The winter plumage differs considerably; the bill, iris, and feet, are as above. The upper parts are brownish-grey, the head narrowly streaked with dusky; the rump as in summer; the scapulars plainly margined with whitish; the quills as in summer. The band over the eye lighter, the loral space grey; the fore part and sides of the neck greyish-white, longitudinally streaked with grey, the sides similar, and with the lower tail-coverts barred with grey, the rest of the lower parts white. Length to end of tail in a male 9 inches; extent of wings 16-1/2; wing from flexure 5-1/4; tail 2-4/12; bill along the ridge 1-6/12, along the edge of lower mandible 1-7/12; bare part of tibia 1; tarsus 1-7/12; hind toe and claw (4-1/2)/12; middle toe (9-1/12)/12, its claw (2-1/2)/12. The roof of the mouth is flat, with three rows of papillæ. The tongue is 1 inch 5 twelfths long, emarginate and papillate at the base, very slender, concave above, tapering to a point. The œsophagus is 4 inches long, very narrow, its diameter 2 twelfths. The proventriculus is oblong, 7 twelfths in length, 3-1/2 twelfths in diameter. The stomach is a strong gizzard of a roundish form, compressed, 8 twelfths long, 7-1/12 twelfths broad; its lateral muscles large, its epithelium very dense, thick, longitudinally rugous, and of a reddish-brown colour. The intestine is 12-1/2 inches long, its anterior part 2-3/4 twelfths in diameter, the hind part 1-1/2 twelfth. The rectum is 1-1/2 inch long; the cœca 11 twelfths long, 1 twelfth in diameter, obtuse. The trachea is 3 inches long, slender, its diameter at the upper part 1-3/4 twelfths, gradually diminishing to the lower part, where it is 1 twelfth. The rings, about 110 in number, are slender and unossified, the two last divided. The bronchi have about 15 half rings. The contractor muscles are thin, the sterno-tracheal slender; and there is a pair of inferior laryngeal muscles going to the first bronchial rings. In another individual, the intestine was 13-1/4 inches long, the rectum 1-1/2 inch, the cœca 1 inch. The contents of the gizzard in both were fragments of shells, small black seeds, and much sand and gravel. AMERICAN WIDGEON. _ANAS AMERICANA_, GMEL. PLATE CCCXLV. MALE AND FEMALE.