PALMIPEDES. 427 
the Common Duck. Its capsule is very large, circular, verti- 
cally flattened, and all on the left side. 
Some of them have pointed tails. 
“An. acuta, L.; Le Pilet, Enl. 9543 Wils. VIII, lxviii, 3 33 Frisch, 
160 and 168; Naum. 51, f. 74 and 75. (The Pintail.) Ash ada 
ed above and on the flanks, finely striped with black; white be- 
neath; the head tawny, &c. The capsule of the trachea is small. 
The males of others have some of the feathers of the tail recurved. 
An. boschas, L.(1) Enl. 776, 7773 Wils. VIL, be 7 Frisch, 
158 and 159 (The Mallard), is known by its pale yellow feet, 
yellow bill, the beautiful changeable green of the head, and 
rump of the male, &c. In our poultry-yards it varies in colour, 
like all other domestic animals. The wild breed is common in 
the marshes; it builds among the reeds, in the hollow trunks of 
willows, and sometimes upon trees. Its trachea terminates be- 
low, in a large osseous capsule. 
A singular variety is found in the Hook-billed Buck the 4n. 
adunca, L. 
Some of them have a crested head, and a bill somewhat more 
narrow at the end, which, though foreign, are reared in all the avia- 
ries of Europe. Such are, 
_ dln. sponsa, L.; Enl. 980 and 981; Wils. VIII, Ixxviii, 3 (The 
Summer Duck): and An. galericulata, L., Enl. 805 and 806; 
_Vieill. Gal. 287 (The Chinese Duck). Some of the wing-fea- 
thers in the male of this latter species are widened and turned 
up vertically, in addition to those of the tail. Their capsules 
are rounded, and of a moderate size. 
There are other species which to the bill of a Duck add legs, even 
longer than those of a Goose; they build and perch on trees.(2) 
Some of this number have but semi-palmated feet.(3) Finally among 
those which have no peculiar mark is the 
An. strepera, L.; Le Chipeau; Enl. 958; Naum. I, c. 45, f. 65; 
Wils. VIII, Ixxi, 1. (The Gadwal.) Reticulated and finely 
striped with black; wings, red with a green spot and a white 
one. The capsule of the trachea is small. 
An. Penelope, L.; Le Siffleur; Enl. 825; Frisch, 164 and 169; 
Naum. f. 72 and 73.(4) (The Whistler.) Finely striped with 
(1) Borxas, Greek name of the Mallard. 
(2) An. arborea, Enl. 804;—autumnalis, 826;—viduata, 808. [The Anas sponsa 
and the 4. moschata likewise build on trees. Am. Ed.) . 
(3) An. semipalmata, Lath.; Cuv. Mém. du Mus. 
(4) Penelope, the Greek name of a red headed Duck, either the present spe- 
cies or the ferina, L. 
