164 



TEETIAET VEETEBEATA OF THE PATtM. 



The humerus, ulna, and tibia enumerated below, together with some small astragali similar to that 

 described above (p. 149) and figured in text-fig. 52, probably belong to this species or to P. minor. 



C. 8881. Right humerus with its upper part much crushed (text-fig. 56). This specimen differs 

 more from the humerus o£ the later Proboscideans than does the humerus o£ P. beadneUi 

 described above. The large rounded head {h.) is abruptly truncated on the inner side by 

 the flat inner face o£ the upper part of the shaft. Anteriorly it bears a small " lesser " 



Text-fig. 56. 



Eight humerus of Palceomastodon {l}jr>arvus -. A, from front ; B, from inner side. 

 h.g., bicipital groove ; c.f., coronoid fossa ; d., deltoid crest ; g.t., greater tuberosity ; h., head ; i.e., inner 

 condyle ; l.t., lesser tuberosity ; o.c, outer condyle ; s.r., supinator ridge ; tr.i., inner part of trochlea ; 



tr.o., outer part of trochlea. 



^ nat. size. 



tuberosity {l.t.), which is separated by a deeply concave bicipital groove (b.g.) from 

 the greater tuberosity (ff.t), which is very large and rises considerably above the head ; 

 from it a ridge forming the outer edge of the bicipital groove runs down the anterior 

 face of the upper third of the shaft. It is difficult to determine the exact form of 

 the upper portion of the shaft owing to the crushing it has undergone, but it can be 



