396 PROTOZOOLOGY 



U. cuenoti M. 2-4 sporadins in syzygy; individuals up to 

 700)Li long; cysts ovoid, 44/i long; spores 4/i in diameter; in gut of 

 A tyaeph rya dcsm arcsti. 



Genus Pyxinoides Tregouboff. Sporadins biassociative; epi- 

 merite with 16 longitudinal furrows, small cone at end. 



P. halani (Kolliker). Primite up to ISO^t; satellite 60^t long; 

 in gut of Balanus amphitrite and B. eburneus. 



Genus Anisolobus Vincent. Sporadins in syzygy; epimerite 

 lacking in cephalins; protomerite of primite expanded to form 

 sucker-like organella; cysts ellipsoid, with thick envelope; with 

 6-8 sporoducts; spores barrel-shaped. One species. 



A. dacnecola V. (Fig. 180, c). In midgut of Dacne rufifrons; 

 2 sporadins in syzygy lOO-SOO^i by 20-50ju; cysts without 

 envelope, 130-150m by 80-90/i; sporoducts 40-50/^ long; spores in 

 chain, dolioform, 6m by 4/^. 



Genus Carcinoectes Ball. Sporadins in syzygy of 2 or more in- 

 dividuals; epimerite rudimentary, cysts without sporoducts; 

 spores round to ovoidal, not in chain; in gut of Crustacea. 



C. hesperus B. (Fig. 180, d, e). 2-6 sporadins in association; 

 sporadins up to 320/i by 9^; cysts about 140^ by 123m, attached 

 to the wall of hindgut; spores 8.6m by 7.7m, with 8 radially ar- 

 ranged sporozoites; in gut of Pachygrapsus crassipes in California. 



Family 6 Leidyanidae 



Similar to the last two families; but sporadins are solitary and 

 epimerite simple knob-like; cysts with several sporoducts. 



Genus Leidyana Watson. Solitary; epimerite a simple globular 

 sessile knob; cysts with ducts; spores dolioform. 



L. erratica (Crawley) (Fig. 180, /). Sporadins up to 500m by 

 160m; cysts about 350m in diameter; membrane about 30m thick; 

 1-12 sporoducts; spores extruded in chains, 6m by 3m; in gut of 

 Gryllus abhreviatus and G. pennsylvanicus. 



Family 7 Monoductidae Ray et Chakravatry 



As in the last family solitary; but cyst with a single sporoduct 

 or none; spore with 8 sporozoites. 



Genus Monoductus R. et C. Sporadins solitary; epimerite a 

 small elevation with prongs attached to its base; anisogamy; 

 cyst with a single sporoduct; spores flattened fusiform, with 

 dissimilar ends, each with 8 sporozoites. One species. 



