Dr. Latham*/ Efay on the Trachea or IVindpipc: ofBird^ 1 1 3 



This fpecies is larger than any of the Duck genus before men- 

 boned, except the Swan and Semipahnated Goofe, and the trachea i, 

 ftouter m proportion. The globnlar part is a trifle bigger than in 

 the P,„ta,l, but lofes its round foape in feme meafure at the lower 

 portion of it : it is likewife much lefs fmooth on the furface, ban's 

 omewhat furrowed, and marked with minute wrinkled lines. The 

 bony arch is much deeper than in any of the foregoing, is attached 

 to the globular part almoft the whole of its lcngtb, and in fome 

 ipecunen. meafures full three-fourths of an inch. The whole of 

 this part hkewife is ftronger than in any fpecies before defcribed 

 The labynnthic or globular part of the trachea indeed varies a little 

 in refpaft to flze, both in the wild and tame forts, but is in general 

 larger in the domefticated ones. Much coiitroverfy has been held 

 concerning the Curved-bilkd Duck; fome fuppofmg it to be a variety- 

 only of the Mallard, and others wilhing to make it a diftinft 

 pecies. This bird has not come under our view anatomically, 

 having only met with it in menageries, or preferved in colleaions;' 

 but it is to be wiflied that a ftricl comparifon may be made in re- 

 ipea to the trachea, by means of which I have not a doubt of the 

 different opinions being at once fettled. 



XVIII. ANAS MOSCHATA— Muscovy Duck. SM.xiv. Fig.1,2. 



Tab. xvi. Fig. 5, 6. 



A. facie nuda papillofa. 



Anas mofchata, Linn. Syft. Nat. i. p. igg.-^-Ind. Orn. ii. p. 846,— 



Raii Syn. Av. p. \\%.—Frifch. t. 180. 

 Le Canard mufque, Btif. Oif. ix. p. 162. pi. q.—P!. E„L 989. 

 Die Turkifche Ente, Schr. der Bed. Nat. Fr. iii. p. 3?2 . t. 7 . f. ,. 

 Mufcovy Duck, Gen. Syn. vi. p. ^6.— Will. Orn. p. 381, 382. ' 



The trachea in this bird is flout, and nearly of equal diameter, but ' 

 Vol. IV. q__ a trifle 



