TllIASSlO SXlCGOCKritALlANS. 



367 



The siiiiamosal is fairly large. It lies bet.ween the supra- 

 squaniosal ami the quadratojugal, and passes downwards on the 

 anterior wall of the otic nt)tch to meet the pterygoid. 



The qnadratojugal is rather sma.ller than the squamosal. 



The postparietal is a small quadrangular bone. On its outer 

 side lies the tabular, which is produced bjickwards into what, 

 when viewed from above, looks like a little posterior horn. 



Text- figure 3. 



Skull of Lifdckkcrina Inu-lej/i, nat. size. 

 Fill- lottoriii.L;' >ii'<> teNt-tii>-. 1. 



The occiput is not sufiiciently well preserved in aiiy of the 

 specimens to show the sutures, but the genera,! structure can be 

 satisfactorily made out. It differs from that of both J^rachi/ops 

 anil Bothriceps in ha\ing the condyles relatively small, and in 

 their not extending back behind the plane of the upper part of 

 the postparietal s, so that they are not seen when the skull is 

 viewed from above. There is a i-elatively large opening between 

 the exoccipitnl and postparietal on the one hand, and the par- 

 occipital and tabular on the other. 



The palate difiers from that of Bothriceps \i\ having on the 



