536 PROTOZOOLOGY 



Genus Aikinetocystis Gates. Trophozoites cylindrical or columnar, 

 with a characteristic, regular dichotomous branching at attached 

 end, with sucker-like bodies borne on ultimate branches; solitary or 

 2 (3-8) individuals in association; spores biconical. 



A. singularis G. (Fig. 229, g, h). In coelom of Eutyphoeus foveatus. 

 E. rarus, E. peguanus and E. spinulosus (of Burma) ; trophozoites up 

 to 4 mm. long; number of branches 8 or 16, each with an irregular 

 sucker; ovoid nucleus near rounded end; spores of two sizes, 20-23m 

 long and 7-8m long; a few cysts found, ovoid and about 600m long. 



Family 5 Stomatophoridae Bhatia 



Trophozoites spherical to cylindrical or cup-shaped ; with a sucker- 

 like epimerite; solitary; spores navicular, ends truncate; 8 sporo- 

 zoites; in seminal vesicles of Pheretima (Oligochaeta) . 



Genus Stomatophora Drzewecki. Trophozoites spherical or ovoid: 

 anterior end with a sucker-like epimeritic organella with a central 

 spine; spores navicular. Several species. 



S. coronata (Hesse) (Fig. 229, i-k). In seminal vesicles of Phere- 

 tima rodericensis, P. hawayana and P. barbadensis; trophozoites 

 spherical, ovoid or elliptical, about 180m by 130m; endoplasm with 

 ovoid paraglycogen grains; cysts ellipsoid or fusiform, 70-80 m by 

 50-60m; spores in 2 sizes, 11m by 6m and 7m by 3m and in chain. 



Genus Astrocystella Martiis. Trophozoites solitary; stellate with 

 5-9 lobes radiating from central part containing nucleus; anterior 

 surface with a depression. One species. 



A. lobosa M. (Fig. 229, I). In seminal vesicles of Pheretima beau- 

 fortii (New Guinea) ; diameter about 200m; spores fusiform. 



Genus Craterocystis M. Trophozoites solitary; rounded; a sucker- 

 like depression on anterior end; myonemes well developed, running 

 from concave to convex side. One species. 



C. papua M. (Fig. 229, m). In prostate and lymphatic glands of 

 Pheretima wendessiana (New Guinea); trophozoites about 360- 

 390m in diameter. 



Genus Choanocystella M. (Choanocystis M.). Trophozoites soli- 

 tary; rounded or ovate; anterior end with a mobile sucker and a 

 tentacle bearing cytoplasmic hairs; myonemes. One species. 



C. tentaculata M. (Fig. 229, n). In seminal vesicles of Pheretima 

 beaufortii (New Guinea) ; trophozoites 50m by 36m- 



Genus Choanocystoides M. Trophozoites solitary, rounded or cup- 

 shaped; anterior end with a mobile sucker, bordered by cytoplasmic 

 filaments. One species. 



C. costaricensis M. (Fig. 229, o). In seminal vesicles of Pheretima 



