Bill greyish-black, iris dark brown; feet flesh-coloured, claws dusky. Head and neck greyish-white; a small black patch about an inch behind the eye on each side. Upper parts dull bluish-grey, many of the wing-coverts greyish brown, edged with paler; quills as in the adult; rump and tail white, the latter with a broad band of black at the end, the tips narrowly edged with whitish. Length to end of tail 13-3/8, to end of wings 15-5/8, to end of claws 13; extent of wings 32-1/2 inches. Weight 6 oz. The white spots on the tips of the wings vary greatly in size, and are frequently obliterated when the feathers become worn. Palate with five series of small distant papillæ. Tongue 1 inch 1-1/2 twelfths long, slender, tapering to a slit point, emarginate and papillate at the base, horny towards the end. Aperture of posterior nares linear, 9 twelfths long. Heart 1 inch long, 9 twelfths broad. Right lobe of liver 1 inch 11 twelfths long, the other lobe 1 inch 7 twelfths. The œsophagus is 6-1/2 inches long, very wide with rather thin parietes, its average diameter when dilated 10 twelfths, within the thorax enlarged to 1 inch 2 twelfths. The transverse muscular fibres are distinct, the internal longitudinal less so; the mucous coat longitudinally plicate. The proventriculus is 1/2 inch long, with very numerous small glandules. The stomach is a small oblong gizzard, 10 twelfths long, 8 twelfths broad; its lateral muscles rather large, as are its tendons. The inner coat or epithelium is of moderate thickness, dense, with nine longitudinal broad rugæ, and of a brownish-red colour. The intestine is 24-1/2 inches long, its diameter 2 twelfths. The rectum is 1-1/2 inch long. The cœca are 2 twelfths long, 1 twelfth in diameter, cylindrical and obtuse. The intestine of another individual, a male, is 20-1/2 inches long, 3 twelfths in diameter. The trachea is 3 inches 10 twelfths long, its diameter at the top 3 twelfths, at the lower part 2-1/4 twelfths, the rings very feeble, unossified, about 130 in number. The sterno-tracheal muscles are very slender, as are the contractors; and there is a pair of inferior laryngeals. The bronchi are of moderate length, with about 18 half rings. BUFFEL-HEADED DUCK. _FULIGULA ALBEOLA_, BONAP. PLATE CCCXXV. MALE AND FEMALE.