286 Sporozoa 



Family 9. Monoductidae. The epimerite is usually a small knob, with 

 or without prongs. Early syzygy is unknown. A single sporoduct is char- 

 acteristic of Monoductus but not of other genera. The spores usually 

 emerge in chains. 



The following genera are included: Colepismatophila Adams and Travis (Fig. 6. 9, 

 E, F), Lepismatophila Adams and Travis, Monoductus Ray and Chakravarty (111; Fig. 

 6. 9, C, D), and Sphaerocystis Leger. 





Fig. 6. 10. Porosporidae (after Halt): A. Gymnospore of Nematopsis 

 legeri, section, x3105. B. Later development of gymnospore (Porospora 

 gigantea) in molluscan tissue, x3240. C. Sporozoites of N. legeri in phagocyte, 

 molluscan gill, x2835. D. "Cyst" with spores, A', legeri, xl425. E. Sporozoite 

 (A^. legeri) escaping from spore in gut of crab; from living, xl425. F, G. 

 Young and older trophozoites (P. gigantea) attached to intestinal epithelium 

 in crustacean host; xl500. H. Young cephalin of N. legeri attached to epi- 

 thelium of crustacean intestine; xl425. 



Family 10. Porosporidae. The epimerite is a simple disc or rudimentary. 

 Syzygy is often early and may be multiple, but a typical gametocyst is not 

 produced. Instead, gymnospores (blastula-like clusters of "merozoites"), 

 derived from individually encysted gregarines (42), leave the gut of the 



