202 TREUBIA VOL. II, 2—4. 
In addition to the fish already mentioned by VAN KAMPEN (2), I 
frequently found fairly large quantities of lundu (Macrones gulio (HAM. 
BUCH.)) in the empangs. The lundu is well known as a genuine coastal 
and brackish water fish. DAY (7) and also WEBER and DE BEAUFORT (%) 
say that Macrones gulio (HAM. BUCH.) occurs “in seas, estuaries and 
tidal rivers”. 
Yet this fish, at home in a milieu where the salinity may vary 
considerably, evidently bore the increase of the salinity in the empangs 
in the latter half of 1918 far less well than e.g. Haplochilus panchax 
(HAM. BUCH.), which is originally a genuine fresh water fish. As reported 
in Chapter IV I observed on September 24th 1918 in pond A of 
Map Il, where the salinity had gone up to 75.6 °/oo, a large number of 
Macrones gulio (HAM. BUCH.) floating about at the surface of the water, 
belly upwards and dying. These animals looked more or less dried out 
and shrivelled and were exceedingly slow in their movements. Therefore 
(cf. also Chapter VI) I think I may assume that this general dying of Macrones 
gulio (HAM. BUCH.) was directly connected with the just mentioned high 
salinity of the pond-water. 
Occasionally I also found kerrong kerrong paddi (7herapon 
jarbua BLKR.) in the empangs. 
I was further able to ascertain the presence in the empangs of the krapu 
lumpur (Epinephelus pantherinus BLKR.); of the buntel barih (Zefrodon 
immaculatus LAC. = Crayracion immaculatus BLKR.), and of a number of 
Gobiidae, among which were species of Gobius, Periophthalmus and Eleotris. 
The Periophthalmus species, called ikan glodok, however, are still 
more at home in the mangrove- and Nipa-belt than in the empangs. 
Besides the bandeng proper (Chanos chanos (FORSK.)) and the 
bandeng lelaki (Elops hawaiensis T. REGAN) there is yet an other fish 
which occurs, though not frequently, in the empangs and bears the name 
of bandeng, viz. the bandeng tjururut (Albula vulpes (L.)). Only once 
did a specimen of this latter fish, captured in the empangs, get in my 
possession. 
The above enumeration may be said to include all the more commonly 
occurring species of fish of the empangs. It is net improbable however that 
if one took sufficient trouble one might ascertain the occasional occurrence 
of still many other species of fish there. 
Many of those who have visited the Batavia empangs, will have 
been struck by the mostly oblong pear-shaped jelly-like masses which 
occur so frequenily in the marine fish-ponds, where under the water 
the perpendicular pond margins pass into the pond bottom. These 
oblong pear-shaped jelly-like masses in which a large number of 
very fine grains can be discerned with the naked eye, and which 
are fixed to the pond-bottom by a likewise jelly-like but slightly more 
