D. M. S. Watson— The Beaufort Beds, S. Africa. 207 



District Tarka ; Fernvocks, near Tafelberg Station, District ]\Iiddel- 

 burg ; Klip Kuil, District Albert; and at a locality on the Orange 

 Kiver a few miles west of Aliwal North. It also occurs in the 

 Orange Free State. These localities fix the line with some accuracy 

 and give the bottom of the Cynognatlms zone, the upper limit of 

 which is the bottom of the Molteuo Beds, wliose outcrop has been 

 partly mapped by the Survey and is obvious from their marked 

 lithological characters. The field evidence seems to show that the 

 upper part of the Great Winterberg is composed of Molteno Beds 

 formerly continuous with those of Tafelberg. The area of Cynognathus 

 beds north-west of Graaf Keinet depends on the type-specimen of 

 Cynochampsa laniaria, Owen, from Rhenosterberg. This specimen 

 is quite certainly a Cynognathid, almost certainly a Diademodon. 

 The most northerly Cynognathus zone locality which I know is 

 Smithfield, from which the British Museum has Mrythro&ucJms. 



The distribution of the Lystrosaurus zone is well fixed by the 

 occurrences at Klip Kuil, Colesberg, round Middelburg, and 

 I^ewtondale in Tarka. North of Fort Beaufort its distribution on 

 the map depends on a thick mass of light-yellow sandstone whicli 

 I believe to belong to this zone. Large Dicynodons indicating the 

 CisticephaJus zone are found at many localities round Fort Beanfort. 

 The occurrence of the type- specimen of Pariasaurus at Blinkwater 

 suggests the occurrence of the zone of that name, but specimens in 

 the British Museum which I have strong reasons for believing to 

 belong to that type-specimen are of a type which would now be 

 called Propappus, a typical Cisticephalus zone form. 



The occurrence of the type-specimen of Gorgonops torvus at 

 "Mildenhalls", which is prohably the farm now owned by the family 

 of that name a few miles south of Fort Beaufort, shows definitely 

 the occurrence of the jEndothiodon zone, for another and absolutely 

 identical individual has been found in the zone at Beaufort "West. 

 The small Endothiodonts found at East London suggest the same 

 horizon, though tliey might be of Cisticephalus age. 



The Cisticephalus locality north of Bedford is on the Kagaberg, 

 where Dicy?iodofi tigriceps occurs, that near Aberdeen depends on the 

 type-specimen of Platypodosaurus rohustus, Owen, from Camdebo. 

 Large Dicynodons probably of this horizon in the Bloemfontein 

 Museum come from the Modder River about 20 miles east of that 

 town. Similar but very fragmentary remains have been obtained at 

 Senekal and Harrismith. 



The typical large lightly armoured Pariasaurs of the zone of that 

 name have never been found except in the Gouph. The Deinocephalian 

 Moscops comes from Dams Laagte, south of Sutherland. As the 

 large bones of these reptiles Avhen weathered out are only very 

 slowly destroyed and are very conspicuous objects, the fact that they 

 have never been found elsewhere gives good reason for believing that 

 this zone either does not occur out of tliis district or, much less 

 probably, is not fossiliferous. 



The map constructed in this way from many more localities than 

 tliose actually marked is self-consistent, and I think does make an 

 approximation to the real general distribution of these zones in 



