324 Annals of the South African Museum. 



These posterior processes are well differentiated from the transverse 

 processes, and pass outwards and slightly backwards. From the 

 posterior edge of each articular surface there passes inwards and 

 slightly downwards a bony ridge, which, with the upper edge of the 

 zygapophyses demarcates a bony lozenge-shaped slightly concave 

 surface on the back of the vertebra. The lower angle of the bony 

 ridge forms the roof of part of the spinal canal, but there is no 

 hyposphene. The transverse process is well developed and has a 

 moderately large articulation for the single-headed rib. On the 

 front of the process is the anterior zygapophysis, from which there 

 runs inwards and slightly downwards a bony ridge as on the posterior 

 side of the vertebra, but here the ridges do not meet. The vertebra 

 of Propappus rogcrsi differs from that of P. omocratus in that the 

 greater part of the centrum lies below a line joining the two costal 

 articulations. 



The lower dorsal vertebra, which I think may be the 19th, 

 measures in height 162 mm., and in width across the transverse 

 processes 156 mm. The spine is 35 mm. in height. The posterior 

 aspect of this vertebra much resembles that of the other, but the 

 large lozenge-shaped surface is flatter and is divided by a median 

 low ridge. The transverse process is very massive, and the articular 

 surface for the rib much broader and shorter than in the more 

 anterior dorsals. The articular surface of the body is nearly normal, 

 measuring 63 mm. in both diameters. The length of the body is 

 about 50 mm. 



Shoulder Girdle. 



The upper half of the scapula is missing, but the lower part of the 

 girdle is well preserved. It resembles closely the shoulder girdle of 

 Pareiasaurus serridens, differing only a little in the proportion of 

 certain parts and in the shape of the acrornion. The sutures are 

 almost completely obliterated, but there seems little doubt that the 

 usual elements scapula, coracoid, and precoracoid are present. 



The scapula has a broad lower end, which articulates with or 

 rather is anchylosed to the coracoid and precoracoid. It probably 

 forms about half of the glenoid cavity, and the articular surface is 

 divided into a large posterior part and a small anterior, which looks 

 more directly outwards and downwards. Below the anterior edge of 

 the glenoid cavity lies the large precoracoid foramen, which passes 

 almost directly upwards, forming a deep groove on the inner side of 

 the scapula. The preglenoid portion of the base of the scapula 

 is about the same size as the glenoid, in this differing from the 



