66o 
Fritsch.—Two Fungi , parasitic 
its interior. Branches of the internal mycelium also serve to 
convey the Fungus from one individual to another. 
I give the following measurements of this species : — 
Diameter of the internal mycelium = -005 - -008 mm. 
„ „ external „ = -0015 - -005 mm. 
„ „ spores = -oi2 - *015 mm. 
A few remarks may be added on the bearing of the facts, 
described in this paper, on the systematic position of the 
genus Resticularia. As far as I am aware, the formation of 
spores on external branches of the parasitic mycelium is 
a feature as yet unobserved in the Ancylistaceae ; and in 
the two species under consideration this is evidently a common 
method of propagation. Whereas the species, which I have 
provisionally united with R. nodosa , Dangeard, forms thick- 
walled chlamydospores, R. Boodlei has thin-walled spores, 
incapable of standing a long resting-period. Undoubtedly 
this latter species also forms chlamydospores of some kind, 
enabling it to pass through unfavourable external conditions ; 
and it remains to be seen whether R. nodosa does not also 
form thin-walled spores at some period in its life-history. 
Since the observations contained in the preceding pages 
tend to cast considerable doubt on the sexuality of R. nodosa , 
one of the chief links connecting the genus in question with 
Ancylistes is removed. According to Pfitzer’s description 
(’72, p. 379), there are undoubted dioecious sexual organs in 
this latter genus. 
In many respects, however, Ancylistes and Resticularia are 
similar to one another, and it will be best for the present to 
leave them side by side ; although further observations may 
make it advisable to place the latter genus in a separate 
section of the Ancylistaceae 1 . Renewed observations may 
1 Quite recently v. Deckenbach has published an interesting treatise on a new 
Fungus parasitic in marine species of Calothrix ( Coenomyces consuens , nov. gen. 
nov. spec., Flora, Bd. xcii, 1903, pp. 253-83, PI. VI and VII), which further 
contains a lengthy discussion of the phylogenetic relationships of the Fungi. 
Coenomyces possesses a well-developed septate mycelium, and is propagated by 
means of uniciliate zoospores (the only method of reproduction observed) ; owing 
to the occurrence of these two characters side by side, which are considered as 
