201 



horny substance termed a nail; the edges of the 

 mandibles pectinated; nostrils small oval; tongue 

 broad, fringed at the base; toes three before web- 

 bed; one behind. 



1 CYGNIJS ) WHISTLI]STG SWAN, WILD SWAN, 

 ') ELK OR HOOPER. 



A. rostro semicylindrico atro, cera flava, corpore 

 albo. Lath. 



The bill is yellowish at the base, with a black 

 tip ; the cere is yellow ; the whole plumage is of a 

 pure snowy white; near the skin cloathed with a 

 thick down ; the legs and feet are of a brown black. 



The female lays 6 or 7 large white eggs, in a nest 

 composed of withered leaves, reeds and rushes. 



The trachia or wind-pipe passes down the neck, 

 the whole of its length ; after which it enters the 

 keel of the sturnum, passing backwards, therein the 

 whole of its length, when it bends upwards and for- 

 wards and then enters the cavity of the breast to 

 communicate with the lungs. (See a valuable paper 

 in the 4 Vol. of the Lin. Trans, by Dr. Latham.) 



2. MANSUETUS. MUTE OR TAME SWAN. 



A. rostro rubro, basi tuberculo carnoso nigro, corpore 

 albo. Lath. 



The bill is tipped with black, and having on the 

 D d 



