Ii 4 SOME MINUTE ANIMAL PARASITES 



character to the gametocytes. Its nucleus divides 

 into a number of parts (Fig. 25, C) and gradually 

 eight to fourteen small merozoites (Fig. 25, D-F) 

 are formed within it, and are ultimately discharged 

 into the blood, where they penetrate new host cells 

 (Fig. 26). It is probable that the bone-marrow of the 

 host also would show similar stages of the parasites. 

 There are many Leucocytozoa in different birds, and 

 the means whereby infection is brought about is 



FIG. 26 YOUNG FORM OF LEUCOCYTOZOON LOVATI THAT HAS 

 RECENTLY PENETRATED ITS HOST CELL AND HAS DISPLACED 

 THE NUCLEUS TO ONE SIDE 



little known. It is possible that the grouse-fly, 

 Ornithomyia lagopodis, transmits Leucocytozoon lovati 

 of the grouse, but the experimental work is still 

 in progress. 



Tortoises, snakes, lizards, and amphibia, as well as 

 some mammals such as squirrels and mice, harbour 

 blood - parasites somewhat resembling the Leuco- 

 cytozoa of birds, but space prevents giving any more 

 details of them in the present work. 



There is, however, much importance attaching to 

 the study of the life-histories of the parasites of lowly 

 organisms, and the value of such study is perhaps 



