224 



SPOROZOA. 



outline, stained clear, almost white ; pigment dark-brown, 

 granules, showing a tendency to collect at the poles. 



Habitat. — Blood of the yellow- cheeked tit, Machlolophus 

 xanthogenys (Vigors) : from India, in the Zoological Gardens, 

 London ; also from Portuguese India, Siroda (Ponda). 



159. Hsemoproteus metchnikovi (Simond). 



(Fig. 112.) 



150-2; 19016, 



■^Hsemamoeba metchnikovi, Simond, 1901 a, pp. 



pp. 338-43, pi. viii, figs. 1-20. 

 Hsemocystidium metchnikovi, Castellani & Willey, 1905, pp. 84—5 ; 

 Castellani & Chalmers, 1919, p. 516 ; Wenyon, 1926, pp. 899, 

 901, 1396 ; Knowles, 1928, p. 378 ; Reichenow, 1929, p. 978 ; 

 Coatney, 1936, p. 89. 



Gametocytes rarely exceeding half the blood- corpuscle in 

 size, with a small number of pigment granules, and not causing 



Eig. 112. — Hsemoproteus metchnikovi (Simond). A, tailed non-pig- 

 mented form ; B, large non-pigmented vermicule form ; 

 C, young pigmented form ; D, female gametocyte ; E, female 

 gametocyte and male gametocyte in the same corpuscle ; 



F, fully developed female gametocyte showing nucleus ; 



G, leucocyte from the spleen showing two female and 

 one male gametocytes; H, leucocyte from the lung showing 

 male gametocyte. (After Simond.) 



a displacement of the nucleus or distortion of the corpuscle. 

 In some cases a blunt prolongation of the parasite extends 

 up the side of the nucleus, but typical halteridia forms are 

 not seen. Male gametocytes faintly staining, containing 

 larger nucleus and coarse irregularly distributed pigment ; 

 female gametocytes deeply staining, containing smaller nucleus 

 and finer pigment. Sometimes two gametocytes are found 

 in the same corpuscle. 



Dimensions. — Gametocytes 6-10 /a in diameter. 



