258 



Allen's naturalist's library. 



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

 structure presents many striking Columbine 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. — 'iVwW.oi Pte7'ocJes exustiis. Fig. 2. — ^VvXloi P. exiistiis. 



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 Pterodes alchatus. 



