THE PHYTOSAURIA OF THE TRIAS 



151 



(Mystriosuchus) plieningeri or Lopho pros pus {Belodon kapffi). In 

 these two latter forms, according to F. von Huene/ the length is 

 290 mm. and 280 mm. respectively. The end of the mandible 

 swells rapidly at a point about 51 mm. from the tip into a disklike 

 expansion with a width of some 68 mm. This terminal expansion 



Figs. 8-16. — Phytosaurian teeth, presumably from the genus Angistorhinus . 

 Figs. 8 and 10, teeth of the anterior terminal expansion of the lower jaw? Fig. 9, 

 probably one of the anterior premaxillary teeth. Figs. 11, 14, 15 and 16, posterior 

 maxiUary teeth? Fig. 12, probably one of the anterior premaxillary teeth. Fig. 13, 

 root and part of crown of one of the posterior teeth, showing the sudden transition 

 from round to compressed section. All a little under natural size. 



' Op. cit., p. 27. 



