392 PROTOZOOLOGY 



Epimerite digitate . . Family 9 Dactylophoridae (p. 398) 

 Epimerite otherwise 



Spore hat-shaped. . .Family 10 Stylocephalidae (p. 401) 

 Spore of other shapes 



Spore with spines 



Family 11 Acanthosporidae (p. 401) 



Spore without spines 



Family 12 Actinocephalidae (p. 403) 



Two host species involved Family 13 Porosporidae (p. 407) 



Family 1 Lecudinidae Kamm 



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

 thickened at one pole; solitary; in gut of polychaetes and ter- 

 mites. Undoubtedly intermediate forms between Acephalina and 

 Cephalina. 



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

 polychaetes. 



L. pellucida (Kolliker) (Fig. 179, a). In Nereis cultrifera and 

 N. beaucourdrayi ; trophozoites ellipsoid; spores 7m by 5/i. 



Genus Polyrhabdina Mingazzini. Trophozoites flattened, 

 ovoidal; epimerite with a corona of processes with split ends, 

 deeply stainable; in polychaetes, Spionidae. 



P. spionis (Kolliker) (Fig. 179, 6). In Scololepis fuligionosa; 

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



Genus Kofoidina Henry. Epimerite rudimentary; development 

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

 unknown. 



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

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



Genus Sycia Leger. Epimerite knobbed, bordered by a thick 

 ring; protomerite subspherical; deutomerite conical, with navic- 

 ular inclusions; in marine annelids. 



S. inspinata L. (Fig. 179, c). In Audouinia lamarcki. 



Genus Zygosoma Labbe. Trophozoites with wart-like pro- 

 jections; epimerite a simple knob; spores oval; in gut of marine 

 annelids. 



Z. glohosum Noble (Fig. 179, d, e). Trophozoites 250-500^ by 

 200-380/1 ; epimerite a large globule; cysts 400^ by 360^, without 

 ducts; spores oval, with 4 sporozoites, O/t by 7ju; reduction post- 

 zygotic, 6 chromosomes; in gut of Urechis caupo in California. 



Genus Ulivina Mingazzini. Elongate elhpsoid; epimerite simple, 

 spores unknown; in gut of polychaetes. 



