72 Formation of Plant- Associations 



areas are everywhere ready to hand to industrious settlers and 

 Krakatau will long remain, as it was before the eruption, uninhabited 

 and will be visited only for a short time by a few fishermen or by 

 explorers. A fi*esh growth will continue to spread from the shore 

 and from the slopes of the mountain, the grass steppes of the inter- 

 mediate zone will grow less and less and finally disappear. At last 

 after a long interval the vegetation on the desolated island will again 

 acquire that wealth of variety and luxuriance which we see in the 

 fullest development which Nature has reached in the primaeval forest 

 of the tropics. 



ADDENDUM I 



(Footnote, p. 29.) 



Lotsy states in his Vorlesungen iiber Deszendenztheorien, Pt. ii. p. 479 

 (G. Fischer, Jena, 1908), that an old Cycas found by Dr Valeton on the island a 

 few years ago is supposed to be the only remnant of the original vegetation. As the 

 results obtained during the expedition of 1905, in which Dr Valeton took part, have 

 not been published it is impossible to say whether the " Old Cycas " is identical with 

 the specimen which we found on the beach of the south-east coast of Krakatau. 

 Although our plant had reached a considerable size relative to the short existence 

 of the new flora, it certainly does not belong to the original vegetation of the island : 

 it occurs on that part of the littoral zone which was formed as a result of the eruption 

 of 1883 



ADDENDUM II 



(Footnote, p. 34.) 



While the English translation was in the press, Mr Verbeek informed me in 

 a letter that on a third visit to the island of Krakatau, he succeeded in taking 

 a good photograph of the middle part of the steep rock-face. A print) with a short 

 explanatory note, was afterwards forwarded by the government of the Dutch East 

 Indies to those libraries which had officially received a copy of his work on Krakatau. 

 The copy at my disposal did not contain this photograph : hence the above statement. 

 I take this opportunity of thanking Mr Verbeek for information which he kindly 

 supplied at my request on this and other points. 



