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Annals of the South African Muse inn. 



surface slopes downwards, gradually being rounded oft" into the 

 posterior face of the bone. The inner edge of the proximal surface 

 is evenly rounded; on the anterior half of the outer edge there is 

 a prominent lateral condyle from which a short, prominent ridge 

 passes down on to the shaft. This condyle lies well below the level 

 of the head of the bone. At the distal end there is a differentiation 

 into two processes, one of which lies higher than the other, as in 

 the Triassic Saurischia; but the step from one to the other is not 

 so deep as in, say, Thecodontosaurus. 



Fig. 16. Sphenosuchus acutus, Htn. 



A. Inner view of left humerus. 



B. Outer view of right humerus. 



Both figures X \. 



The distal portion of the fibula shows the bone to have been more 

 slender than the tibia. The distal end is slightly expanded. The bone 

 is oval in cross-section. 



Type. Skull and part of lower jaw with bones of the shoulder 

 girdle, part of fore limbs, and part of hind limb, with vertebrae and 

 rib fragments. (S.A.Mus. Cat. No. 3014.) 



Locality. Paballong, Mount Fletcher, Cape Colony. 



Horizon. Red Beds. 



Affinities. In the general form of the skull Sphenosuchus agrees 

 with most of the members of the super-order Archosauria, i.e. in 

 the possession of supra-, infra-, and post-temporal arcades and vacuities. 



