Soittli African Fossil Reptiles and Amphibia. 



a median vomer on the palate separated by sutures from the 

 pterygoids is equally uncertain, and the structure of that region 

 must remain doubtful. The bone is cracked in a rather sym- 

 metrical manner, which increases the difficulty of determining 

 sutures. 



n 



c. 



UT Pr VAC 



AKIDNOGNATHUS PARVUS n.g. et n. sp. 

 FIG. 52a. Section across skull just behind internal nares. 

 FIG. 52b. Cross-section at middle of interpterygoid vacuity. 

 FIG. 52c. Section across basisphenoid at front of keel. 

 FIG. 52d. Section across prevomers near anterior end. 



As mentioned, the prevomers are separated by a definite suture 

 posteriorly ; but anteriorly the suture becomes obliterated, and 

 the bones broaden out and become thinner. A section across 

 the front of the bone shows them forming a single median septum, 

 thin below, but broadening dorsally to form a grooved upper 

 surface. The palatal portion of the bone is thin and concave 

 dorsally, as in Ictidognathus parvidens. In the upper part of the 

 median septum there is a small canal. 



