804 GEOLOGICAL SURVEY OF THE TERRITORIES. 
PLATE XXIII. 
Hace 121.—Cathartes aura, same asin Fig. 118; right lateral view of sternum; size 
of life. 
Fig. 122.—Same, seen from below. 
Fic. 123.—Same specimen; dotted outline of furculum, life size, from in front; 
giving the general outline from this aspect of this bone as it occurs in the Cathartide. 
Fig. 124.—Same specimen (C. aura); right outer aspect of coracoid and scapula; 
life-size. The bone is represented as resting on the plane of the paper. 
Fic. 125.—Same specimen ; right lateral aspect of the furculum, size of life, show- 
ing entrance to pneumatic fossa, and the distribution of the smaller foramina. 
