52 
Blood Parasites 
The anterior half consists of closely packed nuclei which terminate 
about b fjb from the end, in the posterior half the nuclei are arranged 
loosely in a sort of adenoid reticulum which also ends about 6 p, from 
the extreme end. 
It measured about 270 ,u, long and 16'5 p, in width. 
Embryo Filaria in the Bat. 
In the peripheral blood of a noctule one micro-filaria, associated 
with spirochaetes, was found. The parasite, which was enclosed in a 
sheath a little longer than the embryo filaria, was full of closely packed 
large nuclei. The oral extremity is blunt, and from thence the parasite 
at first diminishes and then, at a distance of about 10/x., expands in 
width for a short distance. Afterwards it gradually gets thinner and 
ends in a sharp tail, which is slightly coiled up in the sheath. 
The measurement of this micro-filaria was ; 110 yu. long, 6 p. in width 
near the anterior end, and 5 /a wide in the middle. The width of the 
sheath was about 8‘5 to 9 p and its length slightly less than that of the 
contained parasite. 
Embryo Filaruie in Birds. 
Embryo filariae are extremely commonly met with in the blood of 
blackbirds and thrushes, and I should think that next to the Leucocy- 
tozoa they are the commonest blood parasite met with in these birds. 
They vary enormously in their length, some measuring about 140 to 
150/1. and 5 p. in width, others reaching more than 400/6 with a 
transverse measurement of 8 /6. 
These parasites are often associated with Halteridia, Leucocytozoa 
and sometimes Trypanosoma. The blood not infrequently shows an 
increase in the percentage of the eosinophile cells. 
Protomonadina. 
Whilst examining the blood taken from the heart of the common 
lizard {Lacerta sp.) which had been dead about two hours I met with 
several examples of flagellate protozoa. 
These were usually round, sometimes oval, rarely pear-shaped. 
They measure about 8 to 12/6 in diameter, and stain a pale blue colour 
with Giemsa. The protoplasm is granular, and towards the margin of 
the cell is situated the nucleus which stains a deep red colour. From a 
point near, but not touching the nucleus, one, usually two, long flagella. 
