INTRODUCTION. IX 



These genera thus successively developed by the Count, 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. Lepido- 

 dendron; 2. Variolaria; 3. Catamites; 4. Syringodendron ; 5. Rhyti- 

 dolepis; \3. Lepidolepis. 



B. Fossil plants, of unknown origin in which the leaves form the prominent 



character; including 6. Flabellaria; 7. Schlotheirnia ; 8. Annularia; 

 9. Nceggerathia : 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. Poly- 

 podiolites ; 20. Myriopliyllites ; 22. Algacites. 



In November 1821, Professor Martius read to the Botanical Society of Ratisbon, 

 a paper which was afterwards published in their Memoires for 1822. This paper 

 bore for its title, " De Plantis nonnullis Antediluvianis ope specierum inter tro- 

 picos viventium illustrandis ; " in it he has referred several of the species men- 

 tioned by Baron Schlotheim and Count Sternberg, to the orders and genera of 

 recent plants, and founded the following genera: 



1 . Filicites, analogous to the arborescent ferns. 



2. Palmacites, analogous to the palmae. 



3. Bambusites, analogous to bambusia, and other arborescent grasses ; these 



are the calamites of other authors. 



4. Yuccites, analogous to the cuciphoras, dracenae, pandani, yuccae, and 



velloriae of the botanical writers. 



5. Cactites, analogous to the cacti. 



6. Euphorbites, analogous to the cereiform species of euphorbia. 



The variolaria ficoides of Sternberg seems to Professor Martius to be analogous 

 either to the cacalias or ficoideas. 



7. Lychnophorites, analogous to lychnophora, a genus of plants found by him 



in Brazil, which belonged to the order of the compositae, and is allied to 

 the vernoniae of Linnaeus and the pollalestae of Humboldt. 



b 



