98 Dr. L atiiamV EJJay on the Trachea or Windpipes of Birds. 



but under the eye of the Anatomift, who examines them internally, 

 how widely do they differ ! — In the tame one, little more occurs in 

 refpetf: to the windpipe than is to be feen in the common Cock, 

 whilft in the 'wild Swan it is lengthened greatly, and, entering a hol- 

 low in the keel of the flernum, forms a doubling therein, before it 

 returns to enter into the cavity and attach itfelf to the lungs, as 

 will be hereafter (hewn. 



It feems unneceffary to fay more on this fubjeft in a general way, 

 as the circumftances will occur in courfe under their particular 

 heads : to avoid repetitions, therefore, I (hall proceed to the defcrip- 

 tions themfelves ; and, firit, of thofe birds in which the trachea or 

 windpipe obtains a fingularity, from its various inflexions in its paf- 

 fage to the lungs, without greatly deviating from the uniform and 

 cylindrical fhape, beginning with 



L TETRAO UROGALLUS— Wood Grous. Tab. ix. .Fig. 1. 



T. fufco-rufus, capite colloque cinereis, gula abdomineque riigris, 



axillis albis. 

 Tetrao Urogallus, Linn. Syjl. Nat. p. 273.— //a/. Orn. 2. p. 634.— 



Frifch.t. 107,108.— Rail Syn.Av.y.^, A. I.— Will. Orn. t. 30. 

 Auerhahn, Befch. der Bed. Nat. Fr. iv. p. 589. t. 18. f. 2. 

 Coq de Bruyere, Buf. Oif. ii. p. 191. t. 5.— P/. Enh 73, 74. 

 Wood Grous, Cock of the Wood, Br. Z00L i. t. 40, qi—^Gen. 



Syn. iv. p. 729. 



In order to afcertain the fpecies here meant, it is right to obferve, 

 that the Wood Grous is well reprefented in the Britifi Zoology, and 



« voix, mais cela ne fuffiroit peut-ctre pas pour prouver que kurs efpeces foient differ- 

 « entes : cctte diverfite n'excedant pas la fomme des impreffions tant interieurs qu'ex- 

 « teneurs, que ladomefticite & fes habitudes peuvent produire a la longue fur une race 

 « aflujettee." Hifi. da Oif.1%. p. 24. (f). , 



is 



