108 



MAEINE EEPTJLES OF THE OXFORD CLAY. 



On the ulnar side of the upper end there is a small rounded facet, probably for union 

 with the ulna and, perhaps, in part also for articulation with the humerus. The distal 

 end terminates in an oval facet, concave in the middle, but with convex borders. 



Test-Be. 42. 



Bones of fore limb of Sleneosaurus durobrivensis. Left humerus : A, from front ; B, from behind ; 

 C, proximal end ; D, distal end. Left radius and ulna : E, from inner side ; F, from outer side. 

 (E. 3701, = nat. size.) 



(d., condyle of humerus: d.c, deltoid crest; 7;., head of humerus; h.s., surface for articulation with 



humerus ; ol., olecranon ; ;■,, radius : u., ulna. 



