DESCRIPTION OF THE PLATES. Vv 
Fig. 19. Rotella minuta. Fig. 26. Dendrophylha ? 
20. Adeorbis planorbularis. 27. Echinus? (From the Collection of 
21. Serpula ornata. J. S. Bowerbank, Esq., F.R.S.) 
22. Cerithium cancellatum. 28. Dendrophyllia ? 
23. Orbis patellatus. 29. Echinus ? 
24. Idmonea Coronopus. 30. Dendrophyllia ? 
25. Stylophora emarciata. 31. Emarginula obtusa. 
Tas. X. 
Fig. 1 & 2. Dental plate of the Myliobates Dixoni. 
3, 4 & 5. Dental plate of the Myliobates toliapicus. 
6, 7 & 8. Dental plate of the Aitobates irregularis. 
10. Base of the serrated spme of a Myliobates. 
11 & 12. The left lower maxillary bone and teeth of Elasmodus Hunteri. 
13. Periodus Koenigu. 
14-17. Portions of the prolonged premaxillaries or ‘sword’ of a Xiphioid fish (Ceelorbyn- 
chus). 
18. The upper maxillaries and teeth of Edaphodon eurygnathus. 
19, The right premaxillary of Edaphodon eurygnathus. 
20. The right upper maxillary of Edaphodon Bucklandi. 
. The inner side view of Edaphodon Bucklandi. 
woe 
. A fragment of a Chimeroid tooth. 
. Platylemus Colei. 
4-27. Vertebree of Fossil Fishes. 
28-31. Teeth of Lamna elegans. 
32-35. Teeth of Otodus obliquus. 
Se 
oo 
Tas. XI. 
Fig. 1. Part of the lower dental plate of a recent Sting-ray, Myliobates. 
2-4. Aitobates irregularis. 
convexus. 
6 subconvexus. 
7. A single tooth of AXtobates. 
8. AStobates rectus. 
9. Lower jaw and teeth of a recent Aitobates. 
10. Section of upper and lower jaw of ‘Xtobates. 
11-18. Defensive spines of a Siluroid fish. 
14, Myliobates Dixoni. 
155. irregularis. 
16. —— Edwardsi. 
