a(32 



Fig. 240. a-e, Ophryocystis mesnili (a, trophozoite attached to Mal- 

 pighian tubule; b-e, sporogony), X1330 (Leger); f, g, Merogregarina 

 amaroucii, X1000 (Porter); h, i, Spirocystis nidula (h, X770; i, X500) 

 (L6ger and Duboscq); j, k, Caulleryella pipientis (j, gut of Culex pipiens 

 with trophozoites, X200; k, a spore, X1200) (Buschkiel). 



Genus Spirocystis Leger and Duboscq. Schizogony intracellular; 

 schizonts curved, one end highly narrowed; mature schizonts 

 snail-like, with numerous nuclei; repeated schizogony (?); gametes 

 in chloragogen cells, somatic and visceral peritonium; association 

 of 2 gametes produces a spore. One species. 



S. nidula L. and D. (Fig. 240, h, i). In coelom and gut epithelium 

 of Lumbricus variegatus; multinucleate schizont about 35/z long; 

 microgametes fusiform or ovoid, 7/x by 3/x| macrogametes ovoid 

 or spherical, 11/x in diameter; fusion of 2 gametes produces one 

 spore which is thick-walled, 35/x long and contains one sporozoite, 

 up to 40^ long. 



Family 2 Schizocystidae Leger and Duboscq 



Two or more spores are produced in a pair of gametocytes. 



Genus Schizocystis Leger. Mature trophozoite multinucleate; 

 ovoid or cylindrical with differentiated anterior end; schizogony 

 by multiple division; trophozoites become associated, encyst, and 

 produce numerous (up to 30) spores, each with 8 sporozoites; in 

 Diptera, Annelida, and Sipunculoida (Leger, 1909). 



S. gregarinoides L. (Fig. 239). In gut of larvae of Ceratopogon 



