LONG-TAILED DUCK. 
367 
inches longer than the others; these, with the two adjoining ones, 
are black, the rest white; legs and feet dusky slate. 
On dissection, the intestines were found to measure five 
feet six inches. The windpipe was very curiously formed; be- 
sides the labyrinth, which is nearly as large as the end of the 
thumb, it has an expansion immediately above that, of double 
its usual diameter, which continues for an inch and a half; this 
is flattened on the side next the breast, with an oblong window- 
like vacancy in it, crossed with five narrow bars, and covered 
with a thin transparent skin, like the panes of a window; an- 
other thin skin of the same kind is spread over the external side 
of the laybrinth, which is partly of a circular form. This singu- 
lar conformation is, as usual, peculiar to the male, the female 
having the windpipe of nearly an uniform thickness throughout. 
She differs also so much in the colours and markings of her plu- 
mage as to render a figure of her in the same plate necessary; 
for a description of which see the following article. 
