408 POLYMORPHIC FUNGI. 
scribed species of Penicillium with which this new mould would 
agree, it was named Penicillium chartarum. 
Almost simultaneously, or but shortly after the perfection of 
the spores of the Penicillium, other and very similar patches ap- 
peared, distinguished by the naked eye more particularly by their 
dendritic form (Fig. 79, e). This peculiarity seemed to result 
from the dwarfed habit of the third 
fungus, since the varnish, 
though cracked and raised, 
was not cast off, but remained in small 
angular fragments, giving to the spots their 
dendritic appear- 
ance, 
the dark spores of the fungus protruding through the fis- 
Fig. 79. sures. This same mould 
was also found in many 
cases growing in the 
same spots amongst 
Penicillium chartarum, 
but whether from the 
same mycelium could 
not be determined. 
The distinguishing 
features of this fungus 
consist in an extensive 
mycelium of delicate 
threads, from which 
arise numerous erect 
branches, bearing at 
a, Part 
Preuss: 6, spores of 
early conditio n of spor res of the same: : 
of Spori dé smium aiternaria, showing myee lium | with erect times the branches are 
threads and spores; ¢, dendritic pateh of Sporide 
the apex dark brown 
of chain ot spores of A ` 
naria char f 
7 me 
, suppos seq] opaque spores. Some 
1 ‘ 
ê: d. mode: growth 
alternaria, natural size, showing its habit, again shortly branched, 
but in the majority of instances are single. The spores are sep- 
tate, sometimes with two, three, or four divisions, many of them 
again divided by cross septa in the longitudinal direction of the 
er ee ee to give a muriform appearance. As far as the struct- 
ure and appearance of the 
> aro very 
spores are concerned, they are Ve 
similar to those of 
Sporidesmium polymorphum p consequently 
specimens were published as a variety of that species, but toem 
curacy of this determination is open to very grave doubts. The 
mycelium and erect threads are much too highly deve sloped for # 
good species of Sporidesmium, and cert: ainly 50 for the spec ies to 
f h 
which they were referred, so that in the ** Handbook of Britis 
