SPOROZOA, GREGARINIDA 



533 



grown trophozoites 250-800^ in diameter; whitish to naked eyes; 

 pellicle thickly covered by 10-15/x long 'hairs'; endoplasm packed 

 with spherical paraglycogen grains (3m in diameter), nucleus 35- 

 43m in diameter; cysts 400-800m in diameter; spores 19m by 8.6m 

 (Troisi, 1933). 



A. minuta Troisi (Fig. 227, g). In seminal vesicles of Lumbricus 

 terrestris, L. castaneus and L. rubellus; mature trophozoites 40- 

 46m in diameter; endoplasm yellowish brown, packed with spherical 

 paraglycogen grains (5.3-7m in diameter); nucleus 10m in diameter; 

 cysts 68-74m by 55-65m; spores of 3 sizes, 11m by 5.5m, 18.8m by 7m 

 and 21.6m by 9.8m. 



Genus Nematocystis Hesse. Trophozoites elongate, cylindrical 

 and shaped like a nematode; solitary. Many species^/ Bhatia*and 

 Chatterjee, 1925). 



Fig. 228. Monocystis rostrata (Mulsow). a-c, tropho- 

 zoites, X90; d, spore, X850. 



N. vermicularis H. (Fig. 227, h). In seminal vesicles of Lumbricus 

 terrestris, L. rubellus, Helodrilus longus, Pheretima barbadensis; 

 trophozoites 1 mm. by 100m; cylindrical, both ends with projections; 

 nucleus oval; endoplasm alveolated, with paraglycogen grains; 

 sporadins become paired lengthwise; cysts and spores unknown. 



Genus Rhabdocystis Boldt. Trophozoites elongate, gently curved; 

 anterior end swollen, club-shaped; posterior end attenuated; spores 

 with sharply pointed ends. One species. 



R. claviformis B. (Fig. 227, i, j). In seminal vesicles of Octolasium 

 complanatum; sporadins extended, up to 300m by 30m; pellicle dis- 

 tinctly longitudinally striated; zooamylon bodies 2-4m in diameter; 

 cysts biscuit-form, 110m by 70m; spores 16m by 8m- 



Genus Enterocystis Zwetkow. Early stages of trophozoites in 

 syzygy; sporadins in association ensiform; cysts spherical without 

 ducts; spores elongate ovoid, with 8 sporozoites; in gut of ephemerid 

 larvae. Species (Noble, 1938a). 



