SPOROZOA, GREGARINIDA 441 



Sporadins solitary 



Epimerite simple knob-like 



Cysts with several ducts Family 6 Leidyanidae (p. 445) 



Cysts without or with one duct 



Family 7 Monoductidae (p. 445) 



Epimerite not simple knob-like 

 Epimerite cup-shaped or digitate 



Epimerite cup-shaped . . . Family 8 Menosporidae (p. 448) 

 Epimerite digitate. . . .Family 9 Dactylophoridae (p. 448) 

 Epimerite otherwise 



Spore hat-shaped Family 10 Stylocephalidae (p. 450) 



Spore of other shapes 



Spore with spines. .Family 11 Acanthosporidae (p. 451) 



Spore without spines 



Family 12 Actinocephalidae (p. 452) 



Two host species involved Family 13 Porosporidae (p. 455) 



Family 1 Lecudinidae Kamm 



Epimerite simple, symmetrical; non-septate; spores ovoidal, 

 thickened at one pole; solitary; in gut of polychaetes and termites. 

 Undoubtedly intermediate forms between Acephalina and Cepha- 

 lina. 



Genus Lecudina Mingazzini. Epimerite simple, knob-like; in 

 polychaetes. 



L. pellucida (Kolliker) (Fig. 206, a). In Nereis cuUrifera and N. 

 heaucourdrayi; trophozoites ellipsoid; spores 7/z by 5/i. 



Genus Polyrhabdina Mingazzini. Trophozoites flattened, ovoidal; 

 epimerite with a corona of processes with split ends, deeply stain- 

 able; in polychaetes (Spionidae). 



P. spionis (Kolliker) (Fig. 206, b). In Scololepis fuligionosa; 100/i 

 by 35/i; epimerite with a corona of 8-10 processes; cysts (?). 



Genus Kofoidina Henry. Epimerite rudimentary; development 

 intracellular; 2-14 sporadins in association; cysts and spores un- 

 known. 



K. ovata H. In midgut of Zootermopsis angusticollis and Z. neva- 

 densis; syzygy 153-672^ long; sporadins 41-105/i long. 



Genus Sycia Leger. Epimerite knobbed, bordered by a thick ring; 

 protomerite subspherical; deutomerite conical, with navicular in- 

 clusions; in marine annelids. 



S. inspinata L. (Fig. 206, c). In Audouinia lamarcki. 



Genus Zygosoma Labbe, Trophozoites with wart-like projections; 

 epimerite a simple knob; spores oval; in gut of marine annelids. 



Z. globosum Noble (Fig. 206, d, e). Trophozoites 250-500/1 by 

 200-380/x; epimerite a large globule; cysts 400/i by 360^, without 



