EXPLANATION OF PLATE XXXVIII. 



Restorations of crania of three species of Pythonomorpha, viewed. from above, one-third natural size: 

 Pmx., premaxillary bone; Mx., maxillary; Prf., prefrontal; Fr., frontal; Pof., postfrontal; Pa., 

 parietal; Pro., prootic ; Exo., exoccipital; Ojjo., opisthotic; Sq., squamosal. 



Fig. 1. Platccarpus curtirostris. 

 3. Clidastes tortor. 

 3. Clidaitts stenops, parietal region inferential. 



