352 Annals of the South African Museum. 



present. Remnants of 12 teeth are preserved on the right dentary, 

 and of 5 or 6 on the left, Of these latter the 4th is small and 

 nearly complete. It shows that the teeth were flattened, pointed, 

 and simple, provided with serrations on the anterior border. The 

 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 

 symphysis. 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 part of the angular 

 lying within the splenial and dentary. There is a postarticular 

 process passing behind the extremity of the quadrate. 



Fig. 13. Sphenosuchus acntus, Htn. 

 Anterior caudal vertebra. X 1. 



Vertebrae. The anterior cervical 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 preserved. 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 3rd cervical, slightly expanded at the crest, with a shallow 

 groove running down the posterior border. The anterior ribs are 

 double-headed. 



There is an anterior caudal preserved (Text fig. 13). It is 16 mm. 

 long and has a total height of 37 mm. The body is somewhat con- 

 stricted in the middle, having a minimum width of 8 mm. The 

 ventral surface is broadly rounded. The ventral border is concave 

 with the posterior end lower than the anterior. The anterior surface 



