594 Du. R. BROOM ON A SOUTH AFRICAN [May 29, 



imperfect or insufficiently displayed, or the determination too 

 uncertain to warrant description. 



A portion of the nasal presei-ved shows that the bone was of 

 considerable size, as in Palceohatteria. 



I n specimen A a number of bones of the palate are preserved. 

 Though these are imperfect, yet as the pterygoids are fairly 

 com plete it is possible to make an approximate restoration of the 

 palate. 



The pterygoids are of the triradiate type found in most early 

 reptiles, such as Dimetrodon, Proterosuchus, Procolophon, &c., and, 

 as in these genera, are dentigei'ous. The anterior process is 

 long and narrow, and along apparently its whole leng-th is a 

 single row of small teeth, which must lie almost parallel with 

 the corresponding row on the pterygoid of the opposite side. The 

 posterior half of the anterior process is about twice as broad as 

 the anterior, and on it is a second dental ridge with at least two 

 rows of faii'ly well-developed teeth passing forwards and slightly 

 outwards from near the back end of the inner dental ridge. The 

 anterior ridge articulates by much of its outer side with the 

 palatine. From the posterior part of the toothed portion of the 

 bone the median process passes outwards and slightly forwards. 

 It appears to be devoid of teeth. From about the same point the 

 posterior process is sent backwards and outwards, doubtless to 

 meet the quadrate. This process is broad, fan-shaped, and concave, 

 and recalls rathei- forcibly the posterior pi'ocess of the pterygoid 

 in ProGolophon and Dimetrodon. 



The palatine is very imperfect, but it appears to be moderately 

 fiat and devoid of teeth. 



A considerable poition of each mandible is preserved, but not 

 in a very satisfactory condition. The dentaiy carries four rows 

 of small obtusely pointed teeth almost exactly similar to those of 

 the maxilla. Unfortunately, only the back part of one dentary 

 is preserved, and the cast of the back part of the other. The 

 preserved portion is 4 mm. wide. The post-dentary portion of 

 the jaw has a swollen appearance, recalling that of Proeolophon, 

 but it is much larger in Hoivesia. The bone which forms the 

 greater part of the outer side I believe to be the surangular. In 

 situation it quite agrees with the supposed surangular in Proco- 

 lophon, but in the latter genus it is much smaller. In Protero- 

 suchus the surangular is also of very large size. There appears to 

 be a small but distinct coronoid bone. The angular seems to form 

 nearly the whole of the lower border of the posterior two- thirds 

 of the jaw. In the middle of the jaw there is a very lai'ge cavity 

 as in Procolophon. 



Lying on the pterygoids were two long, i-ounded, slightly 

 curved rods of bone at least 22 mm. in length. These ai-e 

 probably hyoid bones. 



Vertehrce. 



Though portions of many cervical and caudal vertebrse are pre- 

 served as well as parts of a few others, they are for the most part not 



