PILD DUCK. 595 
male is as follows: Length, twenty inches ; extent, twenty-nine inches; 
the base of the bill, and edges of both mandibles for two thirds of 
their length, are of a pale orange color; the rest, black; towards the 
extremity, it widens a little in the manner of the Shovellers, the sides 
there having the singularity of being only a soft, loose, pendulous skin ; 
wides, dark hazel; head, ‘and half of the neck, white, marked along 
the crown to the hind head with a stripe of black; the plumage of the 
cheeks is of a peculiar bristly nature at the points, and round the neck 
passes a collar of black, which spreads over the back, rump, and tail- 
coverts ; below this collar, the upper part of the breast is white, ex- 
tending itself over the whole scapulars, wing-coverts, and secondaries ; 
the primaries, lower part of the breast, whole belly, and vent, are 
black; tail, pointed, and of a blackish hoary color ; the fore part of the 
legs and ridges of the toes, pale whitish ash ; hind part, the same, be- 
spattered with blackish; webs, black; the edgés of both mandibles 
are largely pectinated. In young birds, the whole of the white plu- 
mage is generally strongly tinged with a yellowish cream color ; in old 
males, these parts are pure white, with the exception sometimes of the 
bristly, pointed plumage of the cheeks, which retains its cream tint the 
longest, and, with the skinny part of the bill, form two strong pecu- 
liarities of this species. 
The female measures nineteen inches in length, and twenty-seven 
in extent; bill, exactly as in the male; sides of the front, white; head, 
chin, and neck, ashy gray ; upper parts of the back and wings, brown- 
ish slate ; secondaries only, white ; tertials, hoary ; the white seconda- 
ries form a spot on the wing, bounded by the black primaries, and four 
hoary tertials edged with black; whole lower parts, a dull ash, skirted 
with brownish white, or clay color; legs and feet, as in the male; the 
bill in both is marked from the nostrils backwards by a singular, heart- 
shaped outline. 
' The windpipe of the male measures ten inches in length, and has 
four enlargements, viz., one immediately below the mouth, and another 
at the interval of an inch; it then bends largely down to the breast- 
bone, to which it adheres by two strong muscles, and has at-that place 
a third expansion. It then becomes flattened, and, before it separates 
into the lungs, has a fourth enlargement, much greater than any of the 
former, which is bony, and round, puffing out from the left side. The 
intestines measured six feet; the stomach co:ttained small clams, and 
some glutinous matter; the liver was remarkably large. 
