Explanation of the Plates. 391 



c. d. Lower portion of the trachea of the King Duck (Anas spec- 

 tabilis Linn.) in two points of view, taken bj^ permission 

 from a specimen in the collection of Joshua Brookes, 

 Esq., not hitherto figured. 



e. Trachea of the Red-crested Duck (Anas I'ufina Pallas), not 

 hitherto figured. 



/. Lobated hind-toe of the Ducks forming the second di- 

 vision. 



g. Ensiform process of the sternum in the Goosander (Mer- 

 gus WIer ganser Linn.). 



//. Trachea of the Goosander. The representations referred 

 to by the letters a. e. and h. are one-third less than the 

 natural size. All the rest are of the natural size. 



VOL. XV. 3 E XVI. On 



