52 THE NORTHERN MICROSCOPIST. 
and he is often unwilling to admit that any form but this can be 
the fungus in question. The mature perithecia shown at fig. 7 
contain the asci which are further magnified at 8, and have in 
their interior, sporidia, the number of which is usually eight. The 
perithecia are minute and black, and the sporidia oblongo-elliptical. 
They are at first yellow, then brown, and are multicellular. 
The figs. 9-11 show the first formation of mycelium by the vege- 
tation of the spores, whilst figs. 12-14 illustrate the formation of 
conidia, which many have called, and still call, Cladosporium her- 
barum. It is described as C. herbarum in Dr. Cooke’s handbook, 
who writes as follows :—‘‘ Numerous species have been classified, 
but it is questionable whether they should not be united under 
this, which scarcely claims a place here as a distinct species, since 
Tulasne has indicated its affinity with Spheria herbarum.” 
COMMON MOULDS AND MILDEWS. 
(Concluded from page 30.) 
\ E now come to fungi of another order, the Sphzeriacei, of which 
the asci and paraphyses of Orbicula cyclospora are shown at 
s. This species was found on varnished wall-paper in company 
with . lanosum d', P. chartarum, and others. The asci and 
paraphyses are compacted within a dark, semi-membranous, semi- 
carbonaceous, reticulated perithecium, which is mouthless or 
closed, the paraphyses are branched, the asci cylindrical, containing 
globose hyaline spores. The outward appearance of this species 
is that of a small reticulated dark-brown ball seated on a distinct 
mycelium, much resembling, except as to color, the conceptacles 
of the so-called Eurotium herbariorum. 
The Alographum maculare, which is classified under the order 
of Phacidiacei 1 is shown at ¢; it was met with forming small black 
patches on an old mat, and ‘the illustration shows two of the asci 
containing the oblongo-clavate spores, which as a whole are con- 
tained within the elliptico-linear perithecium. 
Two members of the order Elvellacei are shown at J' and x, the 
former, eziza Pigottit, appears as small nearly hemispherical 
cups, growing on plaster ceilings. The hymenium is pale brick 
red with cylindrical asci, containing elliptical spores which possess 
a very distinct nucleus. The vegetative system or mycelium is 
white and downy, and which always precedes the growth of the 
cups. The /eziz@ are not by any means rare. 
The second fungus of the order is Ascobolus testaceus, which was 
found on old sacking and may also be found on rabbits’-dung. It 
is a brick red species, the paraphyses become slightly thickened as 
they rise upwards, the asci are broadly cylindrical, the general 
