Dr. Holló Ferenc szerk.: Parasitologia Hungarica 3. (Budapest, 1970)

zoites pierce between the epithelium passing downward to the lamina propria, until finally they are phagocytized by the macrophages. G-ametogony follows upon schizogony, but they may run synchronically for a while. This accounts for the circumstance that the birds excrete oocysts for several days (patent period) after gametogony, too, though an intercurrent infection could be excluded. During gametogony, the telomerozoites may differentiate either into a single female individual (macrogamete

) or into several motile flagellated males (microgametes

). Microgamete development of several eimerian species (microgametogony) was studied also electronmicroscopically

. In the young microgame

tocyte

,the nucleus divides several times in succession and the new nuclei thus formed arrange peripherally. The chromatin-rich nuclei elongate, assume a parallel order along the periphery and with a little cytoplasm added, they develop to microgametes. The greater part of the microgamete

'

s body consists of the nucleus. The perforatory, which plays a role in fertilization is localized anteriorly to the nucleus. The perforatory of E. tenell

a microgametes consists of 3 kinetosomes from which arise 3 posteriorly extending flagella

.According to JURAJDOVA (1969), also the E.acervulin

a microgametes are triflagellar and there is reason to suppose that this applies also to other Eimeriae

. The microgametes insert the appropriate end of the perforatory into macrogametes very likely prior to the development of the wall

. The development of the female stages (macrogametogony

) has been disclosed by light- and electronmicroscopic studies (MclAREN, 1969; SCH01TYSECK, 1962; SCH01TYSECK and WEISENEELD, 1956,