160 



Family V. VARANID^E. 



Skull with incomplete postorbital and complete postfronto-squa- 

 mosal bony arches ; supratemporal fossa not roofed over ; pne- 

 maxillary single, narro\\'ed and much produced posteriorly; nasals 

 coalesced, narrow ; parietal single ; infraorbital vacuity bounded by 

 the pterygoid, palatine, and transverse (transpalatine) bones, the 

 maxillary being excluded ; frontals completely surrounding the 

 olfactory lobes of the brain ; a fibre-cartilaginous interorbital 

 septum ; a columella cranii. Teeth large, dilated at the base, which 



pm 



2) C 



Fig. 48. Skull of J r aramis griseus. 



A. Side view. 



ang. Angular. 

 ar. Articular. 

 bo. Basioccipital. 

 bp. Basisphenoid. 



c. Columella cranii. 

 cr. Coronoid. 



d. Dentary. 

 eo. Exoccipital. 



/. Frontal. 



is. Interorbital septum. 



j. Jugal. 



B. Upper view. 



/. Lachrymal. 

 m. Maxillary. 

 . Nasal. 

 oo. Opisthotic. 

 p. Parietal. 

 pi. Palatine. 

 pm. Prsemaxillary. 

 pro. Prootic. 

 prf. Praefrontal. 

 pt. Pterygoid. 



C. Lower view. 



ptf. Postfrontal. 



q. Quadrate. 

 s.ang. Supra-angular, 

 so. Supraoccipital. 

 sor. Supraorbital. 

 st. Supratemporal. 

 sq. Squamosal. 

 tp. Transpalatine. 

 tu. Turbinal. 

 v. Vomer. 



