THE SKULL. 



I I 



-Coce 



FIG. 63. SKULL OF YOUXG WATER-TORTOISE (Emys europcea). (Side view.) 



Osp, supraoccipital, which gives rise to a crest ; Pf, prefrontal, which forms a 

 great part of the anterior boundary of the orbit ; /. point of entrance of the 

 olfactory nerve into the nasal capsnle ; Si, interorbital septum ; HK, horny 

 sheaths of jaws ; Qjg, quadratojugal ; Jit, tympanic membrane ; BP, carti- 

 laginous interval between basioccipital and basisphenoid ; J/ef, mandible. Other 

 letters as before. 



Coec 



FIG. 64. SKULL OF A YOUNG CROCODILE. (Ventral view. ) 



Coce, occipital condyles ; Ob, basioccipital ; Ch, internal nostrils ; Ft, pterygoid 

 Orb, orbit ; PI, palatine ; M, palatine process of maxilla ; Pmx, premaxilla 

 Ts, transverse bone ; Jg, jugal ; Qj, quadratojugal ; Qu, quadrate. 



