270 
THE PINTAIL DUCK. 
brownish-black and light yellowish-brown, the margin of the feathers, and a 
mark on each side of the shaft being of the latter colour ; the speculum is 
dusky-green, margined behind with white; the primary quills greyish-brown. 
The lower parts are of a light brownish-yellow, the sides variegated with 
brown ; the bill is black, the iris brown, the feet light bluish-grey. 
Length 22J inches, extent of wings 34. Weight 1 lb. 9 oz. 
Male. Width of mouth 8 twelfths ; its roof very deeply concave, with a 
medium prominent line, on which are 8 papillae ; the lamellae on the upper 
mandible 50, and- not reaching the margin ; those on the upper edge of the 
lower mandible about 116. Tongue 2 inches 1 twelfth long, fleshy, promi- 
nent at the base, with a narrow median groove, thinner and broadly chan- 
nelled toward the end, the edge thin and bristled, with 6 large papillas toward 
the base, on each side, the tip somewhat semicircular, very thin, and horny. 
(Esophagus 11 inches long, 4 twelfths in width, at the lower part of the 
neck dilated to 8 twelfths, then contracting to 4 twelfths ; the proventriculus 
8 twelfths in breadth. The stomach a very muscular oblique gizzard, 1 inch 
11 twelfths in breadth, 1 inch 4 twelfths long, the right muscle 9 twelfths, 
the left 11 twelfths thick ; the epithelium with two very thick concave 
grinding plates. Intestine 4 feet long, its average width 4 twelfths; coeca 4 
inches 9 twelfths long, their greatest width 2 twelfths, narrow at the com- 
mencement and toward the end, 3 inches from the extremity. Liver with 
the right lobe 2 inches 8 twelfths long. The left 2 inches; gall-bladder 1 
inch long, 5i twelfths broad. 
Trachea 82 inches long, narrow at the commencement, its breadth being 
2£ twelfths, gradually enlarging to 4J twelfths ; then contracting to 3 
twelfths, and terminating in a transversely oblong bony dilatation, project- 
ing on the left side, with a rounded bulge similar to that of the Dusky Duck 
and Teal. The rings are firm, 140, besides about 8 which are blended with 
the tympanum. Bronchial half rings 22 and 26. Muscles as usual. 
