LONG-TAILED DUCK 



95 



ter, 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 transpa- 

 rent skin, like the panes of a window ; another thin skin of the 

 same kind is spread over the external side of the labyrinth, which 

 is partly of a circular form. This singular 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 colors and markings of her plumage as to render a figure 

 of her in the same plate necessary; for a description of which see 

 the following article. 



