496 Bulletin Meerican Museum of Natural History. [Vol. XXXIV, 
The calcaneum, I suppose, is a left one. The tuber extending laterally 
backwards and upwards is flat from the latero-anterior side and has a 
cushion-like thickening at the postero-medial side, for fixation of the ten- 
dons. ‘The upper articular face of the tibia is quite flat, the lower one is 
convex and has its anterior border more rounded and higher than the pos- 
terior one. The greatest vertical extension at the tuber is 9 cm., the trans- 
verse direction measures about the same. 
Caudal vertebre: They are of course not very characteristic of the species. 
‘They are both of the same length, 7.2 cm. (at the neuro-central limit). 
One of them, a centrum only, is of the anterior third of the tail (Fig. 18). 
Fig. 16. Left caleaneum of Erythrosuchus africanus Broom, in the British Museum, 
Natural History (Coll. Watson). London: a anterior view, b posterior view, c upper view, 
d lateral view, e from below. i. 
Its posterior articular face measures 5 cm. in vertical and the same in trans- 
verse direction. The section of the vertebra in the middle is cuneiform, 
rather sharp below. It has distinct articular faces for the hzemapophysis 
at the posterior end, but nothing of that kind at the anterior end. The 
neural canal-is deep. Its neural arch possessed big transverse processes 
as shown by the deep curvature of the contact line of the centrum and arch. 
The posterior vertebra may be the beginning of the last third of the tail 
(Fig. 19). It still shows the greater part of the neural arch without any 
trace of a transverse process. The anterior articular face measures 3.2 cm. 
in vertical and in horizontal direction. ‘There is a median longitudinal ridge 
