MONOCYSTIS. 57 



rapid in-pouring of the paramylon grains into it, and the 

 swelhng gradually disappears, to be formed again ; the 

 parasite now assumes a rounded shape, with or without 

 a narrow process at one or both ends. Nucleus spherical, 

 with a large central karyosome. Gametocyst spherical, with 

 hemispherical or irregularly oval gametocytes. Sporocysts 

 typical. 



Dimensions. — Trophozoite 100-150 /i in length and 30-40 /x 

 in width ; gametocysts 80-100 ju, in diameter ; sporocysts 

 12-5 /x in length. 



Remarks. — Dr. K. N. Bahl sent me some preparations of the 

 contents of the seminal vesicles of EutypTiseus sp. In these 

 are a large number of trophozoites and other stages of a Mono- 

 cystid referable to M. beddardi Ghosh, There are, in addition, 

 numerous specimens referable to DirJiynchocystis globosa 

 (Bhatia & Chatterjee). Ghosh in his description of Jf . beddardi 

 describes the parasite as assuming a rounded shape, with or 

 without a narrow process at one or both ends. It is possible 

 that he found specimens of D. globosa occurring along with 

 M. beddardi and considered them merely as contracted stages 

 of the latter. But the processes in Dirhynchocystis are clearly 

 marked off from the body, and not as represented by Ghosh 

 in his figs. 12 and 13. 



Habitat. — Seminal vesicles of Eutyphoeus nicholsoni 

 (Beddard) : Bengal, Calcutta ; Eutyphoeus sp. : United 

 Provinces, Lucknow. 



2. Monocystis bengalensis Ghosh. (Fig. 5.) 



■\Monocystis bengalensis, Ghosh, 1923, pp. 423-5, figs. 1-7. 

 Monocystis bengalensis, Bhatia, 1929, p. 123. 



Trophozoites oval when young, later elongated and club- 

 shaped. Anterior end wide and rounded. Posterior end 



B. 



Fig. 5. — Monocystis bengalensis Ghosh. A, trophozoite ; B, cyst 

 with two sporonts. (After Ghosh.) 



narrow and rounded. Surface smooth. Ectoplasm very thin. 

 Myonemes barely visible in stained specimens. Endoplasm 

 highly granular, with large irregular-shaped paramylon 

 grains. Nucleus rounded, with a large irregular karyosome, 



