Dr. Latham'j EJfay on the Trachea or Windpipes of Birds, in 



XV. ANAS STREPERA— The Gadwal. Tab. xiii. Fig. 7. 8. 



A. fpeculo alarum rufo nigro albo. 



Anas ftrepera,jL/«0. Syjl. Nat. i. p. 200. —-Ind. Orn. ii. p. 859.— Raii 



Syn. j4v. p. 145. A. l.—Brif Orn. vi. p. 339. t. ^ f- r - 

 Chipeau, Buf. Oif. ix. p. 187. t. 12. — PL Enl. 958. 

 Gadwal or Grey, Gen. Syn. vi. p, 515. — Br. Zool. ii. No. 288.— 



Witt. Orn. p. 374. t. 73. 



This fpecies is about 15 inches long, but is much Ids common 

 than the former. The windpipe is long, and furnifhed with a bony 

 bladder and arch as in thelaft fpecies, but differs in fhape, and the 

 globular part is not near fo large ; it is likewife elongated upwards and 

 downwards in an oblique direction, and is a little comprefled on the 

 fides: it is alfo diftinguhlied from the Pintail in another particular, 

 which is, that the bony orb in that fpecies adheres to the fide of the 

 arch by a fmall portion only, whereas in the Gadwal it is firmly fixed 

 to it at the bottom ; that portion of it which lies next to the trachea 

 is flat, and in the recent ftate joined thereto clofely by a membrane. 

 The bony arch too is full half an inch in height, differing- in this 

 particular from that of the Pintail, which is fcarcely three-eighths 

 of an inch ; and this proportion of parts holds good in every fpeci- 

 men which has come under my infpection. 



XVI. ANAS PENELOPE— -The Wigeon. Tab. xiii. Fig. 9. 



A. cauda acutiufcula criffo nigro, capite brunneo, fronte alba 



dorfo cinereo' undulato. 

 Anas Penelope, Linn. Syji. Nat. i. p. 202. — Ind. Orn. ii. p. 860. — 



Raii Syn. Av. p. 1 46. A. 3. — Br if. Orn. vi. t. 35. f. 2. 

 Canard fiffleur, Buf. Oif ix, p, 169. 1. 10, 11.— -PI. Enl. 825. 



Pfeifente, 



