Haliserites, 39. Hartt, Prof., 53. Heer, Dr., 108, 181. Helderberg period, Sea of, 250. Heterangium, 77. Hicks, Dr., 21. Hunt, Dr. Sterry, 13, 143. Huxley, Prof., 53. Hymenæa, 204. Insects, Erian, 83. Juglans, 196. Jurassic flora, 177. Kainozoic flora, 191, 208, 214, 219. Kidston, Mr. R., 128, 273. King, Mr. Clarence, 211. Komé, Plants of, 242, 281. Laramie flora, 209, 215. Laurentian plants, 8. Laurentian, Climate of, 17. Laurophyllum, 193. Laws of introduction of plants, 237, 266. Leda clay, Flora of, 232. Lepidodendron, 120, 156, 162. Lepidophloios, 121, 157, 165. Leptophleum, 157. Lesquereux, Mr. L., 169, 214. Licrophycus, 30. Lignitic series of America, 208. Liquidambar, 197. Liriodendron, 199. Lower Carboniferous flora, 277. Logan, Sir W., 48. Lyell on climate, 249. Magnolia, 200. McConnell, Mr., 209. McNab, Prof., 169. Megalopteris, 76. Megaphyton, 129. Mesozoic flora, 175. Climate of, 178. Migrations of plants, 240, 245. Miller, Hugh, 98. Miocene flora, 220. Miocene, Supposed, 242. Modern flora, 219. Modern plants, how modified, 269. Modifications of plants, 266. Nathorst, Dr., 26, 196. Nematodendreæ, 25. Nematophycus, 23. Nematophyton, 21, 22, 42. Newberry, Dr., 200, 203, 214. Newfoundland, Fossil plants of, 242. Newton, Mr., 52. Nicholson, Dr. A., 20. Niobrara series, 243, 246. Noeggerathia, 130. Northern origin of plants, 238. Origin of plants, 237. Orton, Prof., 51. Pachytheca, 21. Palæanthus, 205. Palæochorda, 30. Palæophycus, 30, 38. Palæozoic floras compared, 273. Palms, 188, 194. Pandanus, 188. Patoot beds, 282. Peach, Mr., 98. Petroleum, Origin of, 56. Phymatoderma, 29. Plants, Classification of, 6. Platanus, 198. Platyphyllum, 74. Pleistocene climate, 227, 230. Pleistocene flora, 223, 227. Pliocene climate, 223. Podozamites, 178. Poles, Supposed change of, 248. Populus, 191, 228. Potamogeton, 229. Potentilla, 228. Protannularia, 21. Protichnites, 27. Protophyllum, 199. Protosalvinia, 52. Protostigma, 20. Prototaxites, 21. Psaronius, 93. Psilophyton, 64. Ptilophyton, 62, 86. Quercus, 197. Rhizocarps, 48. Rill-marks, 33. Rusichnites, 28. Saccamina, 57. Salisburia, 180. Salter, Mr., 98. Salvinia, 54. Saporta, Count de, 26, 193. Saportea, 57. Sassafras, 199. Scalariform tissue, 70. Schimper, Dr., 116, 169, 208. Scolithus, 30. Scottish Devonian, 98. Sequoia, 181. Shrinkage cracks, 33. Sigillaria, 71, 112, 154. Southern Hemisphere, 217, 273. Carboniferous in, 147. Tertiary in, 217. Sphenophyllum, 61, 122, 171. Spirophyton, 38. Spitzbergen, 241. Sterculites, 193. Sternbergia, 137, 152. Stigmaria, 115. Stur, Dr., on Sigillaria, 116. Symphorocarpus, 214. Syringodendron, 156. Syringoxylon, 82.