Dr. Latuam’s Effay on the Trachece or Windpipes of Birds. vag 
rinth of the fuppofed male of the Mergus minutus of Linneus being 
- in all refpects fimilar to that of the Male Smew, added to the affu- 
rance of fome later writers, who have likewife afcertained the fact, 
and penned their thoughts on the fubjeét. It therefore may be 
concluded that we have no more than three diftina fpecies of 
Merganfer which migrate into this country. 
Tuere. are feveral other birds, befides the above, concerning: 
which I fear we fhall hereafter find ourfelves miftaken ; but this is- 
not the place for fuch inveftigation... The great increafe in number 
of Gentlemen who make Natural Hiftory their ftudy, will no doubt 
greatly contribute to deteét many errors which have hitherto been: 
received as facts for want of due enquiry. 
EXPLANATION or THE PLATES. 
Tas. IX. 
Fig.1. The trachea or windpipe of the Wood Grous, or Cick of the 
Wood, with its feveral appendages.—a. the tongues 4 4. the 
the os Ayoides, or tongue bone, with its parts 3. c. the Jarynx,. 
with the orifice therein for the admiffion of air; dd. muf- 
cles which accompany the windpipe, one on .each fide 5. 
eee. the trachea. 
2. The Marail Turkey, ferving to fhew: the maetiae of the 
trachea rifing sabove the -flefh, on the: breaft before it goes- 
to the lungs. 
3. The Parraka Pheafant, in srhigh hie fame fingularity i is ob- 
ferved in refpeét'to.the trachea, butin a greater degree,. 
running down the breaft the greater part of its length. 
- Tas 
