302 PROTOZOOLOGY 



Genus Lycogala Adan.son (Fig. 137, (j) 



Capillitium a system of uniform threads. .Sublegion 2 Caloneminea 



Capillitium Threads with spiral or annular thickenings 



Family 1 Trichiidae 



Genus Trichia Haller (Fig. 137, h-j) 



Capillitium abundant, consisting of free elasters with spiral 

 thickenings. 



Capillitium combined into an elastic network with thickenings in 



forms of cogs, half-rings, spines, or warts 



Family 2 Arcyriidae 



Genus Arcyria Wiggers (Fig. 137, k, I) 



Sporangia stalked; sporangium-wall evanescent above, persist- 

 ent and membranous in the lower third. 



Capillitium abundant; sporangia normally sessile 



Family 3 Margaritidae 



Genus Margarita Lister 

 Capillitium profuse, long, coiled hair-Hke. 



Spores develop on the surface of sporophores . . Tribe 2 Exosporeae 



Spores white; borne singly on filiform stalk 



Family Ceratiomyxidae 



Genus Ceratiomyxa Schroter (Fig. 137 m, n) 



Suborder 2 Sorophora Lister 



Pseudoplasmodium incomplete; myxamoeba of limax-form 



Family 1 Guttuliniidae 



Pseudoplasmodium complete; myxamoeba with short pointed 



pseudopodia Family 2 Dictyosteliidae 



The Proteomyxa and the Mycetozoa as outlined above, are not 

 distinctly defined groups. Li reality, there are a number of 

 forms which stand on the border line between them. 



Phytomyxinae Schroter 



These organisms which possess a large multinucleate amoeboid 

 body, are parasitic in various plants and also in a few animals. 

 They do not form any sporangium and their methods of spore- 

 formation are simple. 



Genus Plasmodiophora Woronin. Parasitic in the root of the 



