Phylum Fungilli [211 



gregata. Various other genera, Merocystis, Hyaloklossia, Myriospora, Caryotropha, 

 etc., attacking mussels, polychaet worms, and other marine invertebrates, are as- 

 signed to this family although their life cycles are not fully known. 



Family 4. Selenococcidiida [Selenococcidiidae] Poche in Arch. Prot. 30: 238 

 (1913) includes the single species Selenococcidium intermedium Leger and Dubosq 

 (1910) in the lobster. The vegetative cell is long and slender, and asexual reproduc- 

 tion is regularly by transverse division into eight. 



Order 2. Polysporea Lankester in Enc. Brit. ed. 9, 19: 855 (1885). 



Tribe Polysporea Biitschli in Bronn Kl. u. Ord. Thierreichs 1: 576 (1882). 



Suborder Haemosporidae Delage and Herouard Traite Zool. 1 : 284 ( 1896) . 



Order Haemosporidiida Labbe in Thierreich 5: 73 (1899). 



Order, suborder, or tribe Adeleidea Leger in Arch. Prot. 22: 81 (1911). 



Tribe Adeleoidae Poche in Arch. Prot. 30: 239 (1913). 



Order Adeleida with suborders Adeleina and Haemogregarinina Hall Proto- 

 zoology 296 (1953). 

 It is characteristic of this order that pairs of reproductive cells, essentially mero- 

 zoites, which are to become gametocytes, become attached to each other. The mac- 

 rogametocyte becomes converted into a single egg; the microgametocyte produces, 

 at least usually, four sperms. 



Family 1. Adeleida [Adeleidae] Mesnil in Bull. Inst. Pasteur 1: 480 (1903). 

 Chiefly in invertebrates, either in the gut epithelium or in the kidneys, testes, or other 

 organs. Zygote usually producing definite spores, these numerous (commonly twenty 

 or more), thin-walled, without definite dehiscence mechanism, with two or four 

 sporozoites. Adelea and Adelina chiefly in centipedes; Klossia and Orcheobius in 

 snails; Klossiella in the kidney of the mouse; Legerella in various arthropods, the zy- 

 gote not producing spores but numerous sporozoites. 



Family 2. Haemogregarinida [Haemogregarinidae] Liihe in Mense Handb. Tro- 

 penkrankheiten 3: 205 (1906). Heteroecious, with vegetative multiplication in the 

 tissues of a vertebrate host. The infection spreads to the erythrocytes of the host, and 

 blood-sucking invertebrates are infected by these. Sexual reproduction occurs in the 

 invertebrate host. Production of spores is suppressed; the zygote produces numerous 

 sporozoites. Haemogregarina Danilewski (1885; Drepanidium Lankester 1882, non 

 Ehrenberg 1861) in turtles, frogs, fishes, transmitted by leeches; Hepatozoon in ro- 

 dents, Karyolysus in lizards, transmitted by mites. 



Order 3. Gymnosporidiida Labbe in Thierreich 5: 77 (1899). 



Suborder Gymnosporidae Delage and Herouard Traite Zool. 1: 284 (1896). 

 Suborder Haemosporidia Doflein Protozoen 121 (1901). 

 Order Haemosporidia Calkins Biol. Prot. 441 (1926). 



Subclass Haemosporidia with orders Plasmodiida and Babesiida Hall Proto- 

 zoology 301, 302, 306 (1953). 

 In this order the vegetative cells occur in vertebrates and infect the erythrocytes. 

 Sexual reproduction, so far as it has been discovered, occurs in blood-sucking arthro- 

 pods. The gametocytes do not become associated in pairs; the male gametocytes pro- 

 duce numerous spirochaet-like sperms by a process of budding. In the zygote, the 

 nucleus undergoes a series of divisions, after which numerous naked uninucleate 

 sporozoites are budded off from the surface. There are no walled spores. 



