COMMON MOULDS AND MILDEWS. 29 
tufts with short branches, upon which are borne obovate hyaline 
spores attached to the tips by delicate apicules. It may possibly be 
that this fungus is only the conidiophorous condition of Orbicula 
cyclospora, but this remains open for investigation. 
The Dematiei may now be considered, of which Stachybotrys 
lobulata, figured at a, is acommon form. ‘This is a black fungus, 
the flocci are septate and much branched, the apex of each fertile 
stem forming a small ramulose head or swollen receptacle, each 
ramulus being terminated by an elliptical spore containing two 
nuclei. Some spores are stated to be echinulate while others are 
smooth, but we have never met with any save the smooth variety. 
This species has been found upon damp linen, and upon cotton 
which had been placed in damp cellars, 
Another species the .S. a¢va, found growing upon damp millboard, 
is shown at 6. The spores are ovate and brown, but not so highly 
colored as in the former species. It is said they are never echinu- 
late, and are traversed by a thick septum. 
Another of the Dematiei, and one which was at first confounded 
with the Aspergillus genus, is Sporocybe alternata, and shown at 7. 
It is often found on damp paper, and is a very common fungus 
causing a black mildew upon cotton goods. It will be seen that 
the fertile flocci are branched alternately, the oblong sub-truncate 
spores being borne upon these, adhering to a slightly swollen 
receptacle. 
At o may be seen figured Periconia glaucocephala, which was first 
found on rotting linen at Kings Cliffe. The tufts are delicate, the 
stems short, and composed of a mass of compacted threads, which 
bear large ovate spores at their free ends. 
The next species is a very common fungus, and one to which 
we hardly like to apply a special name. It is the Cladosporium 
herbarum figured at ~, but which Tulasne has clearly indicated to 
be only a condition of Spheria herbarum. This fungus has 
been found upon damp linen, mildewed cotton, and in similar 
habitats, often in company with Jacrosporium chetrantht, which is 
also one of the Dematiei and is figured at w. Both these fungi are 
to be met with on all kinds of decaying substances, and both are 
probably different conditions of S. herbarum. The flocci of C. 
herbarum are olive brown or black, when mature, and the uniseptate 
olivaceous spores are borne from the sides or extremities of the 
aerial hyphe. In JZ. chetranthi the macrospores are borne upon 
short pedicels, they are dark multiseptate bodies as shown at w, and 
by no means uncommon. 
GZdocephalum roseum, which is figured at z, is the last of the 
Dematiei we can describe. It occurs as very minute tufts scarcely 
visible to the unassisted eye ; it is of a rose-pink color, the threads 
are equal, the heads subglobose, the spores are oval and smooth, 
