58 
Blood Parasites 
Tlie average measurement of ten C 3 ^sts was 25 /u, by 18 7 fM. 
The cysts are invariably stained a distinct blue colour with Giemsa 
and contain either partially differentiated protoplasm, or a number of 
definite blue stained merozoites, or not infrequently merely granular 
debris. It was difficult to determine the actual number of the mero¬ 
zoites as they were usually somewhat ill-defined, but I should say they^ 
varied from 8 to 20. 
From the limited amount of literature at my disposal I think that 
both the Toxoplasma and Haemogregarine found together in the organs 
of this squirrel are new species, and although a few haemogregarines 
have been found in mammals in England—amongst these that of the 
field vole and field mice which I have previously described—yet 
apparently no Toxoplasma has been previously recorded in animals in 
this country. 
It is reasonable to suppose that in this particular squirrel the 
presence of the Toxoplasma in such large numbers might have been the 
direct cause of death. 
I have proposed that these parasites should be termed Toxoplasma 
sciuri and Haeviogregarina sciuri respectively. 
EEFERENCES. 
Coles, A. C. (1. iv. 1911). The fading of Aniline-stained Microscopical Prepara¬ 
tions. Lancet. 
-(1906). The Blood, how to examine and diagnose its Diseases. Churchill. 
3rd edition, 301. 
- (5. II. 1913). Trypanosomes found in a Cow in England. Parasitology, v. 247. 
Delanoe, M. and Mme Pierre (7. x. 1912). Sur les Rapports des Kystes de 
Carini du Poumon des Rats avec le T. lewisi. Compt. Rend. Acad. Sci. clv. 
658-660. 
Eantham, H. B. (1910). Leucocytozoon Lovati. Parasitic Protozoa of Grouse. 
Proc. Zool. Soc. London, 691. 
FRANgA (1912). Archivos do Reed Instituto Bacteriologico Camara Pestana, in. 
(Quoted by Prowazek.) 
Laveran et Mardllaz (1913). Contribution k I’etude morphologique du To.vo- 
plasnia gondii et du T. cunicxdi. Compt. Rend. Acad. Sci. clvi. 1298. 
Luhe, M. (1906). Die im Blute Schmarotzenden Protozoen und Hire ndchsten 
Verwandten. Leipzig, 225. 
Minchin, E. a. (1909). Observations on the Flagellates parasitic in the Blood of 
Fresh fyater Fishes. Proc. Zool. Soc. London, 2. 
- (1912). An Ditroduction to the study of the Protozoa. Arnold, 258. 
Nuttall, G. H. F. and Graham-Sjiith (1908). \Piroplasma hovis, etc.] Parasi¬ 
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