandible slightly prominent, its sides convex ; tail of 

 twelve feathers. 



o. TJria lacrymans. Bridled Guillemot. Bill rather 

 slender, straight, black, the angle of the lower mandible 

 slightly prominent ; tail of twelve feathers ; eye encircled by 

 a white line, which extends backwards and downwards to 

 the length of an inch and a half. 



4. Uria Grylle. Black Guillemot. Bill black; feet coral- 

 red. In summer the plumage black, excepting a patch on 

 the wing ; the lower wing-coverts and axillars, which arc 

 white. In winter the prevailing colour white, variegated 

 with black. 



GENUS II. MEKGULUS. ROTCHE. 



Bill very short, stout, a little decurved, as broad as high 

 at the base, moderately compressed toward the end ; nostrils 

 basal, oblong, with a horny operculum ; tarsus very short, 

 compressed, Avith anterior oblique scutella ; toes of moderate 

 length, the inner much shorter than the outer, Avliich is about 

 equal to the middle toe ; claAvs modeiate, arcuate, compressed, 

 acute ; Avings small, narroAv, acute ; tail very short, slightly 

 roimded, of tAvelve feathers. 



1. Mergulus Alle. Little Rotche. Black above, Avhite 

 beneath. In summer the throat and fore-neck brownish- 

 black. 



GENUS III. UTAMANIA. RAZOR-BILL. 



Bill shorter than the head, very high, much compressed, 

 Avith the outline of the upper mandible arcuato-decur\'ate, 

 the sides nearly flat and erect, Avith several transverse curved 

 grooves, the edges inflected and sharji ; tarsus short, stout, 

 compressed ; toes of moderate length, the outer slightly 

 shorter than the middle toe ; claAvs rather small, arched, 

 compressed, acute ; Avings rather short, very narroAV, pointed ; 

 tail short, narroAv, cuncate, of tAvclve feathers. 



