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, 73 42. Ulmus Bronnii (_leaf of a tree allied to the Elm_), 74 43. Palmacites Lamanonis (_a Palm of the Miocene of Aix_), 75 44. Cyclophthalmus Bucklandii (_a Fossil Scorpion of the Coal Measures of Bohemia_), 81 45. Fossil Dragon-Fly, 83 46. Cyathaxonia Dalmani, 88 47. Glyptocrinus decadactylus, 88 48. Calymene Blumenbachii, 89 49. Orthisina Verneuili, 89 50. Lituites cornu-arietis, 89 51. Lingula Lowisii, 89 52. Fort Jackson Shark (_Cestracion Philippi_), 91 53. The Genealogy of Fishes, 93 54. Amblypterus macropterus (_a Ganoid of the Carboniferous System_), 94 55. Lebias cephalotes (_Cycloids of Aix_), 94 56. Platax altissimus (_a Ctenoid of Monte Bolca_), 95 57. Pterichthys oblongus, 98 58. Pleuracanthus lævissimus, 100 59. Carcharias productus (_Cutting Tooth_), 101 60. Placodus gigas (_Crushing Teeth_), 101 61. Vespertilio Parisiensis (_a Bat of the Eocene_), 106 62. Ichthyosaurus communis, 106