PLATE 40 



Figs. I, 2, 3. Ptyctodiis sp. Three tritors in profile view, to show progressive 

 wearing down with use. 



1, E 2407; natural size. 



2, E 1926 (2); X f, p. 114. 



3, E 1926; natural size, p. 114. 



Fig. 4. PalcBomyliis sp. Small dental plate (juvenile?), in inner view; natural 

 size. E 2448, p. 123. 



Fig. 5. Anterior portion of dental plate, inner view; natural size. E 2449, 

 p. 123. 



Fig. 6. Palaomylus lunaformis, n. sp. Type. Dental plate, natural size. E 

 1928, p. 119, 



278 



