83 



MERGULUS. SEA-DGVE. 



Generic Character. 



Rostrum mediocre, basi plu- 

 mis tomentosis instructum, 

 crassiusculum, supra con- 

 vexum, versus apicem 

 emarginatum, curvatum. 



Nares rotunda? plumis serai- 

 tectae. 



Pedes breves, tridactyli, pal- 

 mati. 



Alee breves. 



Beak medial, its base fur- 

 nished with downy fea- 

 thers, somewhat thickened, 

 above convex, emarginate 

 towards the tip, curved. 



Nostrils rounded, half co- 

 vered with feathers. 



Leg's short, three-toed, web- 

 bed. 



Wing's short. 



MERGULUS. Ray, Vieil., Leach. 



ALCA. Linn., Gmel., Lath. 



URIA. Briss., Brunn., Temra., Sabine. 



JL HERE is but one species known belonging to 

 this genus, which is readily distinguished from the 

 other Alcadas by its short, thick, and convex beak, 

 which is feathered from the corners of the mouth 

 half-way forwards towards the point* 



v. XIII. p. I. 



S 



