178 SOME MINUTE ANIMAL PARASITES 



and the two individuals are thus separated (Fig. 36, D). 

 Then, as a rule they either force their way out or the 

 corpuscle bursts and liberates them into the blood- 

 stream, where they at once enter other corpuscles 

 and recommence their cycle. Occasionally, division 

 of the daughter forms recommences in the same host 



FIG. 36 DIVISION OF BABESIA BOVIS BY CHROMATIN FORKING 



A, Form about to divide ; B, two small buds formed, chromatin Y- 

 shaped ; C, more advanced stage ; D, daughter forms about to 

 separate 



cell, and consequently four, six, eight, and more 

 parasites occur within one corpuscle. It is rare for 

 two parasites to invade the same host cell, though 

 it has been known. Another interesting feature is 

 that one amoeboid parasite may divide into two, and 

 then each of the two give rise to two pyriform 

 organisms. Should rounded or imperfectly divided 



