H^MOGREGARINA. 



123 



Frequently the young stages are in the form of a minute 

 vermicule bent upon itself, the Hmbs adhering in such a manner 

 that it is difficult to distinguish this form from the amoeboid. 

 Full-grown stage large, reniform, containing, besides the 

 nucleus, two large refringent ovoid granules, and occupying 

 a considerable extent of the surface of the corpuscle. The 

 vermicular stage is much smaller than the reniform stage 

 and does not extend beyond half the length of the corpuscle ; 

 it possesses a bulging end and a short drawn-out tail, bent 

 round on the swollen portion. 



Fig. 49. — Hsemogregarina laverani Simond. A, young amoeboid stage 

 with a nucleus ; B, young stage in which the cyanophil 

 grains are dispersed in the form of a coil ; C, young stage 

 in which the cyanophil nuclear substance is in the form of 

 a horseshoe ; D, young vermicular stage ; E, full-grown 

 stage folded upon itself and showing two refringent granules. 

 (From de Mello, after Simond.) 



Remarks. — The chief characteristic of the species is the 

 possession in most of the stages of two refringent granules, 

 which serve to distinguish this species from all others. 



Habitat. — Blood of Lissemys punctata granosa (Schoepff) : 

 United Provinces, Agra. 



49. Haemogregarinaleschenaultii Robertson. (Fig. 50.) 



■\Hsemogr6garina leschenaultii, Robertson, 1908, pp. 182, 184, figs. 4-7. 

 Hsemogregarina leschenaultii, Wenyon, 1926, pp. 1388. 



Hsemogregarine with two free motile forms, only present 

 in the blood : (1) slender free form with dense nucleus ; 

 no granules in the cytoplasm ; rather actively motile : 

 (2) broad, massive, granular form ; less active, period of move- 

 ment succeeded by period of rest. Two intra-corpuscular 

 forms also present : (1) long recurved form corresponding 

 exactly with the slender free form ; causes hypertrophy of 

 the corpuscle ; this is always the prevailing type in an in- 

 fection : (2) broad form with reticulate nucleus, growing 

 to a somewhat larger size ; never very numerous even in a good 

 infection. 



