BIRDS. 



ORDER 



NATATORES. 

 FAM. COLYMBID^S. 



PODICEPS. GREBE. 



Generic Character. 



Rostrum capite longius aut 

 longior, robustum, paulo 

 compressum, aut fere cy- 

 lyndricum, subulatum, rec- 

 tum, integrum, acutum ; 

 mandibula superiore recta, 

 aut apice adunco. 



Nares laterales, concavae, ob- 

 longa?, membrana semi- 

 clausae. 



Tibice seminudse. 



Pedes tetradactyli ; digiti 

 antici depressi lateribus 

 lobo simplici instructi, 

 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. 



ShanJcs half-naked. 



Legs four-toed ; the anterior 

 toes depressed, with their 

 sides furnished with a 

 simple lobe connected at 

 the base; the hinder toe 

 internally articulated to the 

 tarsus. 



Tail wanting. 



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

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



V. Xlir. p. i. 



