H^MOGREGARINA. 



127 



52, HsBmogregarina mesnili Simond. (Fig. 53.) 



1901a, pp. 150-2; 1901 e, 

 1919, p. 487; 



"fHcemogregarina mesnili, Simond, 

 pp. 322-7, fig. 1. 

 Hsemogregarina mesnili, Castellani & Chalmers, 

 Wenyon, 1926, p. 1395, 



The young stages are amoeboid. The older stages may be 

 either vermicular with a distinct horn -like prolongation bent 

 upon the main body, oval or reniform, slender and doubled, 

 or folded into three parts. The nucleus may be fragmented 

 or compact. 



Dimensions. — In the folded forms the total length of the 

 parasite may exceed 30 /a. 



ABODE F 



Fig. 53, — Hsemogregarina mesnili Simond, A, young amoeboid stage ; 

 B, horned vermicular stage, showing two nuclei ; G, adult 

 reniform stage with colourless granules ; D, vermicular 

 stage, with two equal limbs ; E, very long vermicular stage, 

 folded twice over, with three limbs interlacing together ; 

 F, fragmentation of a schizont, with free merozoites. (After 

 Simond.) 



Remarks. — The young amoeboid forms measure 3-6 ^a in 

 length and contain a fragmented nucleus. The horned vermi- 

 cule stage recalls the appearance of Hsemoproteus metchnikowi, 

 described by the same author from Chitra indica. The reni- 

 form individuals are often seen to be filled with refringent 

 colourless granules. The elongate vermicular forms are 

 uniform in diameter throughout the greater part of their length, 

 and are folded into two equal limbs, or in the largest individuals 

 folded twice over, the three limbs interlacing like a figure of 8 , 

 a characteristic not met with in other species. 



Habitat.— Blood of Kachuga tectum (Gray) : United 

 Pkovincbs, Jumna River. 



53. Hsemogregarina mirabilis Castellani & Willey, (Fig. 54.) 



^Hsemogregarina mirabilis, Castellani & Willey, 1904, pp. 86-90,. 



figs. 28-38 ; Patton, 1908, p. 318. 

 Hsemogregarina mirabilis, Dobell, 1908, p. 294, 

 ■^Hsemogregarina jnirabilis, Plimmer, 1913, p. 149. 

 Hsemogregarina mirabilis, Castellani & Chalmers, 1919, p, 487, 

 fig. 153 ; Wenyon, 1926, p. 1394. 

 •\Hsemogregarina mirabilis, Scott, 1926, p. 236. 



Form elongate, thick, Gregarine-like and bent ; cytoplasm 



