12 
FETCH : 
skeleton, however, consists of the remains of the fibres ; these 
occur in extensive patches, on the whole fairly continuous, 
but often broken up and forming zigzag lines, composed of 
single walls of adjacent fibres. In some places all the fibres 
have been consumed and the cavity is filled with mycelium ; 
in others the thickened angles of the fibres remain isolated 
and embedded in the mass of mycelium. Where the fibres 
form a continuous network, their walls are much reduced, 
sometimes to the middle lamella, but in general the remains 
of the walls are about 4 pi, thick. 
With chlor-zinc -iodine the remains of the vessels and 
fibres stain yellow-brown ; no trace of blue was observed. 
With phloroglucin and hydrochloric acid all the remains of 
the wood stain rose-pink, even in the places where only the 
corners of the fibres persist, and there is no evident increase 
in intensity of colouration from the exterior to the middle 
lamella. Thus, the remains of the fibres are not delignified. 
The action of Lentinus infiindihidiformis on the wood 
thus agrees with that of L. similis, in that the wall is attacked 
and consumed from the lumen of the ceU inward towards the 
middle lamella, but it differs in that the medullary rays and 
vessels are the first elements to disappear. 
In longitudinal section the walls of the fibres are found to 
be discontinuous ; this accounts for the irregular fracture in 
that direction. 
As already stated, the mycelium completely fills all the 
elements of the wood, or the spaces where these have been 
consumed, and forms with the remains of the wood one solid 
mass. Where the wood elements have disappeared, the 
mycelium which originally filled the lumina retains the 
outlines of the latter to a great extent. This is specially 
noticeable in the case of the vessels. Three elements may 
be distinguished in the mycelium. The least numerous are 
thin-walled, normally -shaped h5rphæ, 2-3 ^ diameter, with 
evident protoplasmic contents. More abundant than these 
are other normally-shaped hyphæ of the same uniform 
diameter, but réfringent, rigid, with thickened walls. These 
latter predominate along the sites of the medullary rays ; they 
frequently bear small globose bodies, resembling conidia in 
