76 



COMPARATIVE ANATOMY 



Cocc 



FIG. 61. SKULL 'OF LIZARD (Lacerta acjilis'}. (Dorsal view.) 





e. , b* 



A B 



FIG. 612, A and B. SKULL OF SNAKE (Tropidonotus natrix). 



/occipital condyle ; Os, and Osp, supraoccipital ; 01, exoocipital ; f_ 

 rifltalis ; Pe, periotic ; P, parietal ; Fp, parietal foramen ; F, frontal jjF 1 , post* 

 frontal ; P, ^iueftQntal ; Eth, ethmoid ; N, nasal ; Na, external nostril ; Pmx, 

 ])remaxilla ; M, maxilla; 0, 0, orbital ring; Bp, basioccipital ; Bs, basi- 

 sphenoid ; Ch, posterior nostrils ; Vo, vonier ; PI, palatine ; Ft, pterygoid ; Ts, 

 transverse bone ; Qt/, quadrate ; Squ, squaiwosal ; Mp, supratemporaTT luff, 

 jugai \'^3rt t articular ; Ag, angular ; SA, supra-angular ; l)t, dentary ; II, optic 

 foramen. 



