278 Sporozoa 



found in the sperm ducts and in cocoons (9). Therefore, transfer of the 

 spores along with spermatozoa represents one method of dispersal. Death 

 of the host would also liberate spores in the soil, and the ingestion of 

 infected forms by birds and the elimination of spores in droppings has 

 been suggested as a mechanism for wider dispersal. 



The life-cycles of the Porosporidae (42) are interesting exceptions to 

 the usual pattern in that both a crustacean and a molluscan host are 



Fig. 6. 5. Schizogregarinida. A-E. Ophryocystis mesnili: syzygy (A); 

 gametocyles in gametocyst (B); one gamete formed from each gametocyte 

 (C); zygote after secreting oocyst membrane (D); sporozoites in oocyst (E); 

 xl600 (after Leger). F. Ophryocystis schneideri attached to epithelium; 

 xl600 (after Leger). G. Merogregarina amaroucii, anterior half of attached 

 sporont; xl600 (after Porter). H-N. Madiadoella triatomae: trophozoite (H); 

 schizont, four nuclei (I); merogony (J); merozoite (K); syzygy (L); gametes 

 formed within gametocyst (M); oocysts within gametocyst (N); L, xl012; 

 other figures, xl995 (after Reichenow). 



