226 SPOEOZOA. 



schizogony cycle is particularly simple. The merozoites remain 

 free among the blood-corpuscles or the cells of the host-tissue. 

 Sections of lungs and spleen also show schizonts withia the 

 red corpuscles and free merozoites among them. In the blood 

 the red corpuscles show halteridia or reniform gametocytes. 

 Female gametocyte stained deep blue with Leishman's stain ; 

 cytoplasm finely vacuolated ; nucleus eUiptical ; pigment 

 granules deep brown and slightly larger than in the male, 

 Male gametocyte stained Hght blue ; nucleus granular ; 

 pigment granules finer. Gametocytes may become extra- 

 cellular and free in the plasma, and assume an oval or rounded 

 form. 



Dimensions. — Gametocytes 6-8 jtt by 2'5-3/x ; infected cor- 

 puscles 8-9 ju, by 4-4-5 /x. 



Remarks. — ^When the gametocytes are full grown the para- 

 sitized corpuscles become hypertrophied, decolorized, and 

 sometimes reduced to a thin border roimd the parasite. The 

 nucleus of the corpuscle is dislocated to the periphery, and 

 finally disappears. 



Habitat. — Peripheral blood and sections of the lung and the 

 spleen of Leptocoma zeylonica (Linn.) : Portuguese India, 

 Nova Goa. 



162. HsBmoproteus rileyi Malkani. (Fig. 114). 



'^Hsemoproteus rileyi, Malkani, 1936, pp. 155-7, pi. iv. 



Gametocytes show a variety of form, such as rings, pear- 

 shaped or elongate forms, spindles, boomerangs, and typical 



Fig. 114. — Haemoproteiis rileyi MsAak.axii. (After Malakani.) 



halteridia encirchng the nucleus of the infected red blood- 

 corpuscles. Male gametocytes stained a pale blue with 

 Leishman's stain ; nucleus central, large, consisting of a number 

 of chromatin granules stained intensely red enclosed by a mem- 

 brane ; brownish-black pigment granules collected together. 

 Female gametocytes stained more deeply and the nucleus 

 not granular but compact. The number of gametocytes in 

 each corpuscle varied from one to four. In some there was 

 a mature gametocyte on each side of the nucleus, both of the 

 same sex or opposite sexes, No schizonts could be seen in 

 the blood. 



