BUTLEU AND tikm 203 



Fig. -J. Ripe sclerotiiiiu in longitudinal section, showing the irregular loculi, immersed 

 in a pseudo-parenchymatous stroma. The cavities were filled with spores, 

 which are not shown. 

 ,, o. Another ripe sclerotium in transverse section. At the base, this sclerotium 

 showed only two large loculi. Xear the apex there were seven cavities, 

 arranged roughly in a ring and mostly opening by a common mouth. 



Plate IV. 



i'ig. J. Transverse section of part of the pith of a caue, infected by IL ndersoaina 

 Saccltari. The hyphaj grow from the intercellular spaces into the cell 

 cavities. Intermediate and fine hypha* are present, but not the very 

 thick kind. X I'JO. 



„ '2. Very thick bypha from the surface growth obtained on incubating an in- 

 oculated cane. Branches of intermediate diameter are numerous. These 

 in turn will give ofi' very fine threads. Septation has not yet occurred. 

 X :J50. 



,. ;). Mycelium from a culture, showing fine and intermediate hyphiv and chlamy- 

 dospores. The fine branches are irregularly swollen, and at a, two have 

 anastomosed by a side branch, f.ater stage of growth than Fig. 2. 

 X 350. 



,, 4. Chlamydospores separated from the mycelium and germinating. X ."tOO. 



„ .">. Formation of chlamydospores. <i. early stage, intercalar : b ditto, terminal : 

 c a chain separating from the mycelium (one is germinating), d old 

 chlamydospores from a chain, that on the right has lost part of its 

 exospore. X 350. 



,, t). Part of the wall of a pycnidium, showing the abrupt transition from the 

 sclerotial cell layers to the basidial layer. 

 Basidia with filamentous spores (scolecospores). X C25. 

 Basidia with the broad type of spore (pycnospore). X G25. 

 Simple types of basidium, the 3 on the left with hyaline scolecospores of a 

 broader type than usual, that uu the right with a young pycnospore. 

 X [\2'o. 



Plate \'. 

 Fig. 1. Pycnospores of llendersoinna Sacclicni. X 520. 



,. -. Scolecospores of ditto. Some stromata contain only the narrow type, 



uniform in diameter shown at a a, others the more irregular forms, 



X 520. 

 .. •"). Intermediate type of spore between the pycnospore and scolecospore types, 



X520. 

 ., 4. Germination of the pycnospores. early stages (21 hours afler sowing). 



X 520. 

 ., 5 Ditto, later stages (-!:« hours after sowing). X 520. 



., 4 . 



.. 11. 



