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) ; Anthorhynchus Labbe" ('99) ; Pileocephalus A. Schn. ('75) ; 

 AmflAoroides.La.bb6 ('99); Discorhynchus Labbe" ('99); Stictospora Le"ger 

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

 Le"ger ('92) ; Bothriopsis A. Schn. ('75) ; Coleorhynchus Labbe" ('99 ) ; Actitw- 

 cephalus 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 Le"ger ('92); Cometoides Labbe" ('99). 



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

 are crescent-shaped. Genera: Menospora Leger ('92); Hoplorhynchus Carus 



('63). 



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

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

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

 chus Stein ('48). 



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

 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 Labbe" C99) ; Pterospora Racovitza and Labbe" C96) ; 

 Cystobia Mingazzini ('91); Lithocystis Giard ('76); Ceratospora Leger ('92) ; 

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

 ('86). 



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. ( : 8i), with two sporo- 

 zoites ; hospora A. Schn. ('81), and Diplospora Labbe" ('93), with four or more 

 sporozoites. 



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

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

 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 Le"ger C99)], 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. KSMOSPORIDIIDA. 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: Lankestcrella Labbe" ('99) ; Caryolysus Labbe" C94) ; Hcemogregarina 

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

 Hcemoproteus Kruse ('90); Plasmodium Marchiafava & Celli ('85); Laverania 

 Grassi & Feletti ('92) ; Cytamceba Labbe" ('94). 



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

 entire cell is not used in the formation of spores. 



