6 



MYXOMYCETES. 



jEthalium, with columella?, branched out and 

 filled with air ..... 



21. Sporangium simple ..... 

 ^Ethalium ...... 



22. Sporangium provided with a columella 

 Sporangium without columella (Eclrinostcli- 



acece) ....... 



23. Columella reaching to one half, or almost 



to the top of the sporangium, giving origin 

 in numerous places to a net-like capilli- 

 tiuni (Stemonitacece) .... 

 Columella reaching to the top of the sporan- 

 gium, and here forming a discoid flatten- 

 ing, from which alone the capillitiuni takes 

 its origin (Enerihenemaced) . 



24. The last branches of the capillitiuni form on 



the surface a network parallel to the walls 

 of the sporangium .... 



Without such a surface network 



25. Columella below the apex loses itself in a 



capillitinm, forming on all sides a complete 

 interwoven network .... 



Columella reaching only to one half the 

 height of the sporangium ; capillitiuni 

 regularly forked (as in Tilmadoche\ or 

 forming an entangled net (as in Arcyrid) 



26. Fibres of the capillitiuni forked, but not 



combined into a network . . : 



Fibres of the capillitiuni only rarely forked, 

 some of the branches running out into free 



29. 



27. 



28. Columellae of the single sporangia grown 

 together in the sethalium into tree like 

 branches grown to the base of the ajtha- 

 liuni ....... 



Single columella? give rise to the system of 

 a regular capillitiuni joined into a network, 

 similar to Comatricha (Amaurochetacea) . 



From the single columella} the simple fibres of 

 the capillitiuni grow in a radial direction, 

 and combine with the similar fibres of 

 neighbouring sporangia at their common 

 point of union (Brefeldiacea) 



Net of capillitium consisting of stout fibres, 

 triangularly thickened at the knots . 



Fibres of capillitiuni at the outline of the 

 sporangium connected by means of large 

 empty bladders (or cells) 



30. 



31. 



Spumaria. 

 22 

 28 

 23 



27 



2-4 



26 



Stemonitis. 

 25 



Coma/ rich a. 



Lamproderma. 

 Enerthenema. 



Ecltinostelinm. 



29 

 30 



o 1 



ol 



Aiiuiuiochata. 



B re f eld la. 



