118 ANOMOBONTIA. 



of the Fossil Reptilia of S. Africa/ pis. xxxvi., xxxvii., as 

 Dicynoclon tigriceps ; a small figure being given by Seeley 

 in the < Phil. Trans/ for 1888, p. 107, under the same 

 name. As pointed out on p. 102 of the memoir last cited, 

 the ilium is supported by only a single sacral rib, which 

 is of very large size, and the whole structure of the spe- 

 cimen is essentially the same as in Pariasaurus. The 

 ischium and pubis accord closely with the corresponding 

 bones of the innominate No. 47090 mentioned below 

 under the heading of Propappus, and the position of the 

 pubic foramen is the same in both. The ischia must, 

 however, when entire, have been more produced back- 

 wardly than in the latter. The centra of the sacral and 

 adjacent vertebrae are longer and more compressed later- 

 ally than in the skeleton referred to Pariasaurus bombi- 

 clens ; but the ilium agrees with that of the latter in the 

 presence of a protuberance immediately in advance of the 

 acetabulum, and in the long and narrow form of the 

 preacetabular portion, which has a prominent ridge on 

 the anterior border of the dorsal aspect. This specimen 

 may belong to P. serridens. 



Presented by A. G. Bain, Esq., 1853. 



Genus PROPAPPUS, Seeley \ 



Founded upon the humerus, which, as being of a totally different 

 type from that of the Theriodontia and Dicynodontia, may be re- 

 garded as referable to this group. If the under-mentioned pelvis 

 belong to this form there will be evidence that Propappus is 

 generically distinct from Pariasaurus. 



The under-mentioned pelvis has the ilium wider and more upright 

 than in Pariasaurus, and without such a prominent ridge on the 

 anterior border of the dorsal surface, and no prominence immediately 

 in advance of the acetabulum ; while the ischium was less produced 

 posteriorly. The humerus (like that referred to Pariasaurus) is 

 characterized by the comparatively slight expansion of its extremities, 

 the stoppage of the delto-pectoral crest below the head, the inferior 

 position of the entepicondylar foramen, which pierces the bone 

 obliquely from the posterior to the distal aspect, and the large single 

 condyle for the radius and ulna, above which there is no expanded 

 flange. 



■&' 



1 Proc. Eoy. Soc. vol. xliv. p. 142 (1888). 



