PROTOZOA WITHOUT MOTILE ORGANS 59 



nierite; they are covered by a fur-like fringe of processes resemblino; cilia. 



The spores are unknown. Type species, C. phronimte, Frenz., from the gut 



of Phronima sedentaria. 

 Genus 17. Ancora, Labile, 1S90. The trophozoite has a peculiar anchor-like 



form by reason of two lateral bulgings of the body. Spores unknown. Species, 



A. sagittata, Leuck, from the gut of Capitella capitata. 

 Other genera provisionally placed here are: Pleurozyga, Mingazzini, 1891, from 



ascidians; Ophioidina, Mingazzini, 1891, from Bonellia; Kollikerella, 



Labbe, 1899, from Staurocephalus; Lobianchella, INIingazzini, 1891, from 



Alciope. 

 Tribe II. Cephalinw, Delage. Eugregarines possessing an epimerite at some 



stage of the life history, either in the adult phase or in the temporary young 



phases. The body is usually divided by a septum into protomerite and 



deutomerite, and the trophozoites are frequently associated in couples 



arranged tandem, each couple consisting of primite and satellite. The tribe 



consists mainly of parasites of the gut of various forms of arthropods. 

 Legion A. Gymnosporea, Leger. The sporoblast mother cells give rise directly 



to sporozoites which do not form in sporocysts or specially i)rotected sporo- 



l)lasts. 

 Family 1. Aggregatida', Labbe. With sporozoites grouped irregularly about a 



number of residual masses. 

 Genus 18. Aggrcgata, Frenzel, 188-3. With the characteristics of the family. 



Several species from various crustacean hosts. 

 Family 2. PorosporiJw, Labbe. Special centres of sporozoite formation are 



present (sporoblast centres), but they lack the protective sporocysts. 

 Genus 19. Porospora, A. Schn., 1875. Trophozoite with small V)utton-like epi- 

 merite; cells very large (u{) to IG mm.) and usually solitary. One species, 



P. gigantea, Van Beneden, from gut of the lobster. 

 Legion B. Angiosporea, Leger. The sporocysts are well developed and usually 



double coated to form endospore and epispore. 

 Family 3. Gregarinidae, Labbe. Trophozoites with simple epimerites; sporo- 

 cysts with or without sporoducts. Spores oval or barrel-shaped, and united in 



strings in species with sporoducts. 

 Genus 20. Gregarina, Dufour, 1S2S. Cysts with s])oroducts; epimerite small, 



conical, or knobbed (see Fig. 81, p. 191). Many species widely distributed in 



digestive tracts of various insects. 

 Genus 21. Gamocydia, Leger, 1892. The trophozoite has a temporary epimerite. 



Cyst with sporoducts. Spores cylindrical and elongated. From gut of cock- 

 roach and other insects. 

 Genus 22. Eicrmocydis, Leger, 1892. The sporonts unite to form aggregates of 



several individuals. The spores are ellipsoidal. Cysts without sporoducts. 



One sjx'cics, K. polymor])ha, Leger. from the gut of insects. 

 Genus 23. Ilyalu.^pora, A. Schn., 187.'). Cysts without sporoducts. Spores 



pointed at each end and bulging in middle. Gut of Petrobius sp. 

 Genus 24. Kuspora, A. Schn., l.S7o. S|)ores prismatic, cysts without sporoducts. 



One species, E. falla.x, from gut of Rhizotrogus estivus. 

 Genus 25. Spherocystis, Leger, 1892. Body spherical, protomerite temporary, 



cysts without sporoducts, spores oval. One .species, S. simplex, Leger, from 



the gut of Xy|)hon pallidus larva. 

 Genus 26. Cnemidospora, A. Schn., 1882. The epimerite is large and lancet- 



shape<l; sporonts solitary with globular protomerites. No sporoducts. 



Spores ellipsoidal, with thick spore cysts. One species, C. lutea, A. Schn., 



from the gut of Glonieris. 

 Genus 27. SfcHopliora, Lal)b(', 1899. Sporonts large, with small jirotomeritc. 



Cyst without sporoducts: s|)orcs fusiform with dark sutural line. One 



species, S. juli, Franz, from gut of species of millipedes. 



