BIRDS. 



ORDER 

 GALLINACE^. 



TETRxlO. GROUS. 



Generic Character, 



Rostrum breve, crassiuscu- 

 lum, suprafornicatum, con- 

 vexum, versus apicem in- 

 curvum. 



Naves basales^ squama for- 

 nicali superne semiclausae, 

 plumulis obtectae. 



Supercilia nuda, verrucosa, 

 coccinca. 



Pedes tetradactyli, mutici, di- 

 gitis tribus anticis, uno 

 postico : tarsi hirsuti. 



Alee breves, rotundatae. 



Tetrao. Auctorum^ 



Beak short and thick^ arched 

 above, and convex; bent 

 down towards the tip. 



Nostrils basal, half closed 

 with an arched scale above, 

 and clothed with small 

 feathers. 



Eyebrows naked, warty, and 

 of a scarlet colour. 



Feet four-toed, smooth, with 

 three toes before and one 

 behind : tarsi feathered. 



Wings short, rounded. 



X HE Grous form a peculiar genus, whose dis- 

 tinguishing characters consist in having a naked 

 V. XI. p. II. 18 



