432 PROTOZOOLOGY 



Genus Cribraria Persoon (Fig. 181, c) 



Sporangia stalked; wall thickened and forms a delicate persistent 

 network expanded at the nodes. 



Sporangia solitary; stalked Family 6 Liceidae 



Genus Orcadella Wingate (Fig. 181, d) 

 Sporangia stalked, furnished with a lid of thinner substance. 



Sporangium-wall membranous without granular deposits 



Family 7 Tubulinidae 



Genus Tubulina Persoon (Fig. 181, e) 



Sporangia without tubular extensions. 



Many sporangia more or less closely fused to form large bodies 



(aethalia); sporangium-wall incomplete and perforated 



Family 8 Reticulariidae 



Genus Reticularia Bulliard (Fig. 181,/) 



Walls of convoluted sporangia incomplete, forming tubes and folds 

 with numerous anastomosing threads. 



Sporangia forming aethalium Family 9 Lycogalidae 



Genus Lycogala Micheli (Fig. 181, g) 



Oapillitium a system of uniform threads 



Capillitium threads with spiral or annular thickenings 



Family 10 Trichiidae 



Genus Trichia Haller (Fig. 181, 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 11 Arcyriidae 



Genus Arcyria Wiggers (Fig. 181, A;, I) 



Sporangia stalked; sporangium-wall evanescent above, persistent 

 and membranous in the lower third. 



Capillitium abundant; sporangia normally sessile 



Family 12 Margaritidae 



Genus Margarita Lister 



Capillitium profuse, long, coiled hair-like. 



Spores develop on the surface of sporophores 



Spores white; borne singly on filiform stalk 



Family 13 Ceratiomyxidae 



