492 



Anxals of the Carnegie Museum. 



ness as it approaches the glenoid cavity. Anteriorly throughout its 

 entire length the blade thins out to a sharp edge, while the posterior 

 margin presents a thickened rounded border. There is no prominence 

 on this border near the constriction, such as is found in many scapulae 

 of the larger Sauropods. Transversely the external surface of the blade 



Vie. I. External view of right scapula of Elosanriis. parvus (No. 5^^)> % ^^^' 

 ural size. S. , spine. 



is convex while the internal is somewhat concave. The spine is placed 

 at right angles to the axis of the bone. The posterior border as it ap- 

 proaches the distal end curves backward abruptly, forming the superior 

 border of the glenoid cavity. In the last two respects the scapula is 

 identical with the typical Moro.saurus sca])ula. The glenoid cavity as in 

 the larger members of this order is formed by the union of the scapula 

 and coracoid though the latter element is wanting in this specimen. 

 See Fig. i. 



Measurements. 

 Greatest length of scapiula, 320 mm. ^2% inches. 



Greatest breadth of scapula, 150 " 5% " 



Least breadth of scapula, 48 " l^ " 



Humerus. — The humerus is moderately stout and about two-thirds 

 the length of the scapula. Proximally it is greatly expanded trans- 



