THE SKULL. 



-Cocc 



FIG. 63. SKULL OF YOUNG WATEII-TOUTOISE (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 ; -/T^point of entrance of the 

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

 sheaths of jaws; Qjg, quadratojugal 1 ; Mt, tympanic membrane; BP, carti- 

 laginous interval between basioccipital and basisphenoid ; Md, mandible. Other 

 letters as before. . 



Coec 



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



Coco, occipital condyles ; Ob, basioccipital ; Ch, internal nostrils ; Pt, pterygoid 

 Orb, orbit ; PI, palatine ; .)/, palatine process of maxilla ; Pmx, premaxilla 

 2 T 6', transverse bofio ; J<t, jugal ; Qj, quadratojugal ; Qu, quadrate. 



