165 



A few specimens somewhat behind the beach, climbing 

 in Ficus-ttees (No. 15 and 16 herebefore). 



Compositae. 



21. Blunica balsamifera D. C. See p. 51. 



A few specimens in somewhat open spots in the grass- 

 jungle. In 1906 I did not observe any other Compositae in 

 the interior on the S. h. side. Ernst' 1 ) mentions to have 

 seen ,,einige gelbbliihende Compositae", but all these may 

 have belonged to this species. 



D. PLANTS MENTIONED BY ERNST, THE EXACT HABITAT OF 

 WHICH IS UNKNOWN TO ME. 



Bacteriaceae. 



/. Bacterium Krukataui DC Kruyfl. 



Aerobic nitrogen-fixing bacterium isolated by De Kruyff-) 

 from soil-samples collected by Ernst in the Casuarina- 

 grove (on the south-eastern angle) and in the Pes-caprac- 

 formation (where ?). 



2. Bacillus mycoides F/uegge. 



3. Bacillus Moire :i ) (B. megatherium De Bary ?). 



These two species were isolated from soil-samples '') 

 collected either in the Barringtonia-iormation, the Casuarina- 

 grove, the littoral zone or the interior. Very numerous. 



4. Bacillus raclicico/a Beyerinck, (Bacterium radicicola Beyerinck). 



Diverse Leguminosae of the beach (Canava/ia, Erythrina, 

 Vigna} bore on their roots nitrogen-tubercles. 



5. Pseudomonas fluorescens Migu/a (In Ernst's paper named 



Bacillus fluorescens liquefaciens Fliigge). 



This species was isolated from soil-samples collected 

 either in the Barringtonia-tormat\on, the Casuarina-grove, 

 the littoral zone or the interior. 



!) Ernst, Neue Flora Vulkaninsel Krakatau (1907), p. 33. 



'-) E. De Kruyff, Sur line bacterie aerobe fixant I'azote libre de ('atmosphere, 

 in Bull. Dep. Agric. Ind. Neerl. (1906), p. 9. 



3 ) 1 have not been able to find back this singular name in the systematic litter- 

 rature at my disposal. 



4 ) ,,In alien 4 Proben fanden sich ferner Erreger der Cellulose-, Pektinstoff- und 

 Starkegarung, sowie Urobakterien. Auf der Papierplatte" (Methode Van Iterson) 

 ,,kamen zahlreiche Schimmelpilze zur Entwicklung" (Ernst, Neue Flora Vulkaninsel 

 Krakatau (1907), p. 53). 



