310 



In a third younger Phascolomys vombatus (fig. 2) the lateral margins converge more 

 gradually and in an almost straight line from the base to the anterior fourth of the 



35" 



Xasal bones and their connexions, P/uiscolomys platyrhinus, Ow. 



nasals, where the margins extend nearly straight to the nostril. The middle sixth 

 part of the fronto-nasal suture is slightly concave ; the rest extends outward and more 

 obliquely forward than in the two preceding specimens. The apices of the nasals 

 projecting beyond the premaxillo-nasal sutures are sharp, and form one fifth the length 



