% 



I 



BIRDS. 



ORDER 



NATATORES. 

 FAM. COLYMBIDJZ. 



rODICEPS. GREBE. 

 Generic Character, 



Rosb'um capite lorigius aut 

 longior, robustum, paulo 

 compressum, aut fere cy- 

 lyndricum, subulatum, rec- 

 tum, integrum, acutum ; 

 mandibula superiore recta 

 aut apice adunco. 



Nares laterales, concavae, ob- 

 longae, membrana semi- 

 clausse. 



Tibioe seminudse. 



Pedes tetradactyli ; digiti 

 antici depressi lateribus 

 lobo simplici instruct!, 

 basique connexi ; pollex 

 tarso interne articulatus. 



Cauda nulla. 



Beak the length of the head or 

 longer, robust, a little com- 

 - pressed, or nearly cylin- 

 drical, subulated, straight, 

 entire, pointed ; the upper 

 mandible straight, or 

 hooked at the tip. 



Nostrils lateral, concave, ob- 

 long, half closed by a mem- 

 brane. 



Shanks half-naked. 



Legs four-toed ; the antei'ior 

 toes depressed, with their 

 sides furnished with a 

 simple lobe connected at 

 the base; the hinder toe 

 internally articulated to tlie 

 tarsus. 



Tail wanting. 



PODICEPS. Ray, Lath., Cuv., Vieill., Temm. 

 COLYMBUS. Linn., Gmel., Briss., Ray, &c. 



V. XIII. P. I. 



