Bill greenish-black, eye of a darker brown. Feet dull yellowish-green; claws dusky. The upper parts are deep ash-grey, each feather margined with whitish; feathers of the rump greyish-white, upper tail-coverts white, barred with dusky. The quills and tail feathers as in summer. A band from the bill over the eye to the hind part of head, white; loral space, cheeks, and sides of neck pale grey, streaked with darker; throat and lower parts in general, white; the sides, axillar feathers, and under wing-coverts, barred or spotted with dusky; lower tail-coverts as in summer. The young in autumn are of a dull light brownish-grey colour above, each feather having a narrow whitish margin, within which is a dusky line. The fore part and sides of the neck, and the fore part of the breast dull greyish-white, with small dusky-grey longitudinal streaks; the band over the eye indistinct, the loral space darker. The bill and feet are of a duller tint, and the eye darker, than in the adult in winter. Weight 4-1/4 oz. On the roof of the mouth is a double series of small blunt papillæ. The tongue is very slender, 1-1/12 inch long, emarginate and papillate at the base, channelled above, horny beneath, the point rather acute. The œsophagus is 4-3/4 inches long, narrow, its diameter 3-1/2 twelfths. The proventriculus is oblong, 5-1/2 twelfths in diameter, 9 twelfths long. The stomach is an extremely powerful gizzard, of a roundish form, 1 inch and 5 twelfths long, its greatest breadth 1-1/4 inch; the cuticular lining thin, horny, with large longitudinal rugæ. The intestine 25 inches long, its average diameter 3-1/2 twelfths; cœca cylindrical, 3 twelfths long. The contents of the stomach are fragments of mussels and gravel, with which part of the intestine is also filled. The trachea is 3-1/4 inches long, flattened, 2-1/2 twelfths broad at the top, diminishing to 2 twelfths; its rings very slender and unossified, 98 in number; the bronchial half-rings about 15. The lateral muscles very thin, the sterno-tracheal slender. ANHINGA OR SNAKE-BIRD. _PLOTUS ANHINGA_, LINN. PLATE CCCXVI. MALE AND FEMALE.