ACNIDOSPORIDIA, HAPLOSPORIDIA 

 a 



449 



Fig. 206. The development of I chthyosporidium, gigariteiim (Swarczew- 

 sky). a-e, schizogony; f-n, sporogonj^; o, stained spore, X about 1280. 



number, thus forming plasmodia. The plasmodia divide into 

 smaller bodies, while the nuclei continue to divide (b-e). Presently 

 the nuclei become paired (/, g) and the nuclear membranes dis- 

 appear (h). The Plasmodia now break up into numerous small 

 bodies, each of which contains one set of the paired nuclei (^, j). 

 This is the sporont (j) which develops into 2 spores by further 

 differentiation (k-o). 



Genus Haplosporidium Caullery et Mesnil. After growing into 

 a large form, plasmodium divides into uninucleate bodies, each of 

 which develops into a spore ; spore truncate wdth a lid at one end ; 

 envelope sometimes prolonged into processes; in aquatic annelids 

 and molluscs. 



H. chitonis (Lankester) (Fig. 207, a, h). In liver and connective 



