190 



GRUID^. 



and after making three turns, passes again forwards, then 

 upwards, and ultimately backwards to be attached to the two 

 lobes of the lungs by the bronchial divisions. 



The second representation is taken from the sternum of 

 an old female Crane, and exhibits the trachea still farther 

 extended, and occupying nearly the whole cavity between 



the two bony plates forming the keel : a portion of the 

 plate nearest the observer in both these illustrations being 



