V1 DESCRIPTION OF THE PLATES. 
Fig. 17. Myliobates contractus. 
18. A tooth of the Gavialis Dixoni. 
19. A tooth of the Carcharodon heterodon. 
20 & 21. Two views of a tooth of the Otodus lanceolatus. 
22 & 23. Teeth of the Galeocerdo latidens. 
24 & 25. Teeth of Fossil Fishes. 
26. Prolonged premaxillaries or ‘sword’ of a fossil Sword-fish (Coelorhynchus). 
27. Molar tooth of a Pachydermal quadruped (Lophiodon minimus). 
27a. & 27. Premolar tooth and part of jaw of the same quadruped. 
Tas. XII. 
Fig. 1. Aitobates marginalis. 
2. Myliobates striatus. 
3. —— Dixoni. 
4, —— toliapicus. 
5. The left premaxillary bone of the Edaphodon eurygnathus. 
6 & 7. Teeth of a Saw-fish, Pristis. 
8. Portion of fossil skin of a Placoid fish. 
9 & 10. Pristis contortus. 
11, 12 & 18. Dental plates of Platylemus. 
14. A vertebra of Palzophis typhzeus. 
15. The eighth costal plate of the right side of the carapace of a Soft-Turtle, Trionyx. 
16. A costal plate of the carapace of a Turtle (Chelone). 
17. A neural plate of Chelone. 
18. The head of the humerus of a Chelonian. 
19. The ulna of a Chelone. 
20 & 21. Undetermined fossils. 
Tas. XIII. 
Fig. 1, 2 & 3. Skull of the Chelone convexa. 
4. Skull of Chelone trigoniceps. 
5 & 6. Symphysis of lower jaw of Chelone trigoniceps. 
7. Back margin of mandibular symphysis, Chelone trigoniceps. 
11. Side view of mandibular symphysis, Chelone trigoniceps. 
8 & 10. Part of the symphysis of the lower jaw of the Chelone longiceps. 
9. The mandibular symphysis of a smaller individual of the same species. 
12, 14 & 16. A sacral vertebra of a fossil Trionyx. 
13, 15 & 17. A sacral vertebra of a recent Trionyx. 
