198 THE MYXOMYCETES OF PICTOU COUNTY. MOORE. 



Capillitium a loose net of pink or rose-colored threads, 3 3.5 AI 

 wide, attached by a few strands which run to the centre of the 

 stipe. The strands or tubules are marked with rather distant 

 cogs and half rings arranged in an open spiral. Perforated 

 plate-like expansions are found here and there at the nodes, 

 more particularly in the lower portion of the net. Free ends 

 are occasionally found but are rare. Spores colorless by trans- 

 mitted light, almost smooth or slightly roughened and with a 

 few scattered warts, 7 8 /A in diameter. 



A common species found on decaying Populus tremuloides, 

 Fagus ferruginea and Abies balsamea. 



30. Arcyria denudata (Linn.) Sheldon. Sporangia gre- 

 garious, cylindrical stipitate; total height with expanded 

 capillitium 3 4 mm . Stipe about l mm , filled with spore-like 

 cells 12 14 /A in diameter. Calyculus plicate, smooth; capilli- 

 tium, a net of rosy threads fading to dusky yellow, 3 4/A wide 

 'and adorned with distant cogs and half rings arranged in the 

 form of .an open spiral. Near the calyculus the threads are 

 almost smooth. The capillitium is attached to the calyculus at 

 many points and hence is not deciduous. Spores colorless by 

 transmitted light, smooth, about 7 /A in diameter. 



Found on decaying conifers ; not rare. 



31. Arcyria cinerea (Bull.) Pers. Sporangia gregarious, 

 cylindrical or somewhat broader at the base, stipitate, ash 

 colored. Stipe variable in length, in some gatherings .T5 mm 

 long, in others, the sporangia are almost sessile. Total height 

 of sporangia with expanded capillitium, 2 2.5 mm . Stipe dark, 

 of almost uniform thickness, hollow, filled with spore-like cells. 

 Calyculus plicate at the base. Capillitium a close net attached 

 at many points to the calyculus. The peripheral portions of the 

 net consist of threads or tubules 3 3. 5 /A wide adorned with 

 close-sot spines and presenting many plate-like expansions at the 

 nodes and elsewhere. The interior portions of the net and also 

 the part near the calyculus consist of tubules somewhat wider 



