SUNIER: Marine fish-ponds of Batavia. 295 
workmen were engaged in deepening the 
pond along the east side. The mud dug 
up from the margin of the pond where the 
belt-ditch runs (cf. Chapter I) was thrown 
on to the dyke surrounding the pond. In 
this mud I found a great many red Poly- 
chaeta belonging to a species of Eunice. 
The head-extremity of this Eunice species 
| seen from the dorsal, the ventral and the 
Fig. 36. Anterior part of Eunice dexter sides respectively, is rendered in 
HOM HC Eee figures 36, 37 and 38. The animals have 
five tentacles, which is characteristic of 
Eunice and a few other genera of Polychaete 
worms; the specimen from which fig. 37 
was drawn deviated in having only 
four. 
Then fig. 39 shows us a cross-section 
of an Eunice from the empangs, hardened 
in tfornmol;°in this the structure of the 
parapodia typical of this genus of Polychaeta Fig. 37. Anterior part of Eunice 
_ is visible. spec. from the Batavia empangs 
That the kontol-ayer are really the seen from the ventral side, <4. 
egg-cocoons of this Eunice species I think I may infer from the following 
facts. 
In the first place pond G of Map II on May 28th, 1918 contained a 
great many kontol ayer, and the mud dug away from that pond precisely 
from the part where the kontol-ayer occurred, that is the margins, 
contained a great many specimens of our Eunice species, but no other 
Polychaeta. 
In the second place the faeces, continually 
dropped by the live Eunice individuals just taken 
from their milieu, were exactly similar in dimen- 
sions and composition to the more or less oblong 
grains, referred to above, which are generally 
found in the hollow stalk and sometimes also 
in the stalk-extremity of the jelly-like cocoon, 
8 } frequently, at least as regards the stalk, in still 
en ee part OÙ larger quantities than are exhibited in fig. 32a 
empangs seen from the right and b. 
on From the presence of the Eunice faeces in 
the hollow stalk by which the egg-cocoon is rooted in the mud-bottom 
it follows in my opinion that this hollow stalk continues as a lining of the 
wall of the burrow in which the worm lived that laid the eggs and therewith 
secreted the jelly-like cocoon (cf. DE GROOT (2), p. 27 ff.). 
