54 
Blood Parasites 
Toxoplasms and Haemogregarines of the Squirrel. 
Toxoplasma soiiiri et Haemogregarina sciuri sp. nov. 
Two squirrels purchased in London were kept in an aviary with 
two American grey squirrels. The English squirrels died and their 
bodies were taken to Mr Rohu a taxidermist (of Bournemouth) to be 
mounted. He kindly brought me the heart, lungs and liver of one of 
the squirrels in order that I might examine the blood. I would here 
express my thanks to Mr Rohu for these and several other specimens 
that he has sent me. 
In the heart blood, liver, and lungs I found both Toxoplasmae and 
Haemogregarinae. 
As far as I know, quoting from Muss H. L. M. Plxell (1913) 
Toxoplasmae have only been found in 
Tox. gondii, in Tunisia by Nicolle and Manceaux. 
Tox. cuniculi, (Carini) in Brazil. 
Tox. canis, (Mello) in Italy and Brazil. 
Tox. talpae, (Prowazek) in Japan. 
Tox. colnmhae, (Yakimoff and Kohl-Yakimoff) 
1. The Gondi, 
2. Rabbit, 
3. Hogs, 
4. Moles, 
5. Pigeons, 
Brazil. 
Toxoplasma of the Squirrel. 
Parasites were very numerous in the liver, less numerous in the 
lung, and very scanty in the heart blood, although they were first 
detected in the latter. Tliey were found free and in the protoplasm of 
the leucocytes and endothelial cells. 
Free Toxoplasma. The free parasites occur as small crescentic oval 
or rarely round shaped bodies. The crescentic shaped free bodies are 
in appearance somewhat intermediate between a malarial crescent and 
a Leishman-Donovan body but they are much smaller than the former. 
(Plate V.) Usually one end of the crescent is more pointed than the 
other, sometimes however the ends are symmetrical. The crescentic 
shaped forms are probably the most numerous whilst the round form 
is quite infrequent. Commonly these small bodies are single, but 
double forms, evidently dividing para.sites, are also very common. 
They are also found in fours, just separated or closely bound 
together. Circular agglomerations of 6, 8, 12 or even 20 bodies are 
not uncommonly met with. (Plate V, figs. 17, 19, 22.) Occasionally 
a compact group of 50 to 60 parasites is seen. (Plate Y, fig. 23.) In 
