506 



lx of the South African 



exit of the nerves. The basioccipital is somewhat thicker than in 

 Sci/mnognatfiH* wlmitxi and the floor of the cerebellum rises more 

 abruptly. The pro-otic has a long upper process which appears to 

 form a transverse plate forming the anterior wall of the cerebellum. 

 Superiorly on the side-wall of the brain-ease, the pro-otic articulates 

 with what seems to be a distinct epiotic. Just below its upper sur- 



Fig. 4. Gorgonognathvs longifrons, Hgn. 



a. Lateral view of type skull. 



b. Palatal view of type skull. 



c. Dorsal view of type skull. 



face the pro-otic is pierced by a large oval foramen whose longer 

 axis lies vertically. 



The median part of the palate is deeply vaulted. The ridges form- 

 ing the boundaries of this vaulted area converge posteriorly, and 

 are the inner edges of swollen portions of the pterygoids and pala- 

 tines, which carry a few teeth. Lateral to these swellings the palate 



