329 



6. H. lacertarum ( — Karyolysus lacertamm) 

 (Fig. 72). — Found in the blood of Lacerta 

 agilts, L. miivalis,. and L. ocellata. 



The parasite has a more compact form 

 than some of the other haemogregarines. They 

 exert a marked action on the red cells, which 

 become much enlarged and anaemic, and, as 

 the name of the species implies, a disintegrating 

 action on the nucleus is one of its effects. The 

 nucleus is either pressed to the side or broken 

 up into fragments. 



P'^ff- 73- (i) H. mesnili, shewing characteristic looped Vermicule ; 



(2) H. laverani, shewing characteristic hooked Vermicule and 



tivo bright Granules {after Simond) ; 3 H. higemina 



in Blood of Blennies {after Minchin) 



The parasite in its endoglobular stage 

 becomes encysted, and is then called a cytocyst. 

 Further, it appears as if at this stage sexual 

 differences appeared, for some of these cysts- 

 divide up into about a dozen macromerozoits 

 (Fig. 72), while others divide up into twice 

 as many or more micromerozoits. Corresponding 

 to these we have free forms in the liver, twelve 

 by three m and eight by two m respectively. 

 According to wSchaudinn it is transmitted by 

 an Acarine. 



7. H. lacazei (= Haemocytosoon claratiifn). 



