276 ANATID.E. 



of the neck, bluish-black, tinged with rich purple and green ; 

 behind the eye, on the ear-coverts, and thence upwards to 

 the crown of the head, and backwards to the occiput, a trian- 

 gular patch of pure white ; the feathers of the head elongated 

 forming a crest which is elevated at pleasure ; lower part of 

 the neck white ; back, rump, and tertials black ; scapulars, 

 wing-coverts, and secondaries white; primaries greyish-black; 

 tail-coverts and tail-feathers pale ash-grey ; breast, belly, and 

 all the under surface of the body white ; legs, toes, and 

 membranes yellow. Whole length fifteen inches. From 

 the carpal joint to the end of the longest quill-feather six 

 inches and three-quarters. 



The female is smaller than the male ; the head and neck 

 ash-brown, with a patch of white behind the eye ; upper part 

 of the back greyish-brown, lower part black ; wing-coverts, 

 primaries, and tertials dark greyish-brown ; secondaries white; 

 tail ash-grey ; breast and belly dull white ; vent and under 

 tail-coverts greyish- white ; legs and toes bluish-black : whole 

 length thirteen inches ; wing six inches and one-quarter. 

 Young males in the first autumn resemble females. 



The trachea, described by Mr. Audubon, " is five inches 

 long, much flattened, its rings unossified, its diameter at the 

 top two lines and three-quarters, towards the lower part three 

 lines, having scarcely any appearance of dilatation at the part 

 which is so excessively enlarged in the Golden-Eyed Duck, 

 Avhich, in form and habits, is yet very closely allied." 



The specimens from which the figure and descriptions here 

 given were derived, were obligingly lent me for my use in 

 this work by Mr. Joseph Clarke of Saffron Waldcn. 



