74 



MYXOMYCETES. 



I. Tubes of the capillitium cylindrical. 

 Thickenings 'strongly band-like, des- 

 cribing a spiral or diffuse twist, 

 with the rest of the tube covered 

 with very small spines. 

 ! Tubes of equal thickness throughout 



its entire length. 



! ! Tubes in the upper part of the 

 capillitium broader than in the 

 lower. . . . . 



ft Thickenings strongly spiny, not 

 numerous, mixed together with- 

 out order in a diagonal band. . 

 ff f Thickenings exclusively spiny. 



lickenings spiny, but with the 

 spines united amongst them- 

 selves, forming a thin, irregular 

 network on the surface of the 

 tubes. ..... 



Tubes of capillitium triangular, 



with the angles rounded. 

 Thickenings on one side band- 

 like, on the two others irre- 

 gularly reticulated. 



INCARNATA. 



affinis. 



NUTANS. 



<EI stedtii. 



II. 



dictyonema. 



FEKRUGINEA. 



Genus 33. 



LACHNOBOLUS. Fries. 



Sporangia stipitate, or sub-stipitate, splitting irregularly ; net of 

 the capillitium with numerous arms grown uniformly to the whole 

 surface of the wall of the sporangium. Rtfki. Mon., 281. 



90. Lachnobolus congesta. B. Sf Br. 



Sporangia sessile, crowded together in orbicular masses, shining, 

 yellowish umber; capillitium of branched threads of the same 

 colour as the spores, warted ; spores globose, 'OOTd-'Ol mm., 

 yellowish umber. Ann. Nat. Hist., No. 1604, t. 9, fig. 2. 



On dry wood. 



Genus 39. 



R. 



Simple sporangium provided with a wall the single membrane 

 of which is covered in numerous places with irregularly mixed 

 coloured cells ; capillitium of tubes combined into a net, grown 

 uniformly to the entire inner surface of the wall. Rt/ki. J\fon., 284. 



Genus 40 , 



LYCOGALA. Mich. 



More or less rounded, variously coloured sethalia, joined together 

 intricately into an obtuse vein-like, nuked plasmodiocarp ; outer 



