612 CLASS AVES. 



green ; middle of back, whole of belly and vent, black. 

 Greenland. The Grey-headed Duck^ Edw. Lewin, 

 Br. Birds, t. 24, 5. 



In the first, the branches of the bill are narrow and 

 linear ; in the latter, broad and circular. 



See Platypus Leisleri, Brehm., from Coast of Green- 

 land, and P. Borealis, Brehm. 



The MiLLouiNS. Fuligula, Leach. 



Have no other remarkable character than that of a 

 large and flat bill. There are many species in 

 France, in all of which it appears that the trachea 

 terminates by a similar enlargement, forming a cap- 

 sule, partly membranous, on the left side, supported 

 by a frame, and bony ramifications. 



The genus Nyroca, Flem., and Aythia, Boie. 



Pochard Duck. An. Ferina, L., An. Hufa, Gm. 

 Enl. 803. Naum. 1, c. 58, f. 87, 88. Wilson 

 Am. viij. 90, 6. 



Ashy, narrowly striated with black ; the head, and 

 top of the neck, red -, the bottom of the neck, and 

 back, brown ; the bill clear lead-colour. Builds 

 sometimes in the reeds of our ponds. Its trachea is 

 nearly of equal diameter. 



Jted-crested Duck. An. Rujinciy L. Enl. 928. 

 Naum. 1. 3, 32, f ^S, 64. 



Black, with a brown back, and white on the flanks 



