123 SPOROZOA. 



to the other pole of the body. The nucleus is nearly always 

 found near the zone of separation of the two parts, and 

 contains irregularly dispersed chromatin particles. The body 

 is more or less filled with metachromatic granules. The 

 parasitized corpuscles become hypertrophied, measuring 20- 

 25 fi, whereas the normal corpuscles measure 16-1 8 ju,. (2) The 

 reniform or bean-shaped forms are found in very much smaller 

 numbers than the vermicular ones. The nucleus is rounded 

 and central, but may sometimes be situated close to one of the 

 poles ; it contains chromatin granules or rods. The cyto- 

 plasmic constitution is also different from that of the vermicular 

 form. In one of the poles there are two or more vacuoles ; 

 there may be vacuoles, but fewer, in the other pole also. The 

 parasitized corpuscle is hypertrophied, but is enlarged in its 

 width rather than in its length, measuring 17-18;u, by 14-16/x. 

 Schizogony takes place in the hver, and is of two types, 

 resulting in large and small merozoites. Cysts are found 

 in the liver of the host ; they are rounded, with a thick 

 membrane, and contain 8 rounded or falciform merozoites. 

 The free merozoites are generally found in pairs. In sections 

 of the Hver the cysts containing 8 merozoites are not en- 

 countered, but larger merozoites, 12-16/x in size, occur singly, 

 or in groups in 2, 4, 8 or larger numbers. 



Dimensions. — Vermicular form 17-22 fju, reniform type 

 8-12 ju, ; cysts, diameter 18-20/^ ; merozoites 6-8 fx or 12-16|U,. 



Remarks. — This species is recognizable from H. laverani 

 by the young stages not being amoeboid and the vacuoles 

 being inconstant in number and occurring at one or both 

 poles of the reniform stages ; the vermicular stage also differs 

 in being larger than the reniform stages, in occupying nearly 

 the whole of the corpuscle, and in having a tail nearly as long 

 as the body of the parasite. The species resembles H. vittatss 

 in possessing cysts with 8 merozoites, but in H. malabarica 

 the cysts are regularly spherical, whereas in H. vittatee they 

 are navicular and the reniform stages of that species contain 

 so-called plastids. Schizogony in the lungs or in the blood 

 does not occur in this species, though it is known to take place 

 in others. 



The species also somewhat resembles H. nicorise, but is 

 clearly marked off from it by the non-existence of a clear pole, 

 the chromatic granules filling completely the opposite pole, 

 the tail being closely applied to the body, the vermicular 

 forms being larger and more abundant than the bean-shaped 

 forms, and by the chromatoid granules filling up the cyto- 

 plasm. 



Habitat. — Blood, liver, bone-marrow and other viscera of 

 the Indian tortoise, Lissemys punctata granosa (Schoepff) : 

 Portuguese India, Nova Goa. 



