•I2b Dr. Latiiam'j EJay on the Trachea or Windpipes ofBirdu 



Fig. 3. The trachea o£ the Scaup Duck. 



4. The oppofite fide of the fame : — a a. an oblique mufcle ferving 



to unite the bafe of the bronchia: or lung-pipes, and may 

 be traced in mod fubjects whilft recent. 



5. Trachea of the Pochard. 



6. The fame in an oppofite direction. 



Tab. XV. 



Fig. 1, 2. Two views of the windpipe of the Golden Eye. 



3. I'rachea of the Velvet Duck. 



4. The bony cafe of the laft below the larynx, feen on the oppo- 



fite fide. 



5. An oppofite view of the bony hollow of the middle part. 



6. View of the uppermoft bony cafe taken from a different 



fubjecl, ferving to (hew how this part appears in fome 

 fpecimens. 



7. View of the bottom part of the fame trachea, 



8. Trachea of the Shieldrake. 



9. View of the fame, feen on the oppofite fide. 



Tab. XVI. 



Fig. I. Trachea of the Red-breafted Merganfer, 



2. Ditto feen in the oppofite direction. 



3. Trachea of the Smew. 



4. An oppofite view of the fame. 



5. The trachea of an Old Mufcovy Duck. (See that of a 



younger one in Tab. XIV. f. 1, 2.) 



6. The fame feen on the other fide. 



IX. Ob- 



