Dinosaxir from South Africa. 469 



strongly developed. Below the head the shaft thins vapidly 

 nntil at its niieUUe it has an antero-posterioi* tiiickness of 

 12 mm. and a width o£ 10 mm. Thence it thickens towards 

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

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

 outer sharp edgo is continued down to the anterior distal 

 process. The posterior border of the shaft is rounded. 



The distal surface is trapezoidal in form. The iinier ante- 

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

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

 'J'he 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 ram. 

 The anterior articular surface is slightly larger than the 

 ])OSterior. Both are considerably higher than broad. Tiie 

 body is j)ronouncedly amphicoelous. 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. I'he 

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

 The ends of the zygapophyses are missing. Tiie 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 T/iecodouto- 

 ^aiirus antiquus 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 ram. 

 broad. The inner border of the j)roximal 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 iscliium mark th.ese remains 

 off from the Plateosauridae, and place them among t'ne Tiieco- 

 dontosauridae. They indicate a member of this family 

 smaller tiian any hitherto described from South Africa, and 

 which cannot be exactly identihed with any Euro[)ean 

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

 ' Thecoclontosaurus minor. 



Ttjpe. iS.A.M. Cat. no. 3^51. 



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

 Naude's Nek. 



Horizon. Ked Beds, just below halfway from base. 



