ntispiece_)

1. The Genealogy of Plants, 40

2. Cyclopteris Hibernicus, 42

3. Conifer of the Lower Old Red Sandstone, 43

4. The Genealogy of Animals, 45

5. Oldhamia antiqua (_oldest known Zoophyte_), 48

6. Palaeochorda minor, 49

7. Lycopodium clavatum, 51

8. Equisetum fluviatile, 51

9. Osmunda regalis (_Royal Fern_), 52

10. Pinus sylvestris (_Scotch Fir_), 53

11. Calamite? of the Lower Old Red Sandstone, 55

12. Lycopodite? of the Lower Old Red Sandstone, 55

13. Fern? of the Lower Old Red Sandstone, 56

14-19. Ferns of the Coal Measures, 58

20. Altingia excelsa (_Norfolk Island Pine_), 59

21. East Indian Fern (_Asophila perrotetiana_), 60

22. Section of Stem, of Tree-Fern (_Cyathea_), 60

23-25. Lepidodendron Sternbergii, 62

26. Calamites Mougeotii, 63

27. Sphenophyllum dentatum, 63

28. Sigillaria reniformis, 64

29. Sigillaria reniformis (_nat. size_), 65

30. Sigillaria pachyderma, 66

31. Stigmaria ficoides, 67

32. Favularia tessellata, 68

33. Lepidodendron obovatum, 68

34. Cycas revoluta, 69

35. Zamia pungens, 69

36. Zamia Feneonis, 69

37. Mantellia nidiformis, 70

38. Equisetum columnare, 71

39. Carpolithes conica, 72

40. Carpolithes Bucklandii, 72

41. Acer trilobatum,