102 Transactions British Mycological Society. 
Further details of the structure of this conidial fructification 
are most easily ascertained from these larger examples. Longi- 
tudinal sections show the following. 
Towards the top of the parenchymatous base, the cells, though 
still irregular, become more elongated in a longitudinal direction. 
This is more especially marked in the central portions. From 
these elongated cells, there arise short conidiophores which form 
a continuous disc over the upper surface of the parenchymatous 
base. The marginal cells of the base, however, give rise to long, 
septate hyphae which are united into fascicles. These fascicles 
converge above and constitute the conical apex. Viewed from 
the exterior they are long-triangular: in section they are several 
hyphae thick at the base, and in some cases there is, at the base 
of the fascicle, a distinct inner and outer layer of parallel hyphae 
separated by a layer of parenchymatous tissue which gradually 
becomes thinner and disappears at a short distance from the 
base. On the inner side of these fascicles there may be a small 
number of long, septate hyphae, similar to those which form 
the fascicles, but free, and constituting “ paraphyses.” 
The structure consequently resembles that of a Discomycete. 
The parenchymatous base is to some extent differentiated into 
a “‘hypothecium”’ of elongated cells which bear the conidio- 
phores, and an “‘epithecium”’ of more isodiametric cells. The 
long marginal hyphae arise from the uppermost cells of the 
“epithecium.”’ 
This structure is illustrated diagrammatically on Plate V, 
figs. 20 and 21. Fig. 20 shows the base and the tip viewed from 
the lower surface, the wall of the tip being shown as continuous. 
Fig. 21 is a longitudinal section of a well-developed specimen 
with a parenchymatous base and the teeth on the upper side 
longer than those on the lower. 
The conical tip was designated by Parkin a “‘loose sheath”’ 
in contradistinction to the “closely adherent sheath” of Micro- 
cera (Fusarium of Parkin). But, although it resembles the 
latter in being composed of long, septate hyphae, which are 
united by ladder connections, it differs from it in several par- 
ticulars. It is not a continuation of the outer layer of the base, 
but differs entirely in structure from the latter. It is composed, 
at least in the lower part, of several layers of adherent hyphae. 
It does not sheath the bases of the conidiophores but is a mar- 
ginal border to a slightly concave disc, and encloses a mass of 
detached conidia. 
In many cases, the hyphae which constitute the segments of 
the tip are not of the same length all round the disc. It has 
already been stated that the fructification is rarely erect, but 
usually horizontal and often oblique. The hyphae of the teeth 
