PROTOZOA WITHOUT MOTILE ORGANS 59 



merite; they are covered by a fur-like fringe of processes resembling cilia. 

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

 of Phronima sedentaria. 



Genus 17. Ancora, Labb(5, 1899. 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; KoUikerella, 

 Labb^, 1899, from Staurocephalus; Lobianchella, Mingazzini, 1891, from 

 Alciope. 



Tribe II. Cephalince, 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 protected sporo- 

 blasts. 



Family 1. Aggregatidcn, Labbe. With sporozoites grouped irregularly about a 

 number of residual masses. 



Genus 18. Aggretjata, Frenzel, 1885. With the characteristics of the family. 

 Several species from various crustacean hosts. 



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

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



Genus 19. Porospora, A. Schn., 187.5. Trophozoite with small button-like epi- 

 merite; cells very large (up to 16 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. Gregarinidw, 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, 1828. Cysts with sporoducts; epimerite small, 

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

 digestive tracts of various insects. 



Genus 21. GmnocystU, 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. Eiermocystis, Leger, 1892. The sporonts unite to form aggregates of 

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

 One species, E. polymorpha, Leger, from the gut of insects. 



Genus 23. Hyalospora, A. Schn., lS75. Cysts without sporoducts. Spores 

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



Genus 24. Euspora, A. Schn., 187.5. Spores prismatic, cysts without sporoducts. 

 One species, E. fallax, from gut of Rhizotrogus estivus. 



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

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

 the gut of Xyphon pajlidus larva. 



Genus 26. Cnemidospora, A. Schn., 1SS2. The epimerite is large and lancet- 

 shaped; sporonts solitary with globular protomerites. No sporoducts. 

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

 from the gut of Glomeris. 



Genus 27. Stenophora, Labb^, 1899. Sporonts large, with small protomerite. 

 Cyst without sporoducts: spores fusiform with dark sutural line. One 

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



