PLATE III. 



PAGE. 



PLATYSOMUS ORBICULARIS, N". and W* 



View of specimen, natural size. 



Fig. 2. PETALODUS CURTUS, N. and W 355 



. 2. View of inner face of specimen, natural size. 



2 a. Section of the same 



Fig. 3. CLADODUS DEFLEXUS, N. and W 355 



3. Anterior face, natural Aze. 



3 a. Ou line of base seen from below. 



Fig. 4. PALAIONISCUS GRACILIS, N. and W 847 



View of specimen, natural size. 

 Fig. 5. DELTODUS COMPLANATUS, N. and W., vol ii, p. 98. 



5. View of upper surface of a much worn specimen, natural size. 



8. Basal portion of a larger individual, also much worn. 



Fig. 6. PETRODUS ? PUSTULOSUS, N. and W 369 



Upper surface of a small specimen. 

 Fig. 7. DELTODUS ANGUSTUS, N. and W 368 



View of specimen, natural tuze, and enlargement showing the character of 



the surface punctation. 

 Fig. 9. RHIZODUS RETICULATUS, N. and W 349 



9. View of a scale of very small size. 



13. View of a very large specimen. 



14. A specimen of medium size; all natural size. 



Fig. 10. COCHLIODUS COSTATUS, N. and W 364 



10. "Third " tooth, showing crown surface. 



12. " Second " tooth. 



12 a. The same, seen from above. 



Fig. 11. DELTODUS SPATULATUS, N. and W., vol. ii, p. 100. 



An imperfect specimen of medium size, seen from above. 

 Fi<>- 15. HELODUS COMPRESSUS. N. and W .. 360 



O 



15. Posterior face of tooth, natural size. 



15 a. Profile of the same. 



Fig. 16. POLYRHIZODUS TUUNCAius, N. and W 3S7 



16. Posterior face, natural size. 



16 a. Section of the same. 



Fig. 17. DELTODUS FASCIATUS, N. and W 366 



View of upper surface of tooth, natural size. 

 Fig. 1 8. ORODCS CORRUGATUS, N. and W , 358 



18. View of a series of teeth, natural size. 



18 a. Profile of the game. 



* The description of this species was unfortunately overlooked. 



