20 



THE WORLD OF LIFE 



on one mountain slope in Carintliia ; Primula imperialis, on 

 the summit of Mount Pangerago in Java, and many others. 



In order to compare the plants of different parts of the world 

 in their various relations, De Candolle divides the whole land 

 surface into fifty botanical regions, each distingTiished by the 

 possession of a considerable proportion of peculiar species of 

 plants. These regions are of greatly varying extent, from Xo. 

 18, comprising the whole of Xorthern Asia, to Xo. 10, limited 

 to the small island of Tristan d'Acunha in the South Atlantic. 



The list is as follows : — 



A. De Candolle's Botaxical Regions 



1. Arctic zone. 



2. Europe, temperate. 



3. Mediterranean. 



4. Azores, Madeira, Canaries. 



5. Sahara, Cape Verde Islands. 



6. Guinea N., Soudan. 



7. " S., Congo, Benguela. 



8. Island of St. Helena. 

 0. South Africa. 



10. Tristan d'Acunha. 



11. Islands of Kerguelen, St. Paul, 



etc. 



12. Madagascar, etc. 



13. Mozambique, Zanzibar. 



14. Abyssinia to Egypt. 



15. Persia, Euphrates. 



16. Caucasus, Armenia. 



17. Tartary east of Caspian. 



18. Siberia, Ural to Kamschatka, 



Lake Aral. 



19. Asia Central. 



20. Afghanistan to Indus. 



21. Nepal to Bhutan. 



22. China, Japan. 



23. Philippines. 



24. Siam, Cochin China. 



25. Burma and Assam. 



26. Bengal, Ganges. 



27. Peninsular India, Ceylon. 



28. Malacca, N. Ireland. 



29. Australia, New Zealand. 



30. Fiji to Marquesas. 



31. Mariannes, Carolines. 



32. Sandwich Islands. 



33. N.W. America. 



34. Canada and United States. 



35. Texas, California, Mexico. 



36. West India Islands. 



37. Venezuela. 



38. Colombia. 



39. Peru. 



40. Galapagos. 



41. Bolivia and Andes. 



42. Guayanas. 



43. Amazonia. 



44. Brazil N.E. 



45. "" W., Paraguay. 



46. " S.E. 



47. Uruguay, La Plata. 



48. Chile, Juan Fernandez. 



49. Patagonia, Falkland Islands. 



50. The Antarctic Archipelago. 



By an extensive comparison of floras all over the world it 

 is found that less than Ave per cent, of the total of the kno^vn 

 species are found in more than two of these regions. Fam- 



