380 Synopsis of the Birds 



and accidental visitant in Italy. Trachea forming two cir- 

 cumvolutions before entering the sternum.* 



73. ANAS. 



Anas, L. Gm. Briss. Lath. III. Cuv. Vieill. Temm. Ranz. 

 Anas, Brehm. Nob. Obs. and Cat. of birds of the U. S: 

 Tadoma, Cairina, Anas, Rhynchaspis, Dajila, Mareca, Quer- 

 quedula, Stoph. 



Bill broader than high at base, more or less broader at 

 tip than at base, somewhat flattened, much depressed towards 

 the point, obtuse, marginal teeth lamelliform, weak ; upper 

 mandible convex, curved and unguiculated at tip, nail slen- 

 der ; lower narrower, flat, entirely covered by the margins 

 of the upper: nostrils basal, approximated, oval, small, open, 

 pervious, covered by a membrane : tongue fleshy, thick, 

 broad, fimbriated on the sides, obtuse. Head small ; neck 

 slender, subequal to the body : body much compressed, slen- 

 der. Feet nearly central, rather small and feeble ; tarsi sub- 



* 2. Cygnus olor, Vieill. White ; bill red margined with black ; bare 

 space round the eve, and a fleshy knob on the forehead, black. 



Young dark cinereous. 



Mute Sican, Lath. Cigno reale, St. degh. ucp. v. pi. 554. Cygnus gib- 

 bus, Bechst. Anas olor, Gm. 



Inhabits the eastern part of Europe, and Asia: never observed wild in 

 America. Domesticated throughout the world. Trachea without cir- 

 cumvolutions. 



3. Cygnus nigricollis, Steph. White, head and neck black, bill red. 

 Black-necked Swan, Lath. Anas nigricollis et melanocephala, Gm. 



Not figured. Scudder's Museum, New-York. 



Inhabits South America: common at the Falkland Islands, and the 

 Straits of Magellan. 



4. Cygnus atratus, Steph. Black, quill feathers white, bill red. 

 Black Swan, Lath. .'Inns atrata, Lath. Anas plutoniu, Shaw Nat. 



Misc.pl. 108. Philadelphia and Neio-York Museums. 

 Inhabits Australia. 



