South African Fossil Reptiles and Amphibia. 155 



Museum from Acleiidorp Commonage, Graaff Reinet, C.P., a skull, 

 lower jaw and partial skeleton of an example of this species. The 

 skull is somewhat larger than the type. It is flattened laterally, and 

 the relation of the bones of the top of the skull cannot be accurately 

 determined. But there can be no doubt as to the specific identity of 

 the skull with the type figured by Broom. The species is a readily 

 identifiable one in general appearance. In addition to this specimen 

 we have another skull from Dunedin, Beaufort West even larger 

 than the other and similarly flattened which shows exactly the same 

 features. The orbit is circular, looking almost entirely outwards, and 

 is in the front half of the skull. In the Adeudorp specimen (S.A. 

 Mus. Cat. No. 3714), however, the pineal foramen seems to be nearer 

 the postorbital arch than in the type. Otherwise tlin general pro- 

 portions of the top of the skulls are the same. The postorbital arch is 

 exactly midway along the skull in this specimen, and slightly in 

 advance of the middle line in the Dnnedin skull (S.A. Mus. Cat. 

 No. 2681). 



The importance of the Adendorp specimen lies in the fact that with 

 the skull and lower jaw are a number of associated limb-bones, 

 vertebrae, and portions of the girdles. The postcranial skeleton of the 

 Aiiomodonts is well known in its general features ; but hitherto there 

 has been wanting detailed knowledge concerning the features of the 

 various species, so that it is impossible almost to correlate the many 

 skeletal portions of Dicynodouts found with the known skull types. 

 For example, the bones named by Owen as Platypodosaurus robustus 

 have been variously conjectured to be bones of Eocyclops tnagnus, E. 

 lonyus, and Dicynodon gril!x, but not one of the three types is known 

 from more than the skull, so that the point at issue cannot yet be 

 settled. Hence any light shed upon the subject by the discovery of 

 skeletal remains in connection with skulls is welcome. 



In this specimen the bones are preserved in too hard a matrix to 

 permit of their being very satisfactorily cleaned, and many of them are 

 incomplete, having apparently suffered a certain amount of fracture 

 and rubbing before their final entombment. They agree with the 

 normal type of Dicynodont limbs, and thus their measurements alone 



are given. 



Scapula. The upper border of the left scapula is missing. The 

 bone as preserved has a length of 325 mm. The basal breadth is 

 125 mm. and the minimum breadth of the bone is 80 mm. Superiorly 

 the blade widens. The anterior point of the acromioii process is 

 100 mm. above the base of the bone. At the glenoid cavity the bone 

 is strongly thickened to a thickness of 80 mm. 



