Dinosaur from South Africa. 1G9 



strongly developed. Below the head the shaft thins rapidly 

 until at its middle it has an antero-posterioi' thickness of 

 12 mm. and a width of 10 mm. Thence it thickens towards 

 the distal end. The anterior face is flat, with a prominent 

 edge on the lateral side and a rounded edge medially. The 

 outer sharp edge is continued down to the anterior distal 

 process. The posterior border of the shaft is rounded. 



The distal surface is trapezoidal inform. The inner ante- 

 rior border is 20'5 mm. long, the posterior outer border 

 16 mm. long, while the posterior inner border is 12 mm. long. 

 The anterior process lies 7 mm. above the posterior process. 

 Between the two on the outer surface of the bone is a shallow 

 groove. 



Cervical Vertebra. — The length of the body is 31 mm. 

 The anterior articular surface is slightly larger than the 

 posterior. Both are considerably higher than broad. The 

 body is pronouncedly amphiccelous. There is a prominent 

 median ventral keel, sharper in its anterior half. The whole 

 body is strongly compressed laterally, having a width at the 

 middle of 5 mm. and at the anterior end of 8 mm. The 

 canal has a height and breadth anteriorly each of 5 mm. 

 The ends of the zygapophyses are missing. The dorsal spine 

 was low and fairly long, with a somewhat convex upper 

 border. 



Ischium. — A portion of what is probably the left ischium is 

 preserved, including the proximal articular surface. The 

 bone is bent strongly backwards, more so than in Tltecodonto- 

 saurus anxiquus as figured by von Huene, so that the ischium 

 must have been directed very strongly backwards. At the 

 broken distal end the bone is 12 mm. thick and 6'5 mm. 

 broad. The inner border of the proximal surface is straight, 

 the lateral border has a prominent outward projection, the 

 maximum width of the surface being 9 mm. 



The nature of the tibia and the ischium mark these remains 

 off from the Plateosauridae, and place them among the Theco- 

 do.ntosauridse. They indicate a member of this family 

 smaller than any hitherto described from South Africa, and 

 which cannot be exactly identified with any European 

 species. I propose, therefore, to give it a new specific name, 

 'Thecodont osaur us minor. 



Tape. S3.A.M. Cat. no. 3451. 



Locality. Pitsing, Maclear, C.P. Cutting in road to 

 Naude's iNek. 



Horizon. Red Beds, just below halfway from base. 



