EXPLANATION OF PLATE 1. 13 



18. Cestracion Phillippi, Port Jackson Shark, r. (Phil- 



lip.) P. 288.* 

 18'. Palatal Tooth of Cestracion PhilHppi. r. 



19. Tooth of Psammodus, from Derbyshire limestone, f. 

 19'. Tooth of Orodus, from Mountain limestone, near 



Bristol, f. 



20. Calymene. f -j 



21. Paradoxus, f. j- Trilobites. P. 391. 



22. Asaphus. f. J 



23. Euomphalus. f. 



24. Producta. f. 



25. Spirifer. f. 



26. Actinocrinites. f. (Miller, P. 96.) P. 417. 



27. Platycrinites. f. (Miller, P. 74.)t 



27*. Fucoides circinatus. f. (Ad. B.) From Transition 

 sandstone, Sweden. 



28. Caryophyllia. r. & f. 



29. Astrea. r. & f. 



30. Turbinolia. r. & f. 



Remains in Secondare/ Strata, 



LAND PLANTS. 



31. Pinus. r. & f. 



32. Thuia. r. & 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. 



