318 EXPLANATION OF THE PLATES. 



a. The head. 



b. The thorax. 



c. One of the long setaceous antenna. 



d. The squamous peduncle of the same. 



e. One of the anterior legs, with its didactylous termination. 

 y. The hand-claws, and pincers. 



TABLET XXXIL 



Teeth of various kinds of fishes from the chalk formation, near Lewes. 

 Fig. 1. Tooth of Squalus cornubicus, p. 226. 

 Figs. 2, 3, 5, 6, 9, 11. Teeth of Squalus viustelus, p. 226. 



Figs. 4, 7, 8, 10, 26, 28. zygcBna, p. 227. 



Figs. 12, 14, 15, 16. ^aZm, p. 227. 



Fig. 13. Tooth of an unknown species of Squalus, p. 227. 



Figs. 17, 21, 27. Teeth of an unknown fish, aUied to the genus Diodon, p. 231. 

 Figs. 18, 19, 20, 23, 24, 25, 29. Teeth of fishes allied to the genus Diodon, p. 231. 

 Fig. 22. Tooth of a species of Squalus, p. 227. 



TABLET XXXIII. 



Fig. 1. Tooth of an animal of the Lizard tribe, p. 246. 



Figs. 2, 3, 4. Teeth of Esox Lewesiensis, p. 238. 



Figs. 5, 6. Spines of a species of Balistes, p. 229- 



Fig. 7. Tooth of an unknown fish, p. 228. 



Fig. 8. Tooth resembhng the incisors of Anarhicas lupus. 



Fig. 9. Tooth of a species of Squalus, p. 227. 



Fig. 10. Vertebra of a species of Squalus, p. 225. 



Fig. 11. Part of the valve of a species of Balanus, p. 220. 



Fig. 12. The head of Sahno Lewesiensis, p. 236. 



Fig. 13. A posterior dorsal vertebra of the Fossil Monitor of Maestricht, p. 242. 



TABLET XXXIV. 



Figs. 1. 3. Scales of an unknown fish, p. 237. 



Fig. 2. A scale with its process of attachment, p. 237. 



Fig. 4. Leg of an unknown crustaceous animal, p. 224. 



Fig. 5. Lozenge-shaped scales, p. 237. 



Fig. 6. A detached scale of Salmo Lewesiensis, p. 237. 



Fig. 7. Part of the head of Amia? Lewesiensis, with the tongue remaining in situ, p. 241. 



Fig. 8. A portion of the dorsal fin of a fish, allied to the Balistes, p. 231. 



Fig. 9. Fragment of a claw of Astacus Leachii, flattened by compression, p. 223. 



