AVES. 
291 
Width of the same. 0.008 
Width of the centrum posteriorly... 0.0045 
Depth of the same... 0.0055 
Length of the centrum of the third dorsal from the fundus of the anterior 
facet.. 0.0130 
Width of the same below. 0. 009 
Width of the anterior facet. ... 0.005 
Vertical depth of the same.... 0. 005 
Length of the fourth vertebra.... 0.015 
Depth of the posterior articular face. 0. 006 
Width of the same . ... . 0. 0075 
Length of the seventh dorsal centrum. 0. 0180 
Width of the same anteriorly. ..... 0. 0080 
Depth of the same anteriorly . 0.0070 
Diameter of the neural canal of the same I • *. " 
Length of the sacrum to the tenth centrum. 0.0650 
Width of the centrum of the first sacral posteriorly... 0. 0090 
Width of the centrum of the ninth sacral posteriorly... 0. 0135 
Combined lengths of the four anterior caudals... 0.0200 
Width of the centrum of the anterior. 0. 0060 
Depth of the same....... 0. 0035 
Length of the plowshare-bone.... 0. 0070 
Width of the same anteriorly. 0. 0050 
Width of the same posteriorly..... 0. 0065 
Depth of the hypapophysis. 0.0050 
Of the scapular arch, I have the proximal ends of both coracoid bones, 
and the distal end of one of them, and the proximal portion of the left limb 
of the furcula. The latter presents the coracoid facet and flat internal face, 
as in the Eagles, but the anterior border is less convexly arched than in the 
A. chrysaMos and A. bonellii. The anterior extremity of the coracoid is as 
long as that of A. chrysaMos, but narrower, while its humeral facet is as wide 
and longer. The scapular fossa is smaller and more oval. The inner angle 
of the distal extremity is produced, as in the Golden Eagle, but the fossa of 
articulation with the sternum, while as wide as that in the Golden Eagle, is 
only two-thirds as long. The proximal pneumatic foramina are large, and 
not concealed by overhanging borders. 
Measurements of the scapular arch. 
Length of the coracoid anterior to the humeral facet 
Length of the humeral facet. 
M. 
0. 0011 
0. 0150 
