146 



SPOEOZOA. 



contains numerous sporocysts, all of which produce numerous 

 sporozoites. 



The genus was founded by Miller for a parasite of the leuco- 

 cytes of rats, which had been previously referred to the genera 

 Hsemogregarina or Leucocytozoon. 



84. Hepatozoon adiei Hoare. (Fig. 66.) 



"fHepatozoon adiei, Hoare, 1924, pp. 63-6, 1 pi. 

 Hepatozoon adiei, Wenyon, 1926, pp. 1086, 1095, fig. 456 ; Reiche- 

 now, 1929, p. 923. 



Schizonts more or less regularly ovoid. Nuclear multiplica- 

 tion gives rise to 12 to 24 nuclei. Merozoites elongate and 

 vermiform. Younger schizonts enclosed in definite cells, 



B 



c 



IFig. 66. — Hepatozoon adiei Hoare. A, B, ovoid schizonts ; C, schizont 

 showing formation of merozoites ; D, rod-like gametocyte 

 enclosed in a leucocyte. A-C, in the smears of the lung ; 

 D, in the peripheral blood. (After Hoare.) 



probably endothelial cells of the capillaries. In later stages, 

 host-cell reduced to a thin membrane with the flattened 

 nucleus at one side of it. Gametocytes rod-Hke, rounded 

 at both extremities ; nucleus usually terminal in position. 

 The gametocyte either displaces or is wedged in the leucocyte 

 nucleus. 



Dimensions. — Schizonts from 8/x by 4-8 /u- to 20-8 /x by 11-2)li ; 

 gametocytes 8-5 /x by 4-5 /x. 



Remarks. — Only dried films of the blood and smears of the 

 internal organs of the bird were available for study. The 

 schizonts were found in smears of the lung, and the gametocytes 

 in the leucocytes of the peripheral blood. The schizonts and 



