362 NATATORES. HARELDA. 
and abdomen chestnut-brown, becoming darker as it ap- 
proaches to the vent, which latter, and the under tail- 
coverts, are black. Tertials long and curved; the inner 
web narrow, and, with the shaft, white; the outer web 
broad and black. Quills and tail brownish-black ; the 
latter more elongated and pointed than in the rest of this 
genus. 
Genus HARELDA, Ray. HARELD. 
GENERIC CHARACTERS. 
Birt much shorter than the head, high at the base, narrow, 
suddenly contracted towards the tip ; nail of the upper man- 
dible arched; both mandibles laminato-dentato, with the 
lamine prominent, tooth-like, and widely set. Nostrils near 
the base of the bill, lateral, linear, oblong. 
Wings of mean length, with the first and second quill 
feathers equal. 
Tail wedge-shaped, the feathers sharp pointed. In the 
male bird the two middle feathers elongated, narrow, and 
canaliculated. 
Legs short. Feet four-toed, webbed; the outer toe nearly 
as long as the middle one. Hind toe with a large lobated 
membrane. 
Of this genus only one species has hitherto been discovered, 
viz. the Long-tailed Duck of British authors. In its affinities 
it seems nearly allied to the Garrots (genus Clangula), but is 
still separated from them by characters of much importance, 
the bill being more contracted towards the tip, and not being 
so high at the base, near which also the nostrils are situated. 
The tail is also more graduated and acute, and remarkable 
in the males for the elongation of the two central feathers. 
The anatomy of the trachez separates it, too, from both the 
Garrots and the Pochards. This species lives on sea-shores, 
and is a native of the Arctic regions. 
