14. _Thuites_, of which he gives no characters, but refers to his figures. 15. _Antholites._ 16. _Carpolites._ 17. _Conites._--Fossil strobili. 18. _Sphenopteris._ 19. _Polypodiolithus._ 20. _Myriophyllites._ 21. _Phyllites._ 22. _Algacites_, which the French translator, on obtaining the opinion of Professor Agardh, has changed into _Sargassum_; that celebrated algologist having considered it as identically the same as that genus of recent algæ. The genera thus successively established, may be arranged in the following order:-- A. Fossil plants of unknown origin, in which the stem is large, and forms the only, or at least the most prominent character; including, 1. _Lepidodendron_; 2. _Variolaria_; 3. _Calamites_; 4. _Syringodendron_; 5. _Rhytidolepis_; 13. _Lepidolepis_. B. Fossil plants, of unknown origin, in which the leaves form the prominent character; including, 6. _Flabellaria_; 7. _Schlotheimia_; 8. _Annularia_; 9. _Nœggerathia_; 12. _Rotularia_. C. Fossil parts of unknown plants; including, 15, _Antholites_; 16. _Carpolites_; 17. _Conites_. D. Fossil plants, or parts of plants referable to living types; including, 10. _Osmunda_; 11. _Asplenium_; 14. _Thuites_; 18. _Sphenopteris_; 19. _Polypodiolites_; 20. _Myriophyllites_; 22. Algacites. * * * * * In November 1821, Professor Martins read to the Botanical Society of Ratisbon, a paper which was afterwards published in its Memoirs for 1822. This paper was entitled, "_De Plantis nonnullis Antediluvianis ope specierum inter tropicos viventium illustrandis_;" in it several of the species mentioned by Baron Schlotheim and Count Sternberg are referred to the orders and genera of recent plants; and the following genera are proposed:-- 1. _Filicites_, analogous to the Arborescent ferns. 2. _Palmacites_, analogous to the Palmæ. 3. _Bambusites_, analogous to Bambusia, and other arborescent grasses; these are the _Calamites_ of other authors. 4. _Yuccites_, analogous to the Cuciphoræ, Dracenæ, Pandani, Yuccæ, and Velloriæ, of botanical writers. 5. _Cactites_, analogous to the Cacti. 6. _Euphorbites_, analogous to the Cereiform species of Euphorbia. 7. _Lychnophorites_, analogous to _Lychnophora_, a genus of plants found by Martius in Brazil, which belongs to the order of the Compositæ, and is allied to the _Vernoniæ_ of Linnæus and the _Pollalestæ_ of Humboldt. * * * * * M. Adolphe Brongniart has given the following classification of fossil plants, in his Essay "_Sur la Classification et la Distribution de Végétaux Fossiles_" inserted in the "Mémoires du Muséum d'Histoire Naturelle;" and also printed separately in quarto, Paris, 1822:-- STEMS. Class I.--Stems whose internal organization is recognisable.