#8 HISTORY OF 



horizontal with the part going towards the bronehiae, or lower 

 extremity. 



The following Cut represents the sternum and trachea of 

 C. Bewickii, a portion of the bone on the inside being removed 

 to shew the convolution of the tube : 



In the Hooper, at the same point, the part^of the tube'of the 

 trachea going towards the mouth, is placed vertically over that 

 going towards the bronchiae. See the following Cut : 



Another species of Swan has lately been described by Mr. 

 Yarrell, (Cygnus Buccinator of the " Fauna Boreali Ameri- 

 cana,") of which, as we think it not improbable it may occur 

 in the British Isles, being an American species, we shall give a 

 short description. It has the bill entirely black ; and the 

 trachea, after penetrating the keel, recurves, having a horizontal 



