Fauna and Stratigraphy of the Stormberg Series. 427 



the front to the hack and from the transverse process down to within 

 35 mm. of the ventral surface. The upper surface of the transverse 

 process is Hat and horizontal, the process passing outwards and hack- 

 wards. The posterior zygapophysis is short; its under surface is 

 concave facing outwards and downwards. The base of the neural 

 spine is 100 mm. long and not more than 25 mm. wide. The width 

 between the tips of the transverse processes was probably 290 mm. 



Ischium. Both ischia are present, lacking only the subacetabular 

 expansions. 



The greatest length of the bone is 570 mm. Ventrally the two 

 bones were probably in contact throughout their length ; dorsally 

 the distal ends have a straight contact for 250 mm. and then diverge 

 gradually. Just above the point of contact on the posterior side the 

 shaft has a breadth of 50 mm. ; at the distal end it broadens out to 

 100 mm. The shaft is flat posteriorly, while its outer and anterior 

 borders are concave. The most characteristic feature of the bone is 

 the very pronounced thickening at the distal end a thickening 

 greater than that seen in any other known Plateosaur. Whereas at 

 its narrowest the bone has a thickness of only 40 mm., just above 

 the distal end it swells to a thickness of 140 mm. and a breadth of 

 100 mm. 



The distance between the inner sides of the proximal ends of the two 

 bones is 140 mm. The medial face of the proximal portion is concave, 

 the lateral face convex. The greatest breadth across the iliac articular 

 surface is 110 mm. The groove on the hinder face of the bone is 

 about 150 mm. long and is well-marked. 



Type. Sacral vertebrae, ischia. (S. Af. Mus. Cat. No. 3608.) 



Locality. Kromme Spruit, Herschel, C. P. 



Horizon. Base of Red Beds. 



GIGANTOSCELUS MOLENGRAAFFi, van Hoepen. 



1916. van Hoepen. Verhand. Geol.-Mijn. Genoot. Ned. en Kolonien. 

 Geol. Serie III, p. 107, text fig. 3. 



Founded on the distal end of a right femur. The bone is some- 

 what larger than that of EuskeUsaurus, but is relatively thicker and 

 has a narrower sulcus between the two distal condyles. The chief 

 interest of the specimen lies in the fact that it is of a type that occurs 

 apparently only near the base of the Red Beds in the Cape Province. 



Type. Distal end of a femur in the Transvaal Museum. 



Locality. Haakdoornbult, 344. Waterberg Dist., Transvaal. 



Horizon. Bushveld Sandstone. 



