328 Marshall Ward. — On a lily-disease. 
bright spot, because the light meets with least obstruction 
or deflection at that part ; not only is the structure more 
translucent in that direction, but the neighbouring contents 
may even be acting, so to speak, as a lens. The glairy 
film surrounding the organ is deliquescent substance of the 
cell-wall, the organ being firmly attached by the conversion 
of part of its walls into a gum-like substance, and I shall 
shortly demonstrate that this must be due to the action 
of a ferment excreted by the tips of the hyphae when they 
come in contact with the glass. When contact is first made 
these hyphae are full of dense, bright protoplasm : in other 
words, the strong hyphae are very active. As the walls 
thicken and stick to the glass, and darken in hue, the 
protoplasm becomes more and more vacuolated, and may 
finally be nearly all used up, the changes being very much as 
in the case of the branches in Fig. 45. Before this, however, 
the attached organ may branch, at or near the extreme tip 
(Fig. 24), or further behind ; such branching often occurs 
before attachment, as shown in Figs. 21-25* 
It remains to be said that these organs of attachment are 
not necessarily confined to the vertical branches ; for on older 
cultures, where the air in the damp chamber is kept sufficiently 
moist, branches growing off from the surface of the hanging 
drop come in contact with the sides and bottom of the 
chamber and form just such organs, sometimes in enormous 
quantities. 
These organs may also be much more complex than any 
figured in the plates, branching repeatedly just below the 
apices, until, occasionally, a tassel-like tuft of close, short 
hyphae is formed (Fig. 26), all the tips of the short branches 
flattening themselves vertically on to the glass. Everything, 
in fact, points to these organs being of the same morpho- 
logical nature as those figured by Brefeld in Peziza sclero- 
tiorum 1 , and explained by De Bary subsequently as organs of 
attachment. 
Schimmelpilze, Hft. IV. Taf. ix. Figs. 11 and 15. 
