_Generic Distinctions._--In this class the head is rather larger, neck rather shorter and thicker, than in the preceding genus (Anas), plumage more dense, feet stronger, and the hind toe with a broad appendage, which is the principal distinction. CANVAS-BACK. _Fuligula Valisneria_, Wils. _Specific Character._--Bill black, the length about three inches, and very high at the base; fore part of the head and the throat dusky; irides deep red; breast brownish-black. Adult male with the forehead, loral space, throat, and upper part of the head dusky; sides of the head, neck all round for nearly the entire length, reddish-chestnut; lower neck, fore part of the breast and back black; rest of the back white, closely marked with undulating lines of black; rump and upper tail-coverts blackish; wing-coverts grey, speckled with blackish; primaries and secondaries light slate color; tail short, the feathers pointed; lower part of the breast and abdomen white; flanks same color, finely pencilled with dusky; lower tail-coverts blackish-brown, intermixed with white; length twenty-two inches, wing nine and a quarter. Female, upper parts greyish-brown; neck, sides, and abdomen the same; upper part of the breast brown; belly white, pencilled with blackish; rather smaller than the male, with the crown blackish-brown. This is without question the finest duck that flies, as it is the largest and gamest; it is abundant late in the season, but wary. RED-HEAD. _Fuligula Ferina_, Wils. _Specific Character._--Bill bluish, towards the end black, and about two inches and a quarter long; irides yellowish-red. Adult male with head, which is rather large, and the upper part of the neck all round, dark reddish chestnut, brightest on the hind neck; lower part of the neck, extending on the back and upper part of the breast, black; abdomen white, darker towards the vent, where it is barred with undulating lines of dusky; flanks grey, closely barred with black; scapulars the same; primaries brownish-grey; secondaries lighter; back greyish-brown, barred with fine lines of white; rump and upper tail coverts blackish-brown; tail feathers greyish-brown, lighter at the base; lower tail-coverts brownish-black, rather lighter than the upper; length twenty inches; wing nine and a half. Female about two inches smaller, with the head, neck, breast, and general color of the upper parts brown; darker on the upper part of the head, lighter on the back; bill, legs, and feet, similar to those of the male. This duck, as it is scarcely distinguishable from the canvas-back, and has mainly the same habits, is but little inferior to that incomparable bird. BROAD-BILL. Blue Bill, Scaup, Black Head, Raft Duck. _Fuligula Marila_, Linn.