PLATE XI. 



surface 107 Wlr £i»»~L? 



Pio- 1 Psammodus porosus? Upper 



J. 1 D . A. 



1 a. Side view. 



1 b. End view in outline. 



Fig. 2. Psammodus angularis. Upper surface 107 



2 a. Side view. 



Fio-. 3. Psammodus rugosus? Upper surface of small tooth 108 o/f- <\ 



3 a. Side view. ^ jj 



Fig. 4. Psammodus semi-cylindricus. Upper surface 109 Ju 



4 a. Profile. /If 



Fig. 5. Psammodus reticulata. Upper surface 109 



5 a. Profile. 1 

 Fig. 6. Psammodus? rhomboideus. Upper surface HO 



6 a. Side view. ,•) Kt*ft> 

 Fig. 7. Trigonodus minor. Upper surface H 2 



7 <z. Side view. ft 



Fig. 8. Trigonodus major. Upper surface 



9. Opposite tooth, ditto. 



9 a. Side view. 



