258 



Lloyd's natural history. 



ties. Thus Mr. Ogilvie Grant writes : — " Tlieir general 

 structure presents many striking Colunibine characters, as in 

 the vocal organs^ pterygoid bones, and the presence of basi- 

 pterygoid processes {bp) in the skull (fig.i), the shoulder-girdle, 



Fig. I. — 'SV.wVioi Pterocles exustus. Fig. 2. — ^Vviiloi I\ exustus. 



Sternum, and especially the great deltoid process of the humerus, 

 or upper-wing bone ; but the digestive organs are like those 

 of the True Game-Birds." 



Fig. 3.— Sternum oi PU rocks alchalus. 



