519 



humerus of the allied extinct Megatherioid called Megalonyx. The entepicondyle 

 projects at a part further from the condyle itself in Mylodon than in Nototherium; the 

 ectepicondyle projects, radiad, further than in Nototherium, and it terminates a shorter 

 supinator plate, the upper end of which is not produced proximad in Mylodon as in 

 Nototherium and Phascolomys. 



PLATE CXXVII. 



Nototherium. 



Front (thenal) view of left humerus. 

 Back (anconal) view of the same. 

 Inner (ulnar) side view of the same. 

 Outer (radial) side view of the same. 

 Proximal articular surface of the same. 

 Distal articular surface of the same. 



These figures are of half the natural size. 



Phascolomys latifrons. 

 Fig. 7. Inner (ulnar) side view of left humerus, nat. size. 



Fig. 1. 

 Fig. 2. 

 Fig. 3. 

 Fig. 4. 

 Fig. 5. 

 Fig. 6. 



THE END. 



ERRATA. 



P. 396, 16 lines from top, for "Left" read "Right;" 17 lines from top, for "Left" read "Right;" 9 lines 

 from bottom, for " Right " read " Left." (The parts were drawn on stone without reversing. ) 



56 



