Specimens of South African Fossil Beptiles. 25 
The jaw fragment with teeth seems to me to be entirely distinct and 
to have nothing whatever to do with Anthodon. The teeth have admittedly- 
some superficial resemblance to those of Anthodon, but are really very 
different. In Anthodon, as in other Pareiasaurians, the cusps are sub- 
equal and the outer side of the tooth is apparently fairly uniformly 
rounded. In the teeth of the Bushman's Eiver specimen the central cusp 
is much the larger and there is a very large basal thickening. The 
manner in which the teeth are being replaced is also unlike that of the 
Pareiasaurians. From the Bushman Eiver beds being Cretaceous it may 
be regarded as practically impossible that the teeth can be those of a 
Pareiasaurian, as there is no evidence that any Pareiasaurian survived 
the Permian. But when we compare the teeth with those of Cretaceous 
reptiles of other parts we find that they are strikingly similar to those of 
some herbivorous Dinosaurs. The teeth of Stegosaurus are not unlike 
the Bushman Eiver teeth, but those of Falceoscincus costatus agree so 
closely as to render it highly probable that the African teeth belong to 
this genus. I therefore think it advisable provisionally to name the 
Bushman Eiver specimen Palceoscincus africamts. They are manifestly 
not Anthodon serrarius and pretty certainly Dinosaurian. 
Saueosternon. 
Saiirosternon haini is represented in the British Museum by two 
specimens, neither of which is very satisfactory, and hence little has been 
known with certainty as to the affinities of the genus. On examining the 
type I was able to recognise distinctly a precoracoid and coracoid of a 
type very similar to that of Procolophon, and though the head is not well 
preserved, it agrees, so far as can be seen, closely with Procolophon. There 
is therefore, I think, little doubt that Saiirosternon must be placed with 
Telerpeton in the Procolophonia. 
The horizon of Saiirosternon probably extend from the Endothiodon 
beds to the Lystrosaurus beds, though it is very doubtful if the same 
species is found in each bed. 
