EXPLANATION OF PLATE 1. 
13 
Trilobites. P. 391. 
18. Cestracion Phillippi, Port Jackson Shark, r. (Phil- 
lip.) P.288.* 
18'. Palatal Tooth of Cestracion Phillippi. r. 
19. Tooth of Psammodus, from Derbyshire limestone, f. 
19'. Tooth of Orodus, from Mountain limestone, near 
Bristol, f. 
20. Calymene. f. 
21. Paradoxus, f. 
22. Asaphus. f. 
23. Euomphalus. 
24. Producta. f. 
25. Spirifer. f. 
26. Actinocrinites, 
27. Platycrinites. 
27*. Fucoides circinatus 
sandstone, Sweden. 
28. Caryophyllia. r. 8c f. 
29. Astrea. r. 8c f. 
30. Turbinolia. r. 8c f. 
f. 
f. (Miller, P. 96.) P.417, 
f. (Miller, P. 74.) f 
f. (Ad. B.) From Transition 
Remains in Secondary Strata. 
LAND PLANTS. 
31. Pinus. r. 8c f. 
32. Thuia. r. 8c f. 
33. Cycas circinalis. r. Cycadites. f. 
34. Cycas revoluta. r. Cycadites. f. 
35. Zamia horrida. r. Zamia. f. 
36. Dracaena, r. Allied to Bucklandia and Clathraria. f. 
37. Arborescent Fern. r. P. 465. 
38. Pteris aquilina. r. Pecopteris. f. 
* This shark is the only known living representative of the ex- 
tinct genus Psammodus. 
t Fig. 27. In most, if not all the species of Platycrinites the 
arms are subdivided ; they are not so in this figure, as from its small 
size they could not well be represented. The figure is intended 
to give only a general idea of the subject. 
