26 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Bill, not narrow; tarsus, scutellate in front 

 (transverse scales); toes, four, the front ones, full 

 webbed; hind toes, without decided flap or lobe. 



Family ANATID^. Subfamily ANATIN^E. 

 River and Pond Ducks. 

 See pages 54, 58. 



Ducks. 



Bill of Duck. 



Bill, not narrow; tarsus, scutellate in front (trans- 

 verse scales ) ; toes, four, the front ones, full webbed ; 

 hind toe, with flap or lobe. 



Family ANATID^. Subfamily FULIGULIN^. 



Sea Ducks. 

 See pages 54, 62. 



Lores, feathered; tarsus, reticulate (scales rounded); wing, more 

 than thirteen inches long; toes, four, the front ones full webbed.' 



Family ANATID^. Subfamily ANSERINE. Geese and Brant. 



See pages 55, 71. 



Geese and Swan. 



Lores, partly bare; tarsus, recticulate (scales rounded); size, 

 large; neck, long; wing, over eighteen inches long; plumage, white 

 or gray. Family ANATID^. Subfamily CYGNIN^. Swans. 



See pages 55, 73. 



