G66 



DR. R. BROOM ON THE STRUCTURE OF THE SKULL 



A slightly oblique transverse section through the slaill shows 

 something of the structure of tlio palate. The section is illus- 

 trated in text-fig. ii; it passes from what is the middle nasal 

 region above to near the middle of the deepest part of the ptery- 

 goids, and shows the great size of the pterygoids. Inferiorly 

 they ai'e somewhat parted, but above they unite in forming a 

 very high median crest. On each side a section of the ectoptery- 

 goid is seen, and above this the powterior spurs of the palatines. 

 On one side a considerable portion of tlie maxilla is cut across ; 

 on the other a part of the jugal and a very small part of the 

 maxilla,. 



Owing to the extreme hardness of the matrix, no attempt has 

 been made to clear the palate ; and as in the following type the 

 palate is fully revealed, it seems unnecessary, for doubtless the 

 structure will be very similar in Scapaiiodon to that seen in the 

 other genus. 



DiNOPHONEUS INGENS, gen. et sp. nov. 



This noAV genus and species are founded on two skulls discovered 

 by ]\Tr. M. J. van Wyk on the farm Kookfontein, in the Prince 

 Albert district. Though the two skulls ai^e apparently the same 

 species, to avoid Siwy possible confusion specimen B will be 

 regarded as the type. 



Specimen A consists of a nearly complete skull which has the 



Text-figure 4. 



''iliP^j. 



Side view of skull of JJinopIwneus ivgens, gen. et sp. nov. About i nat. size. 



frontal and parietal regions and part of the occiput beautifully 

 weathered out, but with the lower half of the back of the skull 

 completely enclosed in very hard matrix. Most of the snout is 

 preserved, biit weathered above badly and with the front teeth 

 mostly gone. 'J'he greater part of the left mandible is preserved, . 

 but much of it is in hard matrix. The fiont and back parts of 

 the left mandible are preserved in fairly good condition. Of 

 specimen A there is a fine scapula and, presumably, other skeletal 



