590 AVES. 



by a membrane, and open in front ; legs Ehnrt, tibia half naked ; feet with 

 three anterior toes only, long and webbed to their extremities, lateral ones 

 marginated ; nails short, blunt ; wings long, narrow ; quills short, and the 

 Becondaries long. 



Diomedea extilans. — The Wandering Albatross. Plate xlvi. fig. 3. Uc • 

 scribed, vol. iii. p. 370. 



Genus 11.— ANSER.— ijaj/. 



Generic Character.— UiW as short, or shorter than the head ; deeper than 

 broad at the base, and narrowed towards its extremity ; nostrils large, ellip- 

 tloal, longitudinal, placed near the middle of the bill ; neck longer than in the 

 Anas, and shorter than in the Cygnus ; legs longer than the former, and 

 j)liiced farther forwards, near the centre of gravity ; three anterior toes en. 

 tirely connected by a membrane, hallux articulated on the tarsus, without 

 any connecting membrane ; wings long ; first and second quills the longest. 



Anser leucopsis. — The Barnacle Goose. Plate xlvi. fig. 6. Upper parts 

 barred with bluish-gray, black, and white ; crovm, back of the neck, shoul- 

 ders, throat, breast, and tail, black ; face, cheeks, and chin, under parts, 

 white ; tibia marked with dusky lines ; legs and feet dusky, very short and 

 thick. Twenty-six inches long- Inhabits the arctic regions. 



Anser rtificollis The Red-Breasted Goose. Plate xlvi. fig. 5. Front, 



crown, nape, and back parts of the neck, black ; and a black patch under 

 the eyes ; a white space between the eye and bill ; two stripes of white, ex- 

 tending from the back of the eyes to the bottom of the neck ; neck, and upper 

 part of the back, deep rusty-red ; back and wings dusky ; lower part of 

 breast and abdomen black; venter and crissura white; bill brown; legs 

 dusky. Twenty-one inches long. Inhabits the arctic regions. 



Anser Cyonoides .—The Chinese Goose. Plate xlvi. fig. 4. Back and up- 

 per 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 

 eide in front of the eyes ; irides reddish-brown ; abdomen and crissuln white ; 

 legs orange. Three feet long. Inhabits China. 



Genus 12.— CYGNUS.— ila?/. 



Generic Character.— Bil\ equal in breadth throughout, very deep at the 

 base, its depth being greater than its breadth ; generally furnished with a 

 callous knob at the base ; nostrils oval, placed near the middle of the bill ; 

 neck very long ; cheeks naked ; 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 Swau. Plate xlvi. fig. 7. Described, vol. 

 iii p. 409. 



Cygnus olor.— The Tame Swan. Plate xlvi. fig. 8. Described, vol. iii. p. 

 406. 



Genus 13. — ANAS. — Linnccus. 



Generic Character.— KM of medium size, broader at the base than deep, 

 straight, depressed, and nearly of equal breadth throughout ; upper mandi- 



