Fauna, and Stratigraphy of the Stonnberg Series. 



391 



anterior end of the dorsal surface is a fragment of a clavicle, which 

 here at its distal end is a thin plate of bone. 



Humerus. The left humerus is slightly larger than the right and 

 has the deltoid portion bent into the body of the bone slightly more 

 than the other. Both hurneri are complete and are of the general 

 type seen in the Vienna specimen of Thecodontosaurus skirtopodus, 

 although the bottom of the deltoid crest is just beloiv the middle of 

 the bone. The deltoid crest is sharply cut off from the lateral edge 



UKI 



A B 



Fig. 24. Masxospondyhis harriesi, Br. 



Right humerus (5145). 

 A. Anterior view. B. Medial view. X 3. 



of the proximal portion by an abrupt change in the outline of the 

 bone; and the process is but slightly bent from the general plane 

 of the upper half of the bone. 



The outer edge of the proximal end is strongly thickened to form 

 a rounded knob about 35 mm, from the medial angle. 



The medial edge of the bone forms a regular sweeping concave 

 curve from the caput humeri to the inner condyle. The distal end 

 is strongly broadened, and on the inner face there is a shallow 

 depression between the two condyles. Anteriorly there is a medial 



