SUNIER: Marine fish-ponds of Batavia. 209 
That same day, March 5th, 1918, I moreover saw how young bandeng of 
about five centimetres long were fed with Enteromorpha chopped small. 
On March 19th, 1918, I had another opportunity of examining the 
contents of the stomachs of four bandeng, caught especially for the 
purpose, which had fed on “mud”. These stomach-contents all consisted 
of Oscillatoria-filaments among which there were occasional Chroöcaccaceae 
(Gloeocapsa, Microcystis (?)). 
That same day I also saw 
in one of Mr. Görs’s ponds a good 
many fragments of Ruppia rostel- 
lata plants floating about, of which 
the leaves had evidently been eaten 
away by the bandeng. Such a 
fragment is represented in fig. 13, 
whereas fig. 4, Plate XII, shows a 
. part of an intact Ruppia rostellata 
; plant from a Batavia empang. 
In the stomach of a bandeng, 
caught from the pond in which 
those leafless fragments of Ruppia 
rostellata plants were floating SPAS 
about, I actually found Ruppia à aa u Sa 
leaves,of which moreover,as stated > À 
above, I had already found large 
quantities in a bandeng-stornach E 
on three former occasions. 
Mr. J. Görs Jr. further inr 
formed me on this occasion, how y 
in a pond from which the bandeng CUP oye aN 
had been caught away, he first 
gave. the submerged vegetation Fig. 13. Fragmeat of a Ruppia rostellata 
sine 2 ” KocH plant of which the leaves have been 
consisting chiefly of “lumut eaten away by the bandeng, drawn from a 
kain” (Chaetomorpha (terbipolen Basayia,empang ey Men Ogu re 
sis LAGERH. (?)) and further of 
the other plants described in Chapter IV, a chance to develop again as 
food for the bandeng, before he let loose new bandeng into such a 
pond. Thus pond G of Map II at that momentcontained no bandeng. 
Regarding the submerged vegetation which began to develop at that 
moment in this pond G, compare Chapter IV. 
That same 19th March Mr. J. Görs Jr. also showed me the pond 
F of Map Il, near the sea. That pond at the moment contained no “lumut” ') 
') By “lumut” (=algae) or “algal” vegetation is meant here and in this Chapter 
in general the submerged vegetation described in Chapter IV, consisting mainly of 
Chaetomorpha and reaching up to just beneath the surface of the water. 
