140 



It appears from this survey that the above 6 species were present 

 both in 1897 and in 1906, 5 of them in numerous specimens. It is not 

 to be believed that they were lacking in 1905, the less if one takes 

 into account that 4 of them are perennials and that two (No. 1 and 

 No. 5), both large shrubs or small trees, were represented in 1906 by 

 adult specimens. A much more plausible explanation of them not 

 having been recorded by Valeton is that the investigation of 

 1905 was less accurate or less extensive than those of 1897 and 

 1906. And the only conclusion that can be safely drawn from this 

 list is that conclusions as to a vegetation growing poorer of richer 

 can never safely be drawn from very incomplete lists. 



The eastern side, which Valeton was the first to investigate, 

 yielded 10 species (of which 7 littoral or halophilous ones) or, as- 

 suming that all plants of unknown habitat were found on this side 

 of the island, 31 species of which 13 littoral or halophilous plants. 

 The next year Hrnst and his companions found on the south-east 

 and east side 51 plants, 36 of which were littoral or halophilous 

 species. From this may only be concluded once more that the 

 investigation of 1905 was less extensive or less accurate than that 

 of 1906. It could hardly be otherwise, the one-day tourist-trip of 

 Valeton was never meant to be a scientific excursion nor 

 was it executed as such. A complete and careful investigation 

 of the difficultly accessible locality would have required many 

 months. 



The following plants were in 1905 found for the first time on 

 Krakatao: 



