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EXPLANATION OF THE PLATES. 



Tab. IX. 



Sternum and Trachea of the Crested Pintado (Numida cristata 



Linn.). 



a. Portion of the tube of the trachea, passing downward to 

 the pouch and afterwards to b. the bone of divarication 

 from which the bronchia; arise, 

 c. c. The branches of the furcula. d. The pouch or socket. 

 e. The head of the clavicle. /'. The junction of the scapula 

 with the clavicle, forming a cavity to receive the head 

 of the humerus, g.g. The scapula:. 

 h. Projecting anterior portion of the sternum, i.i.i.i. The 

 ribs. 

 k.k. Membranous portion of the sternum, common to the Gal- 

 linaceous tribe, 

 /. /. The keel or crest. 



Tab. X. 



Sternum and Trachea of the Demoiselle {Ardea Virgo Linn.). 



a. A small portion of the keel removed, to show the depth of 

 the insertion. 



Tab. XI. 



Sternum and Trachea of the Stanley Crane {Anthropoides Stan- 



leyanus Vigors). INIale. 



Tab. XII. 

 Sternum and Trachea of the Black Swan [Anas atrata Linn.). 

 a. The depression in the tube, at the part preceding the bone 

 of divarication. 



'ÏA 



\B. 



