206 The Philippine Journal of Science i9i8 



Subphylum SPOROZOA — Continued. 

 Class Telosporidia — Continued. 

 Order Coccidiida — Continued. 



zoites. In general, the life histories correspond to the life cycle 

 for Coccidium, schubergi as given by Schaudinn in his classical 

 paper." A group of rare interest. 

 Suborder Asporocystinea. — The sporoblasts form no sporocysts, the 

 sporozoites forming directly from the oosphere." 

 Family Eimeridae (Asporocystidas Leger). — Sporocysts are absent, 

 the sporozoites lying unprotected in the parent cell. Typical 

 species, Eimeria nova, parasitic in Glomeris. 

 Suborder Sporocystinea. — The sporoblasts are covered by a sporocyst 

 membrane within which the sporozoites are produced. 

 Family Isosporidae (Disporocystid^ Leger). — The oosphere gives 

 rise to two sporoblasts with sporocyst coverings. Typical 

 genus, Isospora A. Schneider, 1881. 

 Family Coccidiidae (Tetrasporocystidae Leger). — The oosphere gives 

 rise to four sporoblasts with sporocysts. These are the true 

 "Coccidia." Typical genus, Coccidium Leuckart, 1879. 

 Family Coccidiidae (Tetrasporocystidae Leger). — The oosphere gives 

 rise to many sporoblasts with sporocysts. Typical genus, 

 Klossia A. Schneider, 1875. 

 Order Haemosporidia (Danilewsky). — An unsettled order including many 

 members whose life histories are imperfectly known. It includes 

 haematozoic parasites, cytozoic or coelozoic in the blood stream of 

 the vertebrate hosts. The affinities of some point to the Masti- 

 gophora and of others to the Coccidiida. 

 Suborder Acytosporea (Minchin). — Blood parasites of vertebrates in 

 which the principal stages of the asexual cycle including schi- 

 zogony are carried out in the host cell or corpuscle. Sporogony 

 is completed in the alimentary tract or body cavity of some 

 blood-sucking arthropod — an insect or arachnid, in the known 

 cases. The parasite of malaria is at present included in this 

 suborder. Typical genera: Plasmodium Marchiafava and Celli, 

 1885; Babesia Starcovici, 1893. 

 Suborder Haemosporea (Minchin). — The Haemogregarines. They are 

 found parasitic mainly in cold-blooded animals. They are in- 

 tracellular parasites in the blood, becoming free in the blood 

 stream. There may or may not be an alternation of hosts. 

 Typical genus, Haemogregarina Danilewsky, 1885. 



'' Schaudinn, Fritz, Der Generationswechsel bei Coccidien, Zool. Jahr- 

 biicher (Abth. f. Anat.) (1900), 13, 197. Fritz Schaudinn's Arbeiten. 

 Leopold Voss, Hamburg und Leipzig (1911), 208. 



" It is probably only a matter of a short time before the genus Plasmo- 

 dium will be removed from the order Haemosporidia and placed in this 

 group, where it obviously seems to belong. Franca [Journ. de Sciences 

 Matematicas, Fisicas e Naturals, Ser. 3, No. 1 (1917), Lisbon: Imprensa 

 Nacional; cited in Trop. Vet. Bull. (1917), 5, 231] has recently taken a 

 definite step in this direction. He makes the Coccidia and Haemosporidia 

 suborders of the order Coccidiomorpha (Coccidiida) and breaks the Hae- 

 mosporidia up into four families: the Haemogregarinidae, the Plasmodidae, 

 the Piroplasmidffi, and the Toxoplasmidae. 



