114 Journal of the Asiatic Society of Bengal, (April, 1906. 
on the under surface of Limnanthemum leaves had a Hydra fixed. 
h 
ften more or less mutilated. By keeping a larva together 
with a free Polyp in a glass of clean water, I have been able to 
discover the reason of this, having now observed the process of 
capture and entanglement in greater or less detail on eight occa- 
passes a thread round the Polyp’s body, which it also appears 
bite. This causes the victim to bend down its tentacles, which the 
larva entangles with threads of silk, doing so by means of rapid, 
darting movements ; for although the stinging-cells of H. orientalis 
are small, they would prove fatal to the larva should they be shot 
out against its body, which is soft. Its head is probably too thickly 
co 
them and the tunnels, are sometimes made, 
They are often as much as twice as long as the larv vi 
and have a much greater calibre. Although they can be straight: 
hey are usully bent, more or less distinctly, in ie 
T 
eans 
of a special muscle, Thus it can drag the tube slowly along ® 
