PLATE XXIII. 



i'ig. 



o. 



Tomistoma africanum, Andrews ; mandible from above, (1 a) inner side of 

 posterior portion of left ramus, (1 b) outer side of posterior portion of 

 right ramus : one-fourth nat. size. Qasr-el-Sagha beds (Middle Eocene). 



[Type specimen, C. 10006.] 



Ditto ; cervical vertebra, from side and (2 a) from back : one-half nat. size. 

 Same horizon. [R. 3332.] 



Tomistoma gavialoides, Andrews ; skull, occipital and (3 a) upper surfaces : 

 one-fourth nat. size. Fluvio-marine beds (Upper Eocene). 



[Type specimen, C. 8948.] 



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270 



273 



267 



ang., angular. 

 art., articular. 

 hoc, basioccipital. 

 c.f., facet for head of rib. 

 cond., occipital condyle. 

 dent., dentary. 

 exo., exoccipital. 



/., frontal. 

 hyp., hypapophysis. 

 mx., maxilla. 



n.sp., neural spine. 



orb., orbit. 



])a., parietal. 

 jpmx., premaxilla. 

 pr.f., prefrontal. 



q., quadrate. 

 s.ang., surangular. 



soc, supraoccipital. 



spl., splenial. 

 s.t.f., supratemporal fossa. 



t.f., facet for tubercle of rib. 



