MYXOMYCETES. 



9 



2. Single sporangia of aethaliuni without capil- 



litium ....... 



Single sporangia of sethalium with capilli- 

 tiuin ....... 



3. Walls of sporangia grown together entirely 

 With the evanescent walls reduced to six 



triangular threads ..... 



4. Sporangia, without columella 



Sporangia, with columella .... 



5. Sporangia combined into a close plait, de- 



prived of walls, except on the outside, 

 covered with a cortex, formed of two 

 layers of coloured vesicles ; capillitium 

 without lime, or outer thickenings ; spores 

 not violet ...... 



Sporangia combined into a close plait; walls 

 containing lime, now and then the outer- 

 most formed into a cortex ; capillitium 

 with granules of lime, deprived of all 

 external thickenings ; spores violet 



6. Columella grown together, with tree-like 



branches, grown to the bottom ofthea^tha- 

 lium ....... 



7. Spores violet ....... 



Spores brown ; capillitium of thin-sided 



tubes, without thickenings, filled with air 



8. ^Ethaliuni of a tree -like form, wholly covered 



with vesicles filled with lime. 

 Walls of sporangia grown together, covered 



with crystals of lime . 

 JEthalium of irregular form, without lime . 



9. Covered with a thick cortex, capillitium in 



the form of an all-sided net of stout 

 fibres ....... 



Naked, with the surface warted; capillitium 

 of thin threads, at the boundary of the 

 single sporangia joined to large octo- 

 cellular vesicles filled with air 



Lindbladia. 



Clathroptychiuni. 

 5 

 6 



Lycogala. 



Fuligo. 



7 

 8 



Reticularia. 



Spumaria. 

 9 



Amaurochcete . 



Brefddia. 



