MYCETOZOA FOUND IN EPPING FOREST. 31
provided four or five species, two of them somewhat infrequent
occurrences in the Forest.
Eight species recorded on November 26th were not found
on November nth. They were :—
Leocarpus fragilis (Dicks.). Rost. A large development
on twigs, leaves, etc., near High Beach.
Diderma radiatum (L.). Morgan, var. umbilicatum Meyl.
An extensive colony on bark on the underside of a birch log.
Diachea leucopoda (Bull.). Rost. On a decayed beech
leaf ; attacked by mould.
Colloderma oculatum (Lippert.) G. Lister. On a birch
stump not far from Ambresbury Banks, where it has been
found for three successive years.
Lamproderma violaceum (Fries). Rost. A very large but
weathered development on a willow log, leaves and herbage,
near Jacks Hill.
Cribraria argillacea Pers. On the same log as preceding;
attacked by mould.
Trichia persimilis Karst. Two colonies.
Arcyria ferruginea Sauter. A good development on a birch
log, but rain battered; both red and yellow sporangia.
My collecting on other days was mainly confined to the
Chingford area, the neighbourhood of the Warren (Loughton)
and Hill Wood at High Beach. It yielded 14 species not found
on November 11th and 26th, making a total of 40 for the
autumn. The earliest date included was September 29th,
following a dry spell, but that morning's hunt produced 13
species.
In 1933 I contributed to the Essex Naturalist (Vol. xxiv.,
Part 1, p. 62) a note on the occurrence of Colloderma oculatum
in Epping Forest, and referred to its having been found on
four logs and three living trees in a comparatively small area.
In the course of twenty years changed conditions, such as (i)
the falling away of moss-grown bark, (ii) the overturning of
logs, (iii) the development of lichen growth, coupled with a
less moist condition, and (iv) alteration in the drainage from the
pollarded crowns of standing trees, seem to have resulted in the
disappearance of the species from most of these sites. It was
with much pleasure, therefore, that I again found it on the