706 GEOLOGICAL SURVEY OF THE TERRITORIES. 
PLATE VII. 
Fie. 57.—Right pectoral limb of Centrocercus, same bird as the sternum in Fig. 56 
was taken from. H, humerus, palmar aspect; 7, radius;:«, ulna; s, scaphoid (ra- 
diale) ; c, cuneiform (ulnare) ; z, unciform ; d, index digit ; 9, third metacarpal (an- 
nularis); 9’, second metacarpal (medius); d’, d'', phalanges of the second metacar- 
pal; qi’? phalanx of the third metacarpal. 
Fic. 58.—Lett metacarpus of an adult Centrocercus. 
Fig. 59.—Left metacarpus of the same bird as figured in 57, showing all the seg- 
ments that go to make up the bone in Fig. 58: om, carpale or 0s magnum; Z, UNCl- 
form; 7, index or first metacarpal; 8, pentosteon ; 9’, second metacarpal; oF third meta- 
earpal ( annularis). 
Fig. 60.—Left humerus (Centrocercus), taken from the same bird as in Fig, 57. 
Fic. 61.—Left humerus, anconal aspect, Centrocercua; adult. 
