161 
Horsf., shot by Mr. Barrens on Krakatau in April 1919. These 
very seeds were sown by me in the Buitenzorg garden and 
grew up into specimens of this tree. Ficus species and Pipturus 
incanus Wedd. occur ntmerously in these groves. On Sebesy 
this Savanna vegetation is extremely limited. 
6°. the forest that has developed on these grassy plains con- 
sequently does not occur on Sebesy; yet in the lower parts 
where the old ash-layer is still visible is found a forest that 
looks like it and where Macaranga Tanarius L. is also general ; 
perhaps this part was formerly a savanna. 
7°. the mixed forest in the lower ravines of Krakatau and 
Verlaten Eiland consisting of few tree-species is also found on 
Sebesy but not so distinctly developed; besides on Sebesy the 
ravines are not so narrow and steep-walled as on Krakatau. 
8°. the forest of big heavy species of trees such as we got 
to know in parts of Sebesy at some 100 M., does not exist on 
Krakatau at all; big lianas are also missing, such as Gnetum 
spec., whilst on Verlaten Kiland a big liana is found, but 
another one namely Entada phaseoloides Merr. 
9°. the cultivated land and the village groves of Sebesy to- 
gether with the wildernesses of Cocos nucifera L. and Leucaena 
glauca Benth. are entirely wanting on Krakatau. 
10°. the forest on the slopes of Mt. Rakata made up of Cyr- 
tandra suleata Bl. is absent both from Verlaten Eiland which 
is too low, and also entirely missing from Sebesy. Cyrtandra 
does occur here but as a bush in the forest. 
11°. the typical forest on the dry ridge of Sebesy at about 
150 M. is entirely wanting on Krakatau. 
12°. the epiphyte flora is far richer on Krakatau than on 
Sebesy, not only that of higher plants such as orchids and ferns, 
but also of mosses. 
13°. the wildernisses of Musa so powerfully represented on 
Sebesy are wanting on Krakatau, and the gigantic Ficus varie- 
gata Bl. only occurs sporadically on Krakatau and of smaller 
dimensions. 
14°. the grass and fern.wilds of the top of Krakatau do not 
occur on Sebesy. It is true that the highest summit was not 
