MONODUCTUS. 109 



Dimensions. — Sporonts 819-975 ju, by 97-190 /x ; gametocysts 

 125-175^ by 95-125^. 



Eemarks. — Full observations have not yet been published, 

 and it is not certain that the form is distinct from other 

 previously known species. 



Habitat. — In the intestine of Scolopendra sp. : Bengal, 

 Calcutta. 



5. Family MONODUCTID^ Ray & Chakravarty, 



1933. 



Sporonts solitary. Epimerite a small elevation with prongs 

 attached to its base. Gametes dissimilar. Gametocysts 

 dehiscing by a single elongated spore-duct. Sporocysts 

 compressed, of broad spindle-shape, with median ridge on 

 dorsal surface. 



Genus MONODUCTUS Ray & Chakravarty, 1933. 

 Monoducttis, Ray & Chakravarty, 1933, p. 359. 

 With the characters of the family, 



42. Monoductus lunatus Ray & Chakravarty. (Fig. 42.) 



■\Monoductus lunatus, Ray & Chakravarty, 1933, pp. 352-60, pi. ii, 

 text-figs. 1-5. 



Young trophozoite intracellular. Full-grown trophozoite 

 elongate, widest shghtly behind the septum. Epimerite 

 knob-like, with twelve to sixteen stiff, radiating processes 

 attached to its neck. Protomerite more or less conical, 

 relatively very small, with an orifice at its anterior extremity, 

 through which longitudmal myonemes run connecting the 

 base of the epimerite with a raised disc-like platform arising 

 from the middle of the septum. There is a series of transverse 

 myonemes also, just underlying the pelhcle. Deutomerite 

 elongate, circular in transverse section, with circular myonemes 

 well developed, and with the cytoplasm usually packed with 

 granules, which give the organism an opaque yellowish-white 

 appearance. Nucleus contains a single spherical karyosome, 

 and is shaped like a parachute, a number of fibrils running 

 back from its posterior concave surface which vary the form 

 and position of the nucleus. Prior to association, sporonts 

 develop posterior pseudopodial processes hj which couphng 

 is effected. A thin transparent cyst is formed round the paired 

 gametoc3Ates. The spherical gametocysts are expelled with 

 the host's excreta and complete their development in three 



