Oil tlie Pareiasauriaii genus Propappus. 355 



tion of the radius and ulna, but it is situated slightly more internal 

 in Propappus. The inner condyle is here flatter and its upper part 

 projects more inwards. The outer condyle is probably fairly like 

 that in Pareiasaurns, but it is somewhat imperfect. As in the older 

 genus there is an entepicondylar foramen. The constricted portion 

 of the humerus measures 53 mm. by 42 mm. The proximal end has 

 lost the delto-pectoral ridge, but so far as preserved agrees fairly 

 with Pareiascmrus. The articular end is considerably narrower, and 

 its posterior end is directed a little more inwards. 



Ulna. 



The upper half of the right ulna is preserved. It resembles that 

 of Pareiasaurns except that it is smaller and ratlier more slender. It 

 has a well-developed olecranon process. 



Pelvis. 



A large part of the pelvic girdle is preserved, but not in good con- 

 dition. The greater part of both pubes and ischia are present, but 

 only the acetabular portions of the ilia. The various bones are 

 anchylosed, but the symphysis is probably not united by bone. The 

 remains are unfortunately too imperfect to decide with certainty 

 whether the pelvis, figured by Lydekker as (?) Propappus omocratus, 

 is rightly determined, but it seems probable that the determination 

 is correct. From the lower margin of the acetabulum to the lower 

 part of the symphysis is 130 mm. 



Femue. 



Both femora are well presei'ved, and though they differ a little in 

 appearance there can be no reasonable doubt that they belong to the 

 same species as the British Museum type. Each femur measures 

 about 335 mm., or practically the same as the British Museum 

 specimen. Though in general there is considerable resemblance to 

 the femur of Pareiasaurns, there are a number of points of difference. 

 The head is more distinctly differentiated from the great trochanter, 

 the small trochanter is more prominent, and the shaft much more 

 constricted in Propappus. 



The head of the bone is 75 mm. wide and 117 mm. long, and 

 whereas in Pareiasaurns the articular surface for the head is con- 

 tinued on to the trochanter, here there is a distinct division between 

 the two. The great trochanter is here also directed much more 



