88 



Mr. D. M. S. Watson on Pleurosauvus and 



surface of the squamosal, overlapping its upper border so as 

 to meet the parietal ; its body is in contact with the head 

 of the quadrate, and it sends a long process forward, which 

 lies below and within the jugal. In some lizards the post- 

 orbital passes backward along the upper edge of the jugal 

 to meet this bone. 



Fig. 2. 



R.OC 



QuJ. 



B 



Par.Oc. 



A. Eight squamosal of Endothiodon from behind. 



B. Right squamosal of Sphenodon from behind. 



C. Right squamosal of Uromastix from behind. 



Pi\E., facet for parietal ; Pab.Oc, facet for paroccipital ; Qu., facet for 

 quadrate ; Qu.J., facet for quadrato-jugal : S.Oc, facet for supra- 

 occipital. 



The lateral bone resembles 

 following features : — 



a quadrato-jugal in the 



1st. It lies outside the squamosal. 



2nd. It connects the quadrate with the jugal. 



3rd. Its mode of articulation with the jugal is identical 



with that of the undoubted quadrato-jugal of 



Sphenodon. 



