296 



ZOOLOGY 



SECT. 



floor of the most posterior portion of the cranial cavity ; posteriorly 

 it bears a rounded prominence, the occipital condyle (oc. cond). 



A pmsc 



eocl.nar ^f ' >, e,x>l.na,r 



\ 9, 



trans 



FIG. 907. Skull of Iiacerta agrilis. A, from above ; B, from below ; C, from the side. 

 any. angular ; art. articular ; bas. oc. basi-occipital ; bas. ptg. basi-pterygoid processes ; bas. 

 #ph. basi-sphenoid ; col. epi-pterygoid ; cor. coronary ; dent, dentary ; eth. ethmoid ; ex. oc. ex- 

 occipital ; ext. nar. external nares ; for. mag. foramen magnum ;//. frontal ; int. nar. internal 

 nares ; jj. jugal ; Icr. lacrymal ; max. maxilla ; nas. nasal ; oc. cond. occipital condyle ; off. 

 olfactory capsule ; op. ot. opisthotic ; opt. n. optic nerve ; pal. palatine ; par. parietal ; para. 

 parasphenoid ; par. f. parietal foramen ; p. mx. pre-maxillae ; pr. fr. pre-frontal ; p%/. 

 pterygoid ; pt. orb. post orbital ; qu, quadrate ; s. any. supra-angular ; s. orb. supra-orbitals ; 

 sq. squamosal; supra fl. supra-temporal 1; supra V*. supra-temporal 2; trans, transverse; 

 supra, oc. supra-occipital ; vom. vomer. (After W. K. Parker.) 



In front of it, forming the middle portion of the floor of the cranial 

 cavity, is the basi-sphenoid (bas. sph), not represented in the Frog, 

 in front of which again is a membrane bone, the parasphenoid 



