﻿Fig. 2. — Sections of the nasal canals tahen at the 

 points marJced on the palatines in Jig. 1 

 (jp. 352) as numhered. (Natural size.) 





[The vomerine element is left blank ; the palatines are 

 shaded ; and the pterygoids are shown black.] 



palatines and vomers 

 only, and the greater 

 part of the latter 

 lies posteriorly. Be- 

 hind this junction 

 with the prsefrontals 

 the exterior half of 

 the palatines be- 

 comes flatter, and 

 the outer walls thin- 

 ner, overlapping the 

 vomers (fig. 2, 3 & 4) 

 until at 80 milli- 

 metres from their 

 posterior end they 

 diverge towards the 

 outer posterior rami 

 into which they 

 merge. 



Vomers. — So far 

 I have referred to 

 these bones in the 

 plural, as in all rep- 

 tiles they are paired ; 

 but in the present 

 instance I have great 

 hesitation in stating 

 such to be the case, 

 as I can find no trace 

 of a suture through- 

 out the whole length 

 of the bony por- 

 tion which consti- 

 tutes the vomerine 

 element. I have 

 also examined the 

 same portion in 

 several specimens of 

 M. superciliosus in 

 the Eyebury collec- 

 tion, one of which 

 is probably a fairly- 

 young individual, 

 and the same pe- 

 culiar absence of any 

 trace of a suture is 

 to be noticed. It 

 is, of course, highly 

 probable that there 



