208] 



The Classification of Lower Organisms 



Sporozoite, the original infective cell. 



Trophozoite, the vegetative individual. 



Nucleogony, the multiplication of nuclei. 



Plasmotomy, multiplication of cells. 



Meront or schizont, the individual in process of dividing to produce further infec- 

 tive cells. 



Schizogony or agamogony, the process of dividing to produce infective cells. 



Merozoite or agamete, the infective cell produced from a trophozoite. 



Gamogony, the production of gametes. 



Macrogamete and microgamete mean, of course, egg and sperm; macrogametocyte 

 and microgametocyte mean the cells which produce them. 



Sporoblast or sporont, the zygote or other cell inside of which walled cysts are 

 produced. 



Sporogony, the sexual cycle which produces walled cysts. 



Sporulation, the production of walled cysts by asexual processes. 



Spore, the walled cyst. 



Trophozoite (or schizont) and sporont are regarded as the alternating main stages 

 in the life cycle of Sporozoa. The point at which meiosis occurs is uncertain. In the 



Fig. 41. — Life cycle of Goussia Schubergi after Schaudinn (1900) : a, sporozoites; 

 b-d, developing trophozoites; e, schizogony; f, merozoites; g, young gamctocytes; 

 h. i, development of egg; j-m, development of sperms; n, fertilization; o, zygote 

 (sporoblast); p-t, development of spores; u, germination of spores. 



