steller’s WESTERN DECK. 173 
tint, and on the back the dark centres of the feathers 
are more elongated, while below, the bars also take a 
more lengthened form, and are narrower ; on the 
head and neck the yellowish-brown colour pre- 
vails ; the wings are darker, and the greater covers 
are narrowly tipped with white, while the tertials 
continue their curved form, and are nearly as much 
so as in the male Eider. 
Steller’s Western Deck. — Somateria Stel- 
lerii. — Fuligula dispar , Selby. — Polysticla, Eyt . — 
Eniconnetta, G. K. Gray. — Stelleria, Bonap. — Ma- 
cropus, Nutt . — Western Duck , or Pochard of Bri- 
tish authors. — This rare and interesting species 
has been placed in various genera, new appella- 
tions have been proposed by different ornitholo- 
gists for its reception, and it is now placed at tho 
conclusion of the Eiders provisionally, until its struc- 
ture is better ascertained ; the general colouring 
and form of the tertials show a considerable alliance. 
Only one specimen of this bird has been killed on 
the British coasts, in the vicinity of Yarmouth in 
Norfolk, and is now in the Norwich museum. In 
Europe it is nearly equally rare ; a specimen killed 
in Denmark, nearly at the same time that the Nor- 
folk bird was procured, was at the period Mr. Selby 
wrote his History of British Birds considered the 
only one on record ; since, it has been occasionally 
killed in Northern Europe, and Temminck, in his 
Supplement, states that it occasionally wanders into 
Germany. It also ranges to North-eastern Asia, 
