ACNIDOSPORIDIA 



329 



into numerous small bodies, each of which contains one set of 

 the paired nuclei {i, j). This is the sporont (j) which develops 

 into two spores by further differentiation {k-o). 



Several genera have been recorded. A few genera will be 

 briefly mentioned here. 



Fig. 142 The development of Icthyosporidiuni giganteum. Variously magni- 

 fied. (After Swarczewsky). 

 a-e, schizogony; f-n, sporogony; o, a stained spore (X about 1275). 



Genus Haplosporidium Caullery and Mesnil. After develop- 

 ing into a large form, the Plasmodium divides into uninucleate 

 bodies, each of which develops into a spore. The spore is trun- 

 cate at one end where a lid occurs. The envelope is sometimes 

 prolonged into processes. In salt and fresh water annelids and 

 molluscs. 



