104 Annals of the South African Museum. 



dentary forms the whole of the anterior half of the outer surface 

 and thickens in front to meet its neighbour over the whole of the 

 syrnphysis. The splenial forms a large part of the inner surface 

 of the anterior half of the jaw, but takes no part in the 

 symphysis. It has a straight articulation with the dentary along 

 the lower border of the jaw. The fractured end shows a small 

 portion of the angular lying within the splenial and dentary. There 

 is a postarticular process passing behind the extremity of the 

 quadrate. 



The anterior caudal vertebrae have been displaced and the centra 

 are missing. The elements of the atlas cannot be distinguished, 

 although a small curved bone lying on the right exoccipital is 

 probably a part of the pro-atlas. The dorsal spine of the axis 

 is present. It is 30 mm. long, higher in front than behind, and 

 overlaps the 3rd cervical. This latter shows well-developed, strong 

 anterior zygapophyses, shorter postzygapophyses, a straight flattened 

 dorsal spine, and a well-marked neural canal. The dorsal spines 

 of the 4th and 5th cervicals are also present. They are like that of 

 the third cervical, slightly expanded at the crest, with a shallow 

 groove running down the posterior border. The anterior ribs are 

 double-headed. 



Both scapulae, both clavicles, and an interclavicle are present, as 

 \vell as both humeri. 



The scapula is 81 mm. long and expanded both at its proximal 

 and distal ends. The width of the distal end is 43 mm., of the 

 proximal end 40 mm., while the narrowest part of the shaft which 

 occurs just above the proximal expansion measures but 15 mm. 

 in width. There is no acromion process. 



The clavicles are comparatively large, thin bones, whose shape 

 can best be understood from the figure. They have a length of 

 77 mm., and a mean width of about 12 mm. 



The interclavicle is a small narrow elongate bone with a very 

 prominent median ridge running throughout its whole length on 

 the inner side. 



The humerus is 113 mm. long. The proximal end is broad 

 and flattened. The delto-pectoral crest is about 9 mm. long. 

 In the inner view the proximal expansion is seen to be hol- 

 lowed out between the delto-pectoral crest and a well-marked 

 ridge which runs down on the inner side from the proximal condyle, 

 which is slightly swollen and rounded. The shaft is slightly curved, 

 and oval in cross-section ; at the narrowest part the greatest 

 diameter of this oval has a length of 10 mm. The distal end 



