272 
AVES. 
abdomen black ; venter and crissum white ; bill brown ; legs 
dusky. Twenty-one inches long. Inhabits the Arctic regions. 
Anser Cyonoides. — The Chinese Goose. 
Plate LXIV. fig. 4. 
Back and upper parts brownish-gray, edged with a lighter 
colour; throat and breast yellow-brown ; a dark brown broad 
stripe, extending from the nape to the bottom of the neck ; bill 
orange at the base, with a large knob at the base of the upper 
mandible ; a white fillet extends from the base of the bill on 
each side in front of the eyes ; irides reddish-brown • abdomen 
and crissum white; legs orange. Three feet long. Inhabits 
China. 
Genus 12.—CYGNUS.— Ray. 
Generic Character _Bill equal in breadth throughout, very 
deep at the base, its depth being greater than its breadth ; gene¬ 
rally furnished with a callous knob at the base ; nostrils oval, 
placed near the middle of the bill; neck very long ; cheeks na¬ 
ked ; legs placed far behind the centre of gravity ; feet with 
three lateral toes, entirely connected by a web; hallux short 
and free, nails small; wings long ; the second and third quills 
the longest. 
Cygnus atratus. — The Black Swan. 
Plate LXIV. tig. 7. 
Black ; part of the primary and secondary quills white; bill 
bright scarlet, surmounted by a slight protuberance ; legs and 
feet ash-coloured. Four feet two inches long. Inhabits Van 
Diemen’s Land. 
Cygnus olor. — The Tame Swan. 
Plate LXIV. fig. 8. 
Plumage white ; bill orange red ; nostrils, edges of the bill, 
naked space near the eyes, and protuberance at the base of the 
bill, black; irides brown ; legs dusky, with a reddish tinge. 
Five feet long. Inhabits the temperate parts of Europe. 
Genus 13—ANAS.— Linnceus. 
Generic Character. — Bill of medium size, broader at the base 
