550 



LACERTAE 



CHAP. 



the skull. The latter -is always well marked off from the neck. 

 The postorbital arch is complete. The temporal region is com- 

 pletely roofed over by bones dorsally, chiefly owing to the size of 



Fig. 142. — Skull aud lower jaw of Laccrtd riridis. A, Dorsal view ; B, ventral view ; 

 C, from the left side ; D, right half of the lower jaw, from the inner side, with some 

 of the pleurodont teetli. Ji.P, Ectopterygoid ; /', Fr, frontal ; ,/«y, jugal ; Lac, 

 lacrymal ; Max, maxillary ; N, Na, nasal ; N^, in B, inner narial opening ; Pal, 

 palatine ; Par, jiarietal ; Pmx, premaxillary ; Pr.f, prefrontal ; Pt.f, postorbital : 

 Pt.f^, postfrontal ; Ptij, pterygoid ; Q, quadrate ; S.ang, supra-angular ; S<], squa- 

 mosal ; Vo, vomer. 



the postfrontal (Fig. 142, ^^^f/o), which fills the space between the 

 parietal and the squamoso-postorbital bridge, thus abolishing the 

 supra- temporal fossa. The squamosal is very small, placed be- 



