AESINOITHEEIUM. 



33 



the line marking the base of the spine, a little in advance of which there is a 

 roughened ridge. In some specimens there are two or three rough parallel ridges 

 on the inner face of the bone, apparently corresponding with the ribs, or with the 

 intervals between the ribs, against which the bone rests. 



The scapula of Elephas differs from that just described in the following points : — 

 (1) the extreme narrowness of the prescapular fossa ; (2) the presence of a 



Text-fig. 15. 



Left scapula of Arsinoitherium zitteli : A, outer face ; B, articulation. 



a., acromion ; c, coraeoid process ; c.b., coracoid border ; g.h., glenoid border ; g.c, glenoid cavity ; g., spine ; 



ss.h., suprascapular border. ^ nat. size. 



backwardly projecting process on the middle of the spine ; (3) the sharp angulation 

 of the suprascapular border above the origin of the spine, the portion of the border 

 above the prescapular fossa being inclined to the portion above the postscapular 

 at an angle of about 100 degrees; (4) the totally different form of the coracoid 

 border and coracoid process. 



In the scapula of Tlintatherium the postero-superior angle is not produced 



F 



