654 Fritsch. — ■ Two Fungi , parasitic 
can leave the host and emerge into the surrounding medium. 
In some cases this external mycelium becomes very much 
branched, and spores, in all respects similar to those formed 
on the internal hyphae, are developed on it by a kind of 
budding-process. Short lateral branches of the unseptate 
mycelium swell up apically, thus becoming capitate (Fig. 27). 
In these swellings, as they increase in size, large oily granules 
appear, whilst the thickened membrane finally becomes dif- 
ferentiated into two layers and takes on a dark brown colour ; 
the fully-developed chlamydospore is separated by a trans- 
verse wall from the mycelium on which it is borne (Fig. 28). 
The spores, formed in this way, are usually absolutely spheri- 
cal and are attached by a short stalk— the unaltered portion 
of the lateral branch — to the mycelium. Such spores were 
formed in great numbers during the previous month ; un- 
doubtedly they go through a resting-period, but of what 
duration I am unable at present to say. A comparison of 
the figures will show that these spores differ in no respect 
from those formed internally, and here it is certainly impos- 
sible to assume the occurrence of a sexual process. 
Although I have at present preferred not to give the 
Fungus just described a new name, it may turn out to be 
specifically distinct from R. nodosa, Dangeard. In this latter 
species branching is scarce, the spores contain a single large 
oil granule 1 and are apparently only formed singly, and 
zoospore-formation is apparently common. The dimensions 
of the spores agree fairly well. 
I give the following measurements of the Fungus described : 
Diameter of internal (parasitic) mycelium = *004—006 mm. 
„ „ external mycelium = *0005—001 mm. 
„ „ chlamydospores = *006—009 mm. 
2. Resticularia Boodlei, NOV. SP. 
This species was found parasitic in the filaments of a 
Tolypothrix , which formed the most characteristic feature 
1 Dangeard found that the spores of R. nodosa later came to contain a number of 
oily granules (loc. cit., p. 98) ; he interprets this as a stage preceding germination. 
