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 22\ inches, extent of wings 34. Weight 1 lb. 9 oz. 



Male. Width of mouth S twelfths; its roof very deeply concave, with a 

 median prominent line, on which are 8 papilla?; 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, tbe edge thin and bristled, with 6 large papilla? 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 S 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 S twelfths long. The left 2 inches; gall-bladder 1 

 inch long, 5\ twelfths broad. 



Trachea Sj inches long, narrow at the commencement, its breadth being 

 2\ twelfths, gradually enlarging to 4^ 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 S which are blended with 

 the tympanum. Bronchial half rings 22 and 26. Muscles as usual. 



