270 Transactions of the South African Philosophical Society. 



The pelvis, which is represented by both ilia and portions of both 

 pubes and ischia, is so far as preserved very like the pelvis of 

 Oudenodon. Both ilia are broken across at the constricted portion, 

 but fortunately practically nothing is lost at the seat of fracture on 

 the left side, and the parts can be fitted together. On the right side 

 the fractured surfaces have been much weathered and the bones 

 badly crushed, so that there is a little doubt as to whether the 

 parts have been correctly joined. The ilium is a large bone which 

 terminates above in a long semi-circular crest. The upper portion is 

 fairly flat, but the first half is somewhat concave owing to the 

 anterior part of the ilium being directed outwards. Almost the whole 

 of the upper portion of the ilium is supported by the four large 

 sacral ribs. Posteriorly the upper portion of the ilium ends in a 

 rather sharp process. The middle portion of the ilium is much con- 

 stricted, and on the posterior side there is a very deep notch between 

 the upper flat portion and the low T er articular portion. The aceta- 

 bulum is of large size and closed as in mammals. The lower 

 portion of the ilium forms nearly half of it, and the articular surface 

 of the ilium looks downwards, outwards, and backwards. The pubis 

 is only represented by the upper or acetabular portion, but though 

 broken off a short distance below the acetabulum, enough remains to 

 show that there was a distinct though probably not very large ischio- 

 pubic or obturator foramen. There is also evidence of there having 

 been in front a distinct pectineal process. The ischium, like the 

 pubis, is broken off a little distance below the acetabulum. It is a 

 much larger bone than the pubis. 



The upper and lower portions of both femora are preserved, but 

 unfortunately all the portions are considerably crushed, and it is thus 

 impossible to give a satisfactory description of the bones. On the 

 whole the femur agrees pretty closely with that of Oudenodon. 



The upper ends of both tibiae and of one fibula are preserved. As 

 in Oudenodon, Lystrosaurus, and " Dicranozygoma," the head of 

 the fibula is larger than the head of the tibia. In Endothiodon, 

 as in Lystrosaurus, it is very much longer. The head of the fibula 

 articulates with the side of the head of the tibia and also gives a 

 fairly large articulation to the femur. The heads of both tibiae 

 are crushed and imperfectly displayed. They are about as broad 

 as deep. There is a deep groove for the tibialis anticus muscle, 

 as in Pareiasaurus. 



The following are some of the principal measurements :— 



Snout to back of post- orbital arch 180 mm. 



Width of frontal region Ill 



