Fauna and 'Stratigraphy of the Stormberg Serifs. 



435 



measured along the lower border and stands about 40 mm. above the 

 posterior border, which is 90 mm. long. The inner border is strongly 

 rounded with a length approximately equal to that of the hinder border. 



Fibula. The left fibula is preserved entire, although the bone 

 surface is somewhat shattered. Its greatest length is 'til mm. The 

 proximal end is expanded, its inner surface slightly concave, its outer 

 surface convex. The greatest breadth of the proximal end is 140 mm., 

 while it is but 44 mm. thick. The anterior border of this end is 

 thin and sharply rounded, while posteriorly the bone is thicker. The 

 upper edge is higher behind than in front. 



The shaft is flat on the inner side and strongly rounded laterally. 

 It has a diameter of 50 



Fig. 47. Melanorosaurus readi, Htn. 

 Metatarsal III. Front view. X 1. 



D 



The distal end is slightly swollen in an antero-posterior direction. 

 The lower surface is 85 mm. long and 53 mm. broad, convex on the 

 inner side and obliquely flattened laterally. The anterior face of the 

 distal end is broadly rounded, while the posterior face has a sharp 

 ridge on its inner side, sloping away to the outer face as a flat surface. 



Metatarsal. One of the luetatarsals is preserved, probably the 3rd. 

 It is a straight bone having a length of '200 mm. The proximal articular 

 surface is triangular, the anterior angle being slightly obtuse. The 

 surface is 80 mm. broad, and has a maximum thickness of 40 mm. 

 At its thinnest part the shaft is 44 mm. broad and 26 mm. thick. 

 The distal articular surface is 62 nun. broad. Distally, the anterior 

 surface of the bone is very flat, while posteriorly it is slightly concave 

 with a shallow wide median groove just above the articular surface. 



Type. Incomplete skeleton. S. A. Mus. Cat. Nos. 3449, 3450. 



Locality. Thaba 'Nyama, near Bensonvale, Herschel, C. P. 



Horizon. Near base of Red Beds. 



28 



