Fig.57. Hexactinid (belonging to the Hal- 
campina?) from the Batavia empangs. <4. 
Fig. 58. Larva of Scirfes spec. 
from a fish-pond dug amidst the 
Rhizophores by the population 
of the coral-island Amsterdam. 
Salinity of the pond water 
35.9%,, Dorsal view. X 71/2. 
__SUNIER: Marine fish-ponds of Batavia. 301 
20th of November 
1918, at a salinity of 
35.9 Joo, and after- 
wards on May 15th 
1919 at a salinity of 
251000 AS it ap- 
pears from an article 
by NOWROJEE (°°), 
we are dealing here 
with the larva of 
a Senntes species 
(family Dascillidae, 
Polymorpha, Coleop- 
tera). NOWROJEE (°*) 
says about his larvae 
of Scirtes grandis 
Mens. “they are 
“much lighter than 
“water and cannot 
“remain under the 
“surface without 
“clinging to some 
“support, and when 
Toreed to» let so 
“their hold they 
“quickly rise to the 
“surface. Occasion- 
“ally they float pass- 
viated very con- 
siderably from 
the Batavia em- 
pangs dealt with 
in this publica- 
Oo, Bor wes 
animal I found 
in a temporary 
sea fish-pond 
dug amidst the 
Rhizophores by vegetation in the Batavia em- 
the population 
of the coral-island Amsterdam (PuluUntung 
Djawa), situated just north of the western 
extremity of the Bay of Batavia. 
I found the little animal here on the 
Fig, 56. Nudibranch occur- 
ring among the submerged 
pangs. Ventral view, X121/2. 
Fig. 59. Larva of Scirtes spec. 
from a fish-pond dug amidst the 
Rhizophores by the population 
of the coral-island Amsterdam. 
Salinity of the pond water 35.9°/oo. 
Ventral view. X 7!/2. 
