400 Annals of the South African Museum. 



Hind Foot. The right hind foot was found in situ, while most of 

 the bones of the left foot were recovered from the talus below the site. 



Astragalus. - The astragalus is preserved on both sides of the body. 

 The. maximum width from side to side is 712 mm. in the right bone 

 and 76 mm. in the left. The maximum thickness in the medial half 

 is 43 mm. (left, 40 mm.) and the maximum height in that half 31 mm. 

 (left, 30 mm.). The lateral portion shows a high flattened upper 

 portion for articulation with the anterior distal condyle of the tibia 

 and posteriorly a low elongate narrow surface. Below the anterior 

 articular face the bone is undercut posteriorly. The lower anterior 

 angle is a short rounded prolongation, the posterior corner being 

 broadly rounded. The lateral face shows a small shallow concavity 

 for articulation with the calcaneum. 



The thickness at the lateral end is 31 mm. (left, 27 mm.), the 

 height 37 mm. (left, 37 in in.), and the breadth of the anterior upper 

 surface 17 mm. 



The under surface is broadly convex with a faint median ridge 

 running from left to right. 



Calcaneum. A bone which I take to be the calcaneum is preserved 

 in connection with the right foot. It is roughly triangular in outline, 

 with a small lateral protuberance. Its upper surface is concave, its 

 lower convex. Its greatest width is 30 mm. and its maximum thick- 

 ness 21 mm. 



Tarsalia. The only other bone of the tarsus preserved is 



tarsale III, which is found in both feet in articulation with the third 

 metatarsal. In section it is triangular, and its upper surface slopes 

 from the back inwards and forwards so that it is thickest in its 

 posterior and lateral parts. Its under surface is hollowed with a 

 short medial anterior peg to fit closely to the proximal surface of the 

 metatarsal. Its anterior edge is 28 mm. long, its medial face 31 mm., 

 and its other face 41 mm. Its greatest thickness is 20 mm. 



The following table gives the chief measurements of the rnetatarsals 

 and phalanges of the right foot. The 3rd. digit is missing ; it was 

 not preserved with the remainder of the animal, and was possibly 

 lost during life. 



Length. Prox. breadth. Distal breadth. 



Metatarsal I 86 mm. 33 mm. 30 mm. 



Digit 1. 1st phalanx 51 29 23 ,, 



claw 72 22 



Metatarsal II 128 



Digit 2. 1st phalanx 48 30 32 



