Dr. Laruam’s Ejay on thé Trachea or Windpipes of Birds. 121 
WE pafs uow, tothe Merganfer or Goofander tribe, in every f{pecies 
of which freauen tins this kingdom fomewhat occurs worthy of 
notice. 
_XXY. MERCtS SERRATOR__Rep- -BREASTED MERGANSER. 
: Tab. xvi. Fig. I, 2. 
M. crifta dependente, peétore rufefcente variegato, collari albo. 
- Mergus Serrator, Linn. Sy/t. Nat. 1. p. 208.—Ind.. Orn. u. p. 829: 
Raii Syn. Av. p.135.A. 4.—Brif. Orn. vi. p. 237. pl. 23. 
~ Le Harle huppé, Buf. O7/. vii. p. 273.—P/. Enl. 207. 
+ Der Haubentaucher, Schr. der Berl. Nat. Fr. iu. p. 374, t. 7. f. 5. 
Meerachen, Beck/. Vog. Deuifch. ii. P+ 7325 Note * 
Red-breafted Merganfer, Gen. Syn. vi. p. 423. Leap, Zool, No. 261. 
HI, 93 —Will. Orn. p. 336. t. 64. —Edw. fi 95- 
oT he whole of the Merganfer genus, on outward infpection, feems 
' greatly allied to that of the Duck, and to differ chiefly in the bill, 
which, inftead of being flattifh, thick, and rounded at the end, is 
long and narrow, having the edges furnifhed with numerous fharp 
proceffes like the teeth of a faw, which has given rife among fportf- 
men tothe name of Saw-billed Ducks or Divers. In the Duck genus. 
the trachea will be found tobe more or lefs compofed of griftly rings, 
approaching indeed in many very nearly to bone, and conneéted to 
each other by means of cartilaginous membranes, except in the 
labyrinthic parts, which are Atily bone; but in the Merganfer tribe 
the whole feems to be compofed of little elfe than bone, and, in the 
fpecies now before us, the bony rings or plaits fold over one another 
in a remarkable manner, as may be feen in the figure. It is in this 
too, as in the genus of Duck, that the fingularitics obferved in the 
trachea are only in the male fex. But, to the point 
Vor. IV. Oi ~ The 
