24 ANATID^. 



d'". Hind toe moderate ;tail-feather3 

 rather short; upper parts not 

 glossy ; no metallic •wing-specu- 

 lum ; bill rather thick and high 

 at base. 

 d^. Cere of the bill much de- 

 veloped 4. CEREOPSIN^, p. 79. 



e\ No cere on the bill 5. ANSERINAi, p. 81. 



b. Hind toe very narrowly lobed ; usually 



with metallic colours or speculum on 



the wings; the larynx with a bulla 



ossea in males. [p. 128. 



c'. Bill rather short and goose-like 6. CHENONETTINAi, 



d'. Bill rather flat and broad 7. ANATIN^, p. 142. 



c. Hind toe broadly lobed. 



e'. Bill more or less depressed. 



e . Tail-feathers normal, not particu- [p. 326. 



larly stiff 8. FULIGULINA, 



f". Tail-feathers narrow and very 



stiff 9. ERISMATURINM, 



f . Bill more or less compressed, never [p. 426. 



decidedly depressed. 

 g''. Tail rather long and stiff ; no tooth- 

 like serrations on the edges of the [p. 454. 



mandibles 10. MERGANETTIN^, 



h". Tail moderately long, not particu- 

 larly stiff; lower mandible without 

 trace of lamellae along the sides, 

 but with a series of distinct tooth- 

 like serrations along the upper 

 edsre, as on the edges of the upper 

 mandible 11. MERGINM, p. 463. 



Subfamily I. CYGNINiE. 



Key to the Genera. 



. Lores in the adult birds naked. 

 a'. Tertials and scapulars normally smooth ; 



predominant colour white 1. Cygnus, p. 25. 



v. Tertials and scapulars crisp ; predominant 



colour black 2. Chenopis, p. 41. 



Lores feathered 3. Coscoroba, p. 42. 



