56 
Blood Parasites 
of these in the gondi as pseudo-cysts). This is in marked contrast to 
the true multiplication cysts of Haemogregarines also present in this 
case. (Plate V, fig. 12.) 
On two occasions a crescentic shaped Toxoplasma was found lying on 
or in a red blood corpuscle. The focus of the pai’asite and of the red 
cell was ^^recisely the same, but as only two perfect examples were 
found in numerous films it is probable that the parasites were merely 
lying accidentally on the surface of the corpuscle. 
As to the distribution of the parasites. In the blood taken from 
the heart only few examples of free forms or an occasional leucocyte 
containing one or two parasites were seen, and even these might have 
been accidental. In smears from the lung free forms both single, 
double, in groups of four or more elements as well as the intracellular * 
forms were much more numerous, whilst in smears made from the liver 
all forms were exceedingly numerous. 
Multiplication takes place by binary fission. The toxoplasm becomes 
oval or spherical, the nucleus separates into two, and the protoplasm 
divides longitudinally, very rarely transversely. 
Haemogregarine of the Squirrel. 
I found, associated with the presence of Toxoplasma, haemogregarines 
both free or enclosed within the protoplasm of the mononuclear leuco¬ 
cytes. 
These were most numei’ous in films made from the lungs, less 
numerous in the blood taken from the heart, and rare in liver smears. 
Free Haemogregarine. The parasites usually are slightly curved, 
sausage or kidney shaped structures with rounded ends. (Plate V, 
figs. 1 to 8.) 
The nucleus, which is situated in the middle or somewhat nearer 
one end of the parasite, is generally round or oblong in shape. Some¬ 
times it consists of bands of chromatin extending transversely across 
the body, but more frequently it is made up of a compact mass of 
chromatin somewhat circular in shape. 
The protoplasm, which is almost invariably stained a faint reddish 
or pink colour, never blue, is sometimes almost homogeneous but often 
it contains a mass of granules situated especially towards one or other, 
rarely both, poles. In many of the haemogregarines which are slightly 
narrower and more deeply stained, one end of the body is secured and 
this pointed end lies closely applied to the body. (Plate V, fig. 7.) 
