from (lie Middle Purhech of Swanaf/e. 



487 



maxillae (tux.) bear numerous tectli, the edges of the sockets 

 for which form slight promiiu'iices on the alveolar bordei'. 

 Tlie teeth themselves have sharp, pointed, slightly curved 

 crowns, which are circular in section ; the enamel is raised 

 into numerous well-defined vertical ridges, but there seems to 

 have been no carina. About nine teeth occur in a length of 

 10 cm. of the alveolar border. 



The palate (text-fig. 1) is badly preserved. It can be seen 

 that the pterygoids {pt.) united beneath the basisphenoid 

 and send forwards and outwards broad wings whicli unite 

 externally with the transpalatine (<•/>), an L-shaped bone, 



Fijr. 1. 



Pholidosaurus decipicns, AVatson. Diagram of the palate. 

 About \ uat. size. 



cond., occipital condyle ; eu.m., median Eustachian opening ; i.nar,, in- 

 ternal nares ; j., jugal; pal., palatine j i)t., pterygoid; s.o.v., sub- 

 orbital vacuity ; t.p., transpalatine. 



the outer end of which joins the maxilla and probably the 

 jugal {j.). Anteriorly the pterygoids appear to unite with 

 the paUitines (pal.) at about the level of the anterior ano-le 

 of the internal nares {i.nar.). These openings seem to be 

 bounded below by the palatines only, thougli tlie pterygoids 

 must form most of their roof; their anterior angle is about 

 as far forward as the anterior border of the temporal fossa. 

 The suborbital vacuities (s.o.w.) are large, their posterior 

 angle extending some distance behind the anterior border of 

 the narial opening. The median Eustachian opening (eu.m.) 



