CONTENTS. 



FAMILY I. ANSERINE. GEESE AND ALLIED SPECIES 579 



Genus I. Ansek. Goose ... 585 



1 . Anser ferus. The Thick-billed Grey Goose 589 



2. Anser segetum. The Narrow-billed Grey Goose 595 



3. Anser brachyrhynchus. The Short-billed Grey Goose 602 



4. Anser albifrons. The White-fronted Goose - 609 



5. Anser Canadensis. The Canada Goose - 614 



Genus II. Beenicla. Bebnicle Goose - - 619 



1. Bernicla leucopsis. The White-faced Bernicle- 



Goose .... 622 



2. Bernicla Brenta. The Black- faced Bernicle- 



Goose ... . 629 



3. Bernicla ruficollis. The Bed-necked Bemicle- 



Goose .... 634 



Genus III. Chenaiopex. Fox-Goose - - 637 



1. Chenaiopex iEgyptiacus. The Egyptian Fox- 



Goose - - - - 639 



Genus IV. Plectroptebus. Spue-winged Goose - 643 



1. Plectropterus Gambensis. The Gambo Spur- 

 winged Goose - - 644 



FAMILY II. CYGNIN^. SWANS AND ALLIED SPECIES 646 



Genus I. Cygnus. Swan - - - 649 



1. Cygnus immutabilis. The Changeless Swan - 654 



2. Cygnus musicus. The Whooping Swan - 659 



3. Cygnus Bewickii. Bewick's Swan - - 669 



4. Cygnus Americanus. The American Swan - 675 



