FAMILY ANATID^E. DUCKS, GEESE, AND SWANS. 79 



Top of head, black, divided on crown; more or less green on head; throat, white; 

 axillary white; culinen, divided and pointed at base (male). (See cut of bill.) 



Somateria borealis. Greenland Eider Duck. 



See No. 115. 



Top of head, slate color; cheeks, greenish; throat, white, with large, black, V-shaped 

 mark (male). Somateria spectabilis. King Eider Duck. 



See No. 117. 



Section 2. Hind toe, with well defined membraneous lobe 

 or flap ; no white on head ; belly, black. 



General plumage, black ; axillars, black; no white on wing; 

 bill, orange at base ; feathers on bill, more than one half inch 

 from nostril (male) . 



Oidemia americana. American Scoter. 

 Black Coot. 

 Butter-bill Coot. 

 See No. 118. 



Section 3. Hind toe, with well defined membraneous lobe 

 or flap; head, marked with more or less white, or 

 grayish white; belly, mottled brown, or grayish brown, 

 or slaty. 



General plumage, brownish ; no white on wing ; feathers 

 on bill, more than one half inch from nostril (female and im- 

 mature). 



Oidemia americana. American Scoter. 

 Butter=bill Coot. 



See No. 118. 



Oidemia americana. 



General plumage, grayisti brown ; speculum, white ; feathers on bill, less than one 

 half inch from nostril (female and immature). 



Oidemia deglandi. White-winged Scoter. White-winged Coot. 



See No. 120. 



General plumage, grayish brown ; feathers extending on upper part of bill more than on 

 the sides ; no white on wing ; feathers on bill, less than one half inch from nostril (female). 



Oidemia per spicillata. Surf Scoter. Skunk-head Coot. 



See No. 121, 



