RISE AND PROGRESS OF ZOOLOGY. Ixiil 



Recurvirostra, Scolopax, Tringa, Fulica, Parra, 

 Rallus, Vaginalis, Psophia, Cancroma, Scopus, 

 Glareola, Hematopus, Charadrius, Otis, Struthio. 



Order V. — Gallints. Beak convex; upper 

 mandible vaulted over the inferior; nostrils 

 half covered with a convex cartilaginous mem- 

 brane ; feet divided, but connected at the inmost 

 joint ; eight genera : Didus, Pavo, Meleagris* 

 Penelope, Crax, Phasianus, Numida, Tetrao. 



Order VI. — Passeres. Thick beaks, conical, 

 sharp ; nostrils, oval, wide, and naked ; seventeen 

 genera: Loxia, Colius, Fringilla, Phytotoma, 

 Emberiza, Caprimulgus, Hirundo, Pipra, Tur- 

 dus, Ampelis, Tanagra, Muscicapa, Parus, Mota- 

 cilla, Alauda, Sturnus, Columba. 



The generic characters are taken from pe- 

 culiarities in the bill, the nostrils, the tongue, 

 the feet, the feathers, the face, figure of the 

 body, $*c. 



The specific characters in this class are drawn 

 from a great many particulars. In several (as 

 in Falco) the colour of the cera, or naked tunic 

 that surrounds the basis of the beak, and the 

 colour of the legs, are taken as distinguishing 

 species. As, however, the colour of birds is 

 liable to considerable variation from climate or 

 season, Linnseus does not trust to this alone, 



