MORPHOLOGY AND TAXONOMY OF THE SARCODINA 405 



Family 2. Orcadellidae MacBr. em. 



A single genus Genus Orcadella 



Family 3. Liceidae MacBr. 



A single genus Genus Licea 



Family 4. Tubiferidae MacBr. em. 



1. Sporangia stipitate; clustered Genus Alwisia 



Sporangia in linear series 2 



2. Spores olivaceous < lenus Lindbladia 



Spores umber Genus Tubifera 



Family 5. Reticulariidae MacBr. em. 



1. Spores brownish or umber 2 



Spores yellowish Genus Dictydiaethalium 



2. Sporangia bounded by broad perforated 



plates Genus Enteridium 



Sporangia wholly indeterminate. . . .Genus Reticularia 

 Legion 4. Lycogalales MacBr. 



One genus only Genus Lycogala 



Legion 5. Trichiales MacBr. 



1. Capillitium a distinct net; no spiral bands 



Family 1. Ahcyriidae 

 Capillitium threads fixed or free; no net. . . 2 



2. Capillitium threads free; with spiral bands 



Family 2. Trichiidae 

 Capillitium threads attached 3 



3. Threads attached at both ends 4 



Threads attached at one end if at all 



Family 3. Perichaenidae 



4. Threads plain or slightly roughened 



Family 4. Dianemidae 

 Threads definitely sculptured. . .Family 5. Prototrichiidae 

 Family 1. Arcyriidae MacBr. em. 



1 . Capillitium elastic 2 



Capillitium non-elastic Genus Lachnobolus 



2. Capillitium attached at base; no hamate 



brandies Genus Arcyria 



Capillitium centrally attached, with ham- 

 ate branches Genus Heterotrichia 



Family 2. Trichiidae MacBr. em. 



1. Capillitium threads long, centrally at- 



tached 2 



Capillitium threads short, free, sometimes 

 branched 3 



2. Sculpture spiral Genus Hemitrichia 



Sculpture reticulate Genus Calonema 



3. Threads, elaters, marked by spiral' bands 



Genus Trichia 

 Threads with irregular sculpture or none 



Genus Oligonema 



Family 3. Perichaenidae MacBr. em. 



Sporangia more or less grouped; dehiscence 



irregular Genus Ophiotheca 



Sporangia grouped; polygonal; dehiscence by 



lid Genus Perichaena 



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