PELYOOSAURIA 



PLATE 27 



FI9 12 



FI9. 13 



Figs. 1 to 5 and 7, Diraetiodon navajovicus. Figs. 8 and 9, Tomicosaurus. 



Fig. 6, Dimettodon incisivus. Fig. 10, Embolophorus fritillus. 



Figs. 1 1 to 1 4, Dimettodon sp. 



