181 
DIVISION 1. 
BEAK GIBBOUS AT THE BASE. 
ANAS CYGNUS. 
WHISTLING OR WILD SWAN 
Bill semi-cylindric, black : cere yellow. 
Anas Cygnus, Lin. Gme, 
Cygne Sauvage, Buffon. 
Cygne a bee jaune ou sauvage, Tem- 
minck. 
Wild Swan. Lath. Pen. Bew. Mont. 
PROVINCIAL. 
GERMAN SWAN, ELK OR HOOPER. 
Many authors have considered the Wild 
and the Tame Swan, as varieties of the 
same species, but independent of the dif- 
ference which is observable in the external 
appearance, the formation of the trachea 
well as the breast-bone itself is so strik- 
