242 



URIA. GUILLEMOT. 



Generic Character. 



T3eak clothed at its base with 

 downy feathers, straight, 

 elongated, above convex, 

 compressed on each side, 

 subulated, acute; the upper 

 mandible towards the tip 

 laterally emarginated. 



Nostrils linear, half-covered 



with feathers. 

 Legs three-toed, palmated. 



Rostrum basi plumis tomen- 

 tosis obductum, rectum, 

 elongatum, supra con- 

 vexum, utrinque compres- 

 sum, subulatum, acutum ; 

 mandibula. superiore ver- 

 sus apicem lateratim emar- 

 ginata. 



Nares lineares, plumis semi- 

 tectae. 



Pedes tridactyli, palmati. 



URIA. Briss., Lath., Brunn. 

 COLYMBUS. Linn., Gmel. 

 LOMVIA. Ray. 

 GRYLLE. Leach. 



J. HE Guillemots have a beak greatly resembling 

 that of the Diver ; but this genus is well separated 

 from them by the absence of the hinder toe ; and 

 also by the habits of the individuals comprised in it ; 

 the Divers usually frequenting the fresh waters, while 

 these prefer the sea or its coasts ; and very seldom 



