A. C. Coles 
which the granules are seen being discharged from the more pointed 
end of the parasite. 
Sometimes towards one or both ends of the parasite are small areas 
in which the protoplasm is quite homogeneous and contains no 
granules. These patches are stained a very pale red colour with 
Giemsa, and seem to constitute what Dr Annie Porter describes as 
caps of chromatin. At other times similar patches are seen near the 
nucleus. 
The nucleus varies in size, shape and position. Usually it lies 
nearer one end than the other, and may even be situated near the 
extreme end, at other times it is central in position. < 
It may be round, oval, square or triangular in shape and in one or 
two instances if constitutes a broad band running transversely across 
the parasite, from side to side, very much like the condition met with 
in the microgametes in tertian malaria fever. 
In one case the nucleus, which was oval in shape, is seen to be 
cleai'ly divided by lines into six or seven segments running parallel with 
the long axis of the parasite. This no doubt is evidence of the existence 
of myonemes. 
The nucleus measures on an average .5'2 fx, long and 5’6 /r broad. 
The structure of the nucleus seems to be largely vesicular. Some¬ 
times it consists of a number of chromatin granules closely packed 
together and at other times it is a dense deeply stained structure. 
This haemogregarine seems closely allied to that described by 
Dr Annie Porter (1908), Leucocytozoon mnsculi. Should the parasite 
I have found prove to be a new species I would suggest the name 
Haemogregarina sylvatici sp. n. 
The Haemamoebae of Bats—Pipistrelle. 
I have met with two forms of intracorpuscular parasites in Vesperugo 
pipistrellus, a pigmented parasite, Haemamoeba or Polychrornophilus, 
and an unpigmented parasite Achromaticus vesperuginis. The latter 
I have regarded as a Piroplasma. 
The pigmented parasite is evidently not common, and I only met with 
it once out of 25 bats examined. It was found in the blood of a 
Pipistrelle caught in a room just outside the town on Oct. 18, 1912. 
The following types were noticed in this specimen (Plate II, fig. 18): 
1. Small signet ring-shaped parasites, measuring about 2 to 2'5/x 
in diameter, situated sometimes near the centre but more frequently 
3—2 
