OBSERVATIONS ON HAEMATOZOA IN CBRYLON. 387 
In all the adults of this species examined by Dr. Simond, 
more than twenty in number, he observed the pigmented 
stages of the Heematozoon, and, in addition, he found non- 
pigmented parasites of the Heemogregarine type in constant 
association with the pigmented Hemameeboids. 
On this account, as well as from analogy and in view of the 
known fact that it is impossible to recognise sexual differences 
among true Hemogregarines, whereas such differences are 
clear among the Hzmameeboids, Dr. Simond inclined to the 
opinion that the two forms of endoglobular parasites observed 
by him belonged to one cycle of development. 
With regard to the life-history and mode of transmission 
of these parasites, the author points out that experiments in 
inoculation have hitherto proved futile, and the only method 
of dealing with them at present is the morphological method. 
The scavenging activity of the tortoise Chitra indica! 
is of some interest in view of the remarks which we have 
made above and of some which are to follow. 
Referring to Dr. Simond’s discoveries, Professor HE. A. 
Minchin makes the following comment in his work on the 
Sporozoa in Professor Lankester’s ‘Treatise on Zoology,’ 
19038, p. 270: 
Hemamceba metschnikovi “occurs as a minute pig- 
mented endoglobular amcebula resembling the malarial para- 
sites of birds and mammals. Its presence in a cold-blooded 
animal is, therefore, remarkable and quite exceptional. 
Further investigations of this interesting form are required, 
and Laveran admits it only with some reserve to rank in his 
genus Hemameba.” 
In the blood of a tree-dwelling gecko, Hemidactylus 
leschenaultii, taken at the village of Mamadu, near Vavu- 
niya, in the Northern Province of Ceylon in April, 1904, we 
observed a pigmented endoglobular parasite which did not 
appear to fall within the definition of any hitherto described 
1This is the name by which the tortoise is designated by Mr. G. A. 
Boulenger in the volume on “ Reptilia and Batrachia” in the ‘ Fauna of Brit. 
India,’ 1890, p. 16. 
