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9. On a New Species of Propappus. By S. H. HAUGHTON, B.A. 



THE pelvis which forms the type of this new species was 

 discovered by me at the drift across the Zak River on the main 

 Beaufort road, on the farm Dunedin, in the division of Beaufort 

 West. In conjunction with it were found a number of vertebrae and 

 ribs, together with some dermal ossicles. 



A large portion of the right innominate is preserved, including the 

 whole of the ilium, the acetabulum, and the anterior portions of 

 the ischium and pubis. The ilium differs considerably in shape from 

 that of any other South African Pareiasaurian. The crest is short, 

 with its anterior part curved outwards in a quarter- circle, in such a 

 manner that there is a marked concavity at the anterior end of 

 the ilium. The straight part of the crest measures 120 mm. in 

 length, while the whole length is about 170 mm. The greatest 

 height of the ilium is 115 mm., while the distance from the top 

 of the acetabulum to the most anterior part of the pelvis is 185 mm. 

 The neck of the ilium is greatly constricted, measuring only 43 mm. 

 in height and 23 mm. in thickness at its narrowest part. 



The acetabulum is distinctly oval in shape, the longer axis lying 

 along the suture between the ilium and the posterior bones, shallow 

 except for the development of the upper iliac and upper ischial 

 border. Its height is 90 mm., and its greatest width 57 mm. More 

 than half the acetabulum is apparently formed by the ilium, about 

 one-sixth by the pubis, and the remainder by the ischium ; but the 

 sutures between the bones can be traced only with difficulty and in 

 part. The acetabulum looks downwards and outwards. 



The ischium displays a shape very different from that of any 

 other Pareiasaurian. In Pareiasuchus there is a well-marked 

 tuberosity at the posterior corner, and there is a smaller one in 

 Pareiasurus serridens ; but in this specimen the tuberosity is a 

 large, thickened process, the anterior border of which is at right 

 angles to the upper border of the ischium. The shape and size 

 of this can best be understood from reference to the figure. The 



