60 GENERAL ORGANIZATION OF THE PROTOZOA 



Family 4. Didymophyidoe, Leger. The sporonts always associated in pairs, the 

 protomerite of the satellite disappearing, thus giving the appearance of an 

 organism with three chambers and two nuclei. 



Genus 28. Didyrnophijes, Stein, 1S4S. The epimerite has the form of a spike. 

 Cysts open by simple rupture liberating the oval spores. Four species. 



Family 5. DactylophoridoE, Leger. The epimerite is asymmetrical and irregular, 

 with digitiform processes. Sporocysts open by simple rupture or by the 

 swelling of a residual mass of plasm termed a " pseudocyst." 



Genus 29. Rhopalonia, Leger, 1S93. The epimerite is irregular and asymmet- 

 rical, bearing finger-formed prolongations. The trophozoite is solitary and 

 with traces only of a protomerite. One species, R. geophili, Leger, from gut 

 of geophilus sp. 



Genus 30. Echinomera, Labbe, 1899. The trophozoite massive and oval in 

 outline; epimerite persistent and spiked, the point bearing small transitory 

 digitiform processes. Cysts open by simple rupture. One species, E. hispida, 

 A. Schn., from gut of Lithobius forficatus. 



Genus 3L Trichorhynchus, A. Schn., 1882. Protomerite truncated with an 

 elongated and conical top. Cysts with oblong, wart-like protuberances. 

 Cysts open by the swelling of laterally placed pseudocysts. Spores not in 

 strings. One species, T. pulcher, A. Schn., from the gut of Scutigera. 



Genus 32. Pterocejjhaliis A . Schn., 1887. Protomerite extends beyond the deuto- 

 merite on the two sides and is divided into two lobes by a constriction; the 

 two lobes are provided with sharp papillae, and are united on one side and 

 so ciu'ved as to form a coiled horn. The spores are oval and associated 

 oblicjuely in strings. One species, P. nobilis, A. Schn., from gut of Scolo- 

 pendra. 



Genus 33. Dactylophorus, Balb., 1889. The protomerite is dilated excentrically 

 and bears epimerite with digitiform processes. Sporonts are solitary and 

 elongated; cysts spherical ami spores cylindrical; cysts open by swelling of 

 lateral pseudocyst. One species, D. robustus, Leger, from the gut of Cryp- 

 tops hortensis. 



Family 6. Actinoccphalida, Leger. Sporonts always solitary with simple, sym- 

 metrical, or irregular appendages. Cysts open by simple rupture. Spores 

 biconical, cylindrical, or navicular. Parasitic usually in the gut of carnivorous 

 arthropods. 



Group A. SciadiophoriiKF, Labbe, 1899. Protomerite umbrella-shaped, and with 

 radiating ridges. Spores biconical and with central swellings, the opening 

 at the equator by simple dehiscence, while the endospore opens terminally. 



Genus 34. Sciadiophora, Labbe, 1899. The epimerite is large and flattened and 

 with the characteristics of the group. Three species from digestive tracts 

 of phalangidfe. 



Group B. Anthorliynrhinw, Labbe, 1899. Spores ovoid with pointed ends; 

 joined in strings; equatorial opening. 



Genus 35. AnthorhyncJms, Labbe, 1899. Epimerite in form of a large grooved 

 knob or button. One species from gut of Phalangium opilio. 



Group C. Pileocephalincc, Labbe, 1899. Epimerite simple and regular; cysts 

 open by simple rupture ; spores usually biconical. 



Genus 36. Pileoccphalus, A. Schn., 1875. Epimerite simple and regular and 

 somewhat lance-like. Cysts open by simple rupture, spores biconical. 



Genus 37. Amphoroides, Labbe, 1899. Epimerite spiked or rounded; proto- 

 merite very short and cup-like. Spores biconical. One species, A. polydesmi, 

 Leger, from the gut of Polydesmus. 



Genus 38. Discorkynchus, Labbe, 1899. Epimerite large and discoid, with a 

 distinct rim; protomerite larger than the deutomerite, which is regularly 

 cylindrical and truncated posteriorly. Cysts spherical, spores biconical and 

 slightly bent. One species, D. truncatus, Leger, from gut of Sericostoma sp. 



