SPOROZOA, GREGARINIDA 543 



L. pellucida (Kolliker) (Fig. 232, a). In Nereis cultrifera and N. 

 beaucourdrayi ; trophozoites ellipsoid; spores 7/i by 5/i (Ellis, 1913). 



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. 232, b). In Scololepis fuligionosa; 100/* 

 by 35/t; epimerite with a corona of 8-10 processes; cysts unknown. 

 Mackinnon and Ray (1931) report var. bifurcata, the epimerite of 

 which is a "knob-shaped structure with a circlet of 14 to 16 minute 

 teeth at its base, and at its crown, two much larger, diverging, claw- 

 like processes." 



Genus Kofoidina Henry. Epimerite rudimentary; development 

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

 known (Henry, 1933). 



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

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



Genus Sycia L£ger. Epimerite knobbed, bordered by a thick ring; 

 protomerite subspherical ; deutomerite conical, with navicular in- 

 clusions; in marine annelids (Leger, 1892). 



S. inspinata L. (Fig. 232, 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. 232, d, e). Trophozoites 250-500/t by 

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

 ducts; spores oval, with 4 sporozoites, 9/i by 7/i; reduction zygotic, 

 12 to 6 chromosomes; in gut of Urechis caupo in California. 



Genus Ulivina Mingazzini. Elongate ellipsoid; epimerite simple; 

 spores unknown; in gut of polychaetes. 



U. rhynchoboli (Crawley). Sporadins up to 700 /i long; in the gut of 

 Rhynchobolus americanus (Crawley, 1903). 



Family 2 Cephaloidophoridae Kamm 



Development intracellular; early association; cysts without spo- 

 roducts; spores ovoidal, with equatorial line; in gut of Crustacea. 



Genus Cephaloidophora Mawrodiadi. Sporadins biassociative, 

 early; epimerite rudimentary; cysts without sporoducts; spores in 

 chain, ovoidal. 



C. olivia (Watson) (Fig. 232/,). Biassociated sporadins up to 218/t 

 long; individuals up to 118/i by 36/t; cysts spheroidal, 60/t in diame- 

 ter; spores (?) ; in gut of Libinia dubia; Long Island. 



C. nigrofusca (Watson). Sporadins, ovoid to rectangular, up to 

 125/i by 75/x; cysts and spores (?); in gut of Uca pugnax and U. 

 pugilator. 



