ID, 991. — Lateral view of skull of Emys europ^a. Cocc. occipital condyle; F. frontal; 

 P^. postfrontal ; /, foramen by which the olfactory nerve eiiters the orbit; lug. jugal ; 

 M. maxilla ; Md. mandible ; Mt. tympanic membrane ; Na. external nares ; 01. exoccipital ; 

 O&p. supra-occipital; P. parietal; PJ. pre-frontal; Pnix. pre-rhaxilla ; Qjg. quadrato-jugal ; 

 Qu. quadrate ; Si. inter-orbital septum ; Squ. squamosal ; Vo. vomer. (From Wiedersheim's 

 Comparative Anatomy.') 



j^rfr. 



prm 



Fig. 992.— Ventral view of the skull of Cbelone inydaB.--&fi.'basi-sphenoid ; fr. frontal ; ^'. jugal ; 

 m. Tuaxilla , o&. basioccipital ; ol. exoccipital ; o^. opisthotic ; os. supraoccipital ; paZ. palatire ; 

 VO.r. parietal ; 'ph. post-frontal ; prfr. prefrontal ; -pt. pterygoid ; )»^)i. premaxilla ; q. quadrate ; 

 ©'.quadrato-jugal; sq. squamosal; v. vomer. (After Hoffmann.) 



