608 CLASS AVES. 



large, furnished at its base with a protuberance. They 

 live in great flocks along our coasts, principally on 

 shell fish. The young female is An. Cineraceus, 

 Naum. 1, c. 60, f 91, 92. Fuligula Nigra, Bonap. 



Velvet Duck. Anas Ficsca, Lin. Enl. 956. Frisch. 

 165. Naum. 1. c. Sup. f. 15 and 16. Wilson 



72, 3. 



Differs from the last by being altogether stouter ; 

 by a white spot on the wings, and a white stripe 

 under the eye. The trachea has in its middle a cir- 

 cular enlargement, flattened vertically. 



Black Duck. Anas Perspicillata, Lin. Enl. 995. 

 Edw. 155. Wilson, Am. viij. 67, 1. 



Has white on the occiput, and on the hind neck ; 

 and the naked yellow skin at the base of the bill also 

 surrounds the eyes. 



The last forms the genus Macroramphus, Lesson, 

 not Leach. 



Ural Duck. An. Mersa, and Leucoptera. French 

 Translation of Pallas, Travels, pi. v. and vj. Naum. 

 Sup. 40, f. 79, 80. 



Head, and part of neck, white, with black patch on 

 crown ; forepart of body, yellow-brown, undulated 

 black ; beneath, greyish-brown, glossy ; bill blue, the 

 end marked with diverging striae, Ural Mountain. 



(Edemia Leiicocephala . Steph. Fuligula Oxyura 

 Leucocephala, Ch. Bonaparte. 



