PEIMATES FEOM MiDAGASCAE. 



135 



the head is cousiderably raised, while the small articular facet on the anterior border 

 is depressed, thus causing the plane of the proximal end of the bone to lie somewhat 

 obliquely with reference to the long axis. The tubercle is wide and has a deep oblique 

 depression. The interosseous edge is less sharp than in Megaladapis and its lower 



Text-fig. 34. 



Text-fig. 35. 



Eadius of 

 Meyaladapis grandidieri. X i. 



Radius of 

 Palceopropithecun maximus. X .-; 



fourth is much roughened. The anterior surface is deeply concave. The outer edge 

 of this concave surface is clearly defined by a ridge of regular curvature running from 

 the lower end of the tubercle nearly to the carpal end of the bone. The central part 

 of the posterior surface is broad and flat, but its outer edge does not present the sharp 

 angular ridge seen in Megaladapis owing to the very convex transverse curvature of 



