NEMATOCYSTIS. 



63 



9. Nematoeystis stephensoni Bhatia & Setna. (Fig. 11.) 



■fNematocystis stephensoni, Bhatia & Setna, 1926, pp. 364—7, pis. xi, 

 xii, figs. 5-17 ; pi. xiii, figs. 28, 29. 

 Nematoeystis stephensoni, Bhatia, 1929, p. 125. 



Trophozoite of an elongate cylindrical form, short and 

 swollen or elongated and thin, with blunt extremities. Body 

 highly deformable, presenting a number of swellings and 

 constrictions. Epicyte shows fine longitudinal striations. 



Fig. 11. — Nematoeystis stephensoni Bh. & Set. 

 (After Bhatia and Setna.) 



Nucleus elliptical, with a single central karyosome, which 

 consists of a central deeply staining portion surrounded by a 

 vacuolated layer. Gametocysts oval. Gametocytes equal in 

 size ; gametes similar. 



Dimensions. — Trophozoite up to 1-26 mm. in length and 

 100 IX in thickness ; gametocysts from 153 [x by 100 jx to 314 [x 

 by 246 IX ; zygotes 8 [x ; sporocysts 15-5 fx by 8-1 fx. 



Eemarks. — In the living condition the parasite is quite 

 opaque and capable of contracting and elongating so rapidly 



