Fig. 001.— Lateral view of skull of Emys europaca. Core, fjccipital condyle ; /•". frontal 

 F\. postfvontal ; /, foramen by wliicli the i.lfaetury nerve enters the orbit; /".''. jugal 

 M. maxilla ; Md. mandilile ; ilt. tymiianie niembraiie ; Na. external nares ; 01. exoccipital 

 0<p. suiiira-oceipital ; /'. parietal; PJ. pre-frontal ; Pni): pre-maxilla ; Qjg. qnadrato- jugal 

 (^11. ([iiadrate ; Si. inter-orbital septum ; Sqii,. squamosal ; Vo. vomer. (From Wiedersheini's 

 Coiiiparatire Aixttoiwj.) 



/" 



Fig. 09:i. — Ventral view of the skull of Chelone mydas.-bs.'basi-sphenoid ; fr. frontal ; ;. jugal ; 

 ra. maxilla ,ob. hasioccipital :ol. exoceipital ; op. oijLsthotic ; ost. supraoccipital ; -pal. palatine ; 

 par. parietal ; ph, post-frontal ; prfr. prefrontal ; pt. pterygoid ; prm. premaxilla ; ci. quadrate ; 

 qj. quadrato-jugal ; .s'j. squamosal ; v. vomer. (After Hoffmann ) 



