112 J. B. CLELAND. 
Harvey Johnston and myself! have found Hepatozoa in 
Australian rats. In 1906, whilst in Perth, Western Aus- 
tralia, I first met with a Hepatozoon in the local rats. This 
was on the day after reading Balfour’s article? on a new 
hemogregarine of mammals, in the gerboa, Jaculus jaculus 
(gordoni), which he designated Hemogregarina jacult, but 
added in a footnote that Laveran had called it Hamogre- 
garina balfourr. In this article he mentions having found 
apparently the same parasite ih the leucocytes of Mus decu- 
manus (EH. norvegicus) at Khartoum. Consequently I re- 
corded this finding as that of H. balfouri in the host £. 
norvegicus (Mus decumanus). Subsequent identifications 
of these rats by Mr. Oldfield Thomas, of the British Mu- 
seum, showed they were E. rattus (alexandrinus). Balfour’ 
later separated the rat parasite as Leucocytozoon muris 
(now Hepatozoon muris). It will be seen, from the list 
given above, that Fran¢a considers as separate species the 
Hepatozoa of H. norvegicus and of E. rattus, named H. 
muris and H. ratti respectively. As we later in Sydney 
found a Hepatozoon also in FE. norvegicus, it is possible that 
only one species really exists, for which the name H. muris 
(Balfour) would take precedence. If there are two species, 
then the one in Perth in E. rattuws would be Hepatozoon 
ratti;* that in Sydney in EL. norvegicus, H. muris. 
SARCOSPORIDIA.—The exact position of the Sarcosporidia 
in the Sporozoa is still a matter of doubt. Minchin’ classi- 
fies them as an order under the Neosporidia. Recently 
Crawley’ has produced reasons for considering them as 
1 Cleland, J. of Trop. Med. and Hyg., IX., 1906, p. 196; Aust. Assoc. 
Adv. Se., 1907, p. 516; Johnston and Cleland, Proc. Lanne ysoce 
IN So Wop UDO, 15 GxIal 
2 Balfour, J. of Trop. Med. and Hyg., March, 1906, p. 82 (same 
article, August 15th, 1905, p. 242). 
ae Sec. Rep. Wellcome Research Labs., Khartoum, 1906, 
pe c 
4 As suggested by me, Aust. Assoc. Adv. Science., Adel., 1907. 
> Minchin, An Introduction to the Study of the Protozoa, 1912. 
6 Crawley, Proc. Acad. Nat. Scien., Phil., June, 1916. 
‘ 
