1 68 THE PROTOZOA 



simple or lobed and symmetrical. The cysts open by simple dehiscence. The 

 spores are boat-shaped, bi-conical, or cylindro-conical. Genera: Sciadiophora 

 Labbe" ('99) ; Antlwrhynchus Labbe" ('99) ; Pileocephalits A. Schn. ('75) ; 

 Amphoroides Labbe" ('99); Discorhynchus Labbe ('99); Stictospora Le"ger 

 ('93) ; Schneideria Le"ger ('92) ; Asterophora Le"ger ('92) ; Stephanophora 

 L(?ger ('92) ; Bothriopsis A. Schn. ('75) Coleorhynchus Labbe" ('99) ; Actino- 

 cephalns Stein ('48) ; Pyxinia Hammerschmidt ('38) ; Legeria Labbe" ('99) ; 

 Phialoides Labbe" ('99) ; Beloides Labbe" ('99). 



Family 5. Acanthosporidae. Solitary. The spores are provided with equatorial 

 or polar spines. Genera: Corycella Le"ger ('92); Acanthospora Le"ger ('92); 

 Ancyrophora Leger ('92); Cometoides Labbe" ('99). 



Family 6. Menosporidae. Solitary. The epimerite is on a long neck. The spores 

 are crescent-shaped. Genera: Menospora Le"ger ('92); Hoplorhynchus Carus 

 ('63). 



Family 7. Stylorhynchidze. The spores are formed in chains, and the cysts have a 

 double envelope. Genera : Lophocephalus Labbe ("99) ; Cystocephalus A. Schn. 

 ('86) ; Oocephalus A. Schn. ('86) ; Sphcerorhynchus Labbe" ('99) ; Stylorhyn- 

 chus Stein ('48). 



Family 8. Doliocystidae. Cephalina without septa dividing the cell into protomerite 

 and deutomerite, but consisting of a single chamber with epimerite. Genera : 

 Doliocystis Le"ger ('93). 



Suborder 2. ACEPHALINA. Gregarinida consisting of a single chamber, and with- 

 out epimerite. They are parasites in the body cavity or cavities of the various 

 organs of different animals. Genera : Monocystis Stein ('48) ; Zygocystis 

 Stein ('48) ; Zygosoma Labb ('99) ; Pterospora Racovitza and Labbe ('96) ; 

 Cystobia Mingazzini ('91); Lilhocystis Giard ('76); Ceratospora Le"ger ('92) ; 

 Urospora A. Schn. ('75); Gonospora A. Schn. ('75); Syncystis A. Schn. 

 086). 



Order 2. COCCIDIIDA. Telosporidia having a spherical or oval form, without a free 

 and motile adult stage, and never amoeboid. Sporulation takes place within 

 cysts formed while the organism is an intra-cellular parasite. 



Family i. Disporocystidae . The cell forms two sporocysts, each sporocyst forming 

 two or four sporozoites. Genera: Cyclospora A. Schn. ('81), with two sporo- 

 zoites ; Isospora A. Schn. ('81), and Diplospora Labbd ('93), with four or more 

 sporozoites. 



Family 2. Tetrasporocystidae. Each organism forms four sporocysts, each of which 

 produces two sporozoites. Genera : Coccidium Leuckart ('79) (including Gous- 

 sia Labbe") ; Crystallospora Labbe" ('96). 



Family 3. Polysporocystidae. Each organism produces an indefinite number of 

 sporocysts, each of which produces one sporozoite, \_Barrouxia A. Schn. ('85),. 

 Diaspora L^ger ('99)], two sporozoites, [Adelea A. Schn. ('75), and some 

 species of Hyaloklossia Labbe" ('96)], three sporozoites, \_Benedenia A. Schn. 

 ('75), or four, Genus Klossia A. Schn. ('75)]. 



Order 3. H.3LMOSPORIDIIDA. Sporozoa of small size living in the blood-corpuscles 

 or plasm of vertebrates. The adult form is mobile, and in some cases is pro- 

 vided with myonemes. They reproduce by endogenous or asexual spore- 

 formation while in the host, and by exogenous spore-formation after conjugation. 

 Genera : Lankesterella Labbe" ('99) ; Caryolysus Labbe" ('94) ; Hcemogregarina 

 Danilewsky ('85); Caryophagus Steinhaus ('89); Halteridium Labbe* (""94); 

 Hamoproteus Kruse ('90); Plasmodiitm Marchiafava & Celli ('85); Laverania 

 Grassi & Feletti ('92) ; Cytamceba LabW ('94). 



Subclass II. NEOSPORIDIA. Sporozoa which form sporocysts throughout life; the 

 entire cell is not used in the formation of spores. 



