THE HARLEQUIN DUCK. 
89 
complete, but all tbe white markings on the neck are edged with black ; tho 
fore part of the breast is dull grey, the middle yellowish-grey, spotted with 
bluish-grey. The white bar on the wing is still wanting ; the rump is glossy 
bluish-black, the tail nearly of the same tint. 
Adult Female. 
The principal colour of the female is greyish-brown, deeper on the head 
and rump, lighter on the fore neck, and mottled with greyish-white on the 
breast. The quills are dark brown, edged with lighter, the tail blackish- 
grey. There is a large whitish spot mottled with grey before the eye, and 
another of a purer white behind the ear. Bill and feet dull bluish-grey. 
Iris brown. 
Length to end of tail 16 inches, to end of wings 131, to end of claws 15i ; 
extent of wings 24£ ; wings from flexure 8? ; tail Si ; bill along the back 
l}f, along the edge of lower mandible 1 J ; tarsus li ; middle toe 2, its 
claw T 4 2 . W eight li lbs. 
Male from Dr. T. M. Brewer. Width of mouth 9 twelfths, its roof 
deeply concave as in most other Ducks ; the posterior aperture of the nares 
oblongo-linear, 8 twelfths in length, margined with very slender acute 
papillse ; the lamellae on each side of the upper mandible about 35 ; those 
on the edge of the lower mandible about 60 ; the tongue 1 inch 4 twelfths 
long, fleshy, broad, thick at the base, becoming thin toward the end, with 
thin, fringed margins, and a semicircular tip. (Esophagus Y inches 2 
twelfths long, of the uniform width of 8 twelfths on the neck, the proven- 
triculus 9 twelfths in breadth. Stomach a strong muscular gizzard, li 
•inches long, 1 inch 7 twelfths broad ; the lateral muscles very large, the 
tendons covering almost its whole surface ; the epithelium very thick, dense^ 
with two opposite elliptical flat grinding surfaces. The proventricular 
glands form a belt 1J inches in breadth. The liver is very large, its lobes 
very unequal, the right 2 inches 8 twelfths long, the left 1 inch 8 twelfths. 
Intestine 58i inches long, its average width 5 twelfths. 
The trachea, which is 6£ inches in length, has at first a breadth of only 
3 twelfths, but at the distance of three-quarters of an inch enlarges to 4$ 
twelfths, and so continues for 2 inches ; it then contracts to 2£ twelfths, and 
again at the lower part enlarges to 5i twelfths, and terminates in a large 
transverse bony dilatation or tympanum, of which the length is 7i twelfths! 
the’breadth 1 inch 2 twelfths ; it projects as usual to the left side, where it 
is of a rounded form. The rings of the trachea are 124, broad, firm, and 
well ossified. The bronchi are of moderate width, of about 25 half rings. 
The lateral muscles are strong, the sterno-tracheal of considerable size, 
coming off at the commencement of the tympanum, and there are no inferior 
laryngeal muscles. 
Vol. VII.— 12 
