ACNIDOSPORIDIA, SARCOSPORIDIA 



511 



become paired (J, g) and the nuclear membranes disappear ih). The 

 Plasmodia now break up into numerous small bodies, each of which 

 contains one set of the paired nuclei (i, j). This is the sporont ij) 

 which develops into 2 spores by further differentiation {k-o). 



Genus Haplosporidium Caullery and Mesnil. After growing into 

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



Fig. 241. The development of IchthT/osporidium giganteum (Swarczewsky). 

 a-e, schizogony; f-n, sporogony; o, stained spore, X about 1280. 



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

 envelope sometimes prolonged into processes; in aquatic annelids 

 and molluscs. 



H. chitonis (Lankester) (Fig. 242, a, b). In liver and connective 

 tissue of Craspidochilus cinereus; spores oval, 10/* by 6m; envelope 

 with 2 prolonged projections. 



H. limnodrili Granata (Fig. 242, c). In gut epithelium of Lim- 

 nodrilus udekemianus; spores 10-12^ by 8-10/x. 



