Dr. Laraam’s Effay on the Trachea or Windpipes of Birds, X11 
XV. ANAS STREPERA—The Gapwat, Tab. xiii. Fig. 7.8. 
A. fpeculo alarum rufo nigro albo.” 
Anas ftrepera, Linn. Sy/ft. Nat. i. p. 200.—Ind. Orn. ii. p. 859.—Raii 
Syn. Av. p. 145. A. 2.—Brif. Orn. vi. p. 339. t. 33. f. 1. 
Chipeau, Buf. O//: ix. p. 187. t. 12.—P/. Enl. 958. 
Gadwal or Grey, Gen. Syn. vi. pe §15.—Br. Zool. ii. No. 288.— 
; Will. Orn. p. 374 te 72. | 
This fpecies is about 15 inches long, but is much lefs common 
than the former. The windpipe is long, and furnifhed with a bony 
bladder and arch. as in the laft fpecies, but differs in fhape, and the 
globular part is not near fo large; it is likewife elongated upwards and 
downwards in an oblique direétion, and is a little compreffed on the | 
fides: it is alfo diftinguifhed from the P/ntail in another particular, 
which is, that the bony orb in that {pecies adheres to the fide of the 
arch by a {mall portion only, whereas‘in the Gadwal it is firmly fixed 
to it at the bottom; that portion of it which lies next to the srachea 
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 3 and this proportion of parts holds ald in every {peci- 
men which hapgeme under my PPR: 
XVI. ANAS PENELOPE—The WicxEon. Tab, xiii. Fig. gu. 
A. cauda acutiufcula criffo nigto, Tali alten L dronte alba, 
‘dorfo cinereo undulato. \ . 
Anas Penelope, Linn. Sy/. Nat. i. p. 202.—Ind. Orn. it. p. 860.— 
Raii Syn. Av. p. 146. A. 3.—Brif, Orn. vi. te 35. £. 2. 
‘Canard fiffleur, Buf. O/f ix. p. 169. t. 10, 11.—P/. Enl, 825. 
Pfeifente, 
4 
