GOLDEN EYE. 373 



of the bird first described. I have seen young males putting 

 forth n few small white feathers, the commencement of the 

 white patch at the base of the upper mandible, by the end 

 of January, but it more frequently begins at a later period, 

 namely, in March. 



The trachea of this species is singular in its form, differ- 

 ing from the character of those of the Ducks in general, and 

 bearing some resemblance to those of the Mergansers, both 

 in the tube and in the labyrinth. The length is about nine 

 inches, the diameter of the upper half of the tube equal in 

 size and small ; at the commencement of the second half, 

 the tube is dilated to four times the previous size, _and the 

 rings are so arranged as to lay flat upon each other. The 

 last, or fourth, portion again contracts till it ends in the 

 labyrinth, of which the vignette below represents the sur- 

 face nearest the back of the bird. The bronchial tubes are 

 observed to be unequal in length, to compensate for the 

 obliquity of the inferior surface of the labyrinth, which, as 

 usual, is made up partly of bone and partly of membrane. 

 The voice is said to be very loud, and hence this Duck was 

 called clangula. 



