14 
FETCH : 
lameUa, elsewhere with walls 4 pi- or more thick. The greatest 
reduction of the fibres occurs in the ‘‘ spring wood ” ; in the 
autumn wood they often appear quite sound. Where con- 
siderable reduction has occurred, the walls of the fibres are 
perforated with large irregular openings. 
Chlor-zinc -iodine stains all the remains of the wood brown 
to yellow-brown ; no blue was observed. With phloroglucin 
and hydrochloric acid the fibres and vessels stain, but the 
medullary rays do not ; the contrast in the stained cross section 
is most striking. Occasionally, where a rather thick wall of 
a cell in a medullary ray has been left, this stains with 
phloroglucin. In the autumn wood the walls of the fibres 
stain uniformly with phloroglucin, but in the spring wood 
they exhibit differential staining, the colour becoming more 
intense towards the middle lamella. 
The action of the fungus on the wood thus agrees with that 
found in the previous case ; the medullary rays are attacked, 
or at least destroyed, first, and then the vessels and fibres. 
But the destruction of the wood has not proceeded so far 
as in the case of the pseudo -sclerotium of this species first 
described. 
With regard to the amount of the fungus tissue present, 
however, this example differs widely from the former. The 
vessels and the medullary rays (or the sites of the latter) 
contain numerous interlacing hyphæ, but there are com- 
paratively few in the fibres. In no case do the hyphæ 
completely fill the lumina of the cells. The first sclerotium 
was a solid mass of mycelium in which the remains of the 
wood were embedded ; the second, in the condition as gathered, 
is a piece of decayed wood containing comparatively little 
mycelium. 
The mycelium consists of two elements only. One of these 
consists of the thin-walled hyphæ previously noted, the other 
of the rigid thick-walled, regular hyphæ, about 2 pt, diameter, 
bearing the globose conidia-like bodies described above. No 
coralloid hyphæ have been found, but the cells contain 
amorphous masses, in comparatively small quantity, which, 
like the globose conidia-like bodies, stain yellow-brown with 
iodine in potassium iodide. The reactions of the two 
