18 JOHNS HOPKINS UNIVERSITY MORPHOLOGICAL MONOGRAPHS. 
temperate medus. Romanes’ Sarsia became frantic when placed in 
milk-warm water. 
While writing the above, I was led to wonder whether the 
temperature of the water may not have been the stimulating 
influence in those experiments on light (previously noted) in which 
the medusz continued to swim actively in the sunlight. 
Food and Feeding.—See Experiment 36. : 
I again make note of a few observations made by myself on 
the Olindiad. A crustacean became entangled in the tentacles of a 
medusa; apparently this wished to retain it, for the proboscis reached 
in the direction of the crustacean, which, however, got away. I then 
placed, by means of a needle, another small crustacean against one of 
the tentacles. This was seized but not retained, for the animal 
pulsated and it was washed away by the water. Twice I saw a good- 
sized crustacean in the proboscis. In one instance the velum appeared 
to hold the part of the crustacean not yet in the proboscis. I noticed 
another with a crustacean wholly in the proboscis, which was much 
lengthened out, the upper part of the crustacean being in the stomach. 
The next morning the crustacean was wholly in the stomach and the 
proboscis normal. At 5.30 p. M. the crustacean was ejected, nothing 
but the shell and some rubbish remaining. 
These medusz seem to pay no attention to being touched by one 
of their kind, except to give a pulsation or two. 
The proboscis appears very “intelligent” in its actions.* First, 
some of the tentacles can be seen to contract and to bend inwards, 
then the side next the tentacles contracts and the proboscis is seen 
to reach in that direction. I could not see, however, what the irritant 
was. 
Occurrence of Charybdea— Experiments 37-40.—Dr. Conant’s remarks 
(““Cubomedusz”’) on the occurrence of Charybdea at the surface of 
quite shallow water and near the shore (which is quite at variance 
with former observations, that the Cubomeduse are essentially deep- 
sea forms) are further borne out by his observations at Port Antonio. 
As already noted in the Introduction, Charybdea was here found in 
abundance in quite shallow water and near shore, but on the 
*By no means do I wish to attribute intelligence to these animals. 
