STUDIES ON CEYLON HAMATOZOA. 679 
of digestion and the searching for more food. All the leeches 
captured that I opened were empty of blood, but they could 
not by any means always be made to feed—I opened some of 
the ones that had refused, and found that they were empty. 
On the other hand a leech which had obviously fed on 
December 2nd fed again on February Ist: this beast was 
eaten by the tortoise, but it seemed to have been feeding and 
certainly left a wound. Curiously enough all the land leeches 
I examined were empty, and that was also Dr. Willey’s 
experience in the jungle. This is possibly due to the fact 
that the fed leeches are not in search of prey, and therefore 
not so easily found. 
On one occasion a curious example was given of how 
indifferent the water-leech is as to whether it feeds upon 
warm- or cold-blooded creatures. | had tried to make one 
of them feed upon a Saccobranchus infected with ‘Trypano- 
somes with a view to discovering if any such change occurred 
as that seen in 'l’. vittate, the leech steadily refused to feed. 
I then took it out of the tank, and it instantly attacked my 
hand making the customary little triradiate scar and drawing 
blood. It was made to desist, and then immediately put on 
to a tortoise where it quite contentedly made a large meal. 
‘he experiments with the Diya kudella were now aban- 
doned as what appears to be the true intermediate host was 
come upon. 
Dr. Willey, while making some observations at Kesbewa, 
about eight miles from Colombo, found three Emyda with a 
number of small leeches attached to the back of the neck, 
the angles between body ard limbs, and the region near the 
tail. He very kindly brought them to me at once. ‘The 
leech is a very small creature. It attaches itself to the tor- 
toise, but is most capricious about staying on it; I found it 
a most troublesome little animal to work with on that account. 
lt is not very easy to keep it alive in captivity. 
The leech belongs apparently to the genus Glossiphonia, 
and has a trick of lying together in little clumps; it is able 
to swim, and also covers the ground rapidly by walking 
