MYXOMYOETEB. 



32, 



33. 



34. 



35. 



36. 



37. 



38. 



39. 



Without capillitium (Atrichce) 

 With capillitium (Tricjiophorai) . 



Side walls of the sporangium not present or 

 uniform (Anemete) ..... 



Wall of sporangium possessing on the inner 

 side a secondary system of variahle net- 

 like thickenings [II eterodennece} 



Sporangium stipitate (Dictyosteliacece) 



Sporangium or ^Ethaliuni with entire side 

 walls (Liceacece) ..... 



yEthaliuni with regularly perforated walls 

 (Clathroptychiacece) .... 



Sporangium naked, stem consisting of many 



1 * ' i I ^ * 



Plasmodiocarpia ..... 



Sporangia cylindrical, heaped together, stand- 

 ing on the strongly developed, sometimes 

 stipitate looking hypothallus . 



^Ethalium naked ..... 



./Ethalium formed of one layer of single 

 sporangia, the single sporangia being so 

 constructed that from the upper bell- shaped 

 part six three-cornered fibres run towards 

 the base ...... 



JEthalium formed of many layers of spor- 

 angia, their outermost walls grown to- 

 gether into a smooth, single, paper-like 

 bark, the inner ones connected with each 

 other in six places, having at the contact 

 of any two of them large openings ; the 

 remainder of the walls form a three- 

 winged skeleton of the all-sided network . 



System of secondary permanent thickenings 

 netlike, of thin fibres, usually expanded 

 at the knots ...... 



System of permanent thickenings netlike, 

 formed of parallel wide ribs combined by 

 very thin transverse fibrils 



System of permanent thickenings netlike in 

 the lower part of the sporangia, as in 

 Dictydivm ; in the upper part constructed, 

 as in Cribraria ..... 



^Ethalram simple, the sporangia having 

 columellse (Reticularice) .... 



Sporangia or sethaliuni without columellse 



33 

 39 



34 



38 

 35 



36 

 37 



Dictyostelium. 

 Licea. 



Tubulina. 

 Lindbladia. 



Clathroptyclimm. 



40. Columella of sporangia developed into tree- 

 like branchings, crown to the bottom of 



O " _; 



the ^Ethaliuni (JReticulariacece) 



Enteridium. 



Cribraria. 



Dictyrfhim. 



Hetei odictyon. 

 40 

 42 



41 



