224 THE ESSEX NATURALIST.
mentioned several forms which occurred frequently in the Forest but
which were very rare in his county.
The President, reviewing the remarks of previous speakers, defended
the continued use of well-known names, even if they were wrong, so long
as they were generally accepted.
Thanks were warmly accorded to the conductors, and the meeting
dispersed after further inspection of the day's collections.
The scientific results of the foray were excellent.
Mr. Pearson reports as follows :—
The total number of species found was 127. two of these being new
to the Forest, viz. :
Cortinarius (Dermocybe) azureus Fr.
Mycena bulbosa Cejp.
The last is a new record for Britain, though I have myself gathered it
in several places during the past Jew years. It grows in tufts of rushes,
and if these be pressed apart, this small white agaric will frequently be
seen growing at the base of the dead stems.
Here is its description :
Mycena bulbosa Cejp = M. juncorum Velenovsky
Pileus 11/2 to 2 mm. wide, convex, white or greyish white, striate.
Gills distant of two lengths, white, free (not touching stem).
Stem white-hyaline, polished, short, usually curved, with a minute
hairy striate bulb at base.
Basidia 4 spored.
Spores 9-10 x 31/2-41/2 μ pointed at one end.
Cystidia branched or digitate on edge of gill (not easy to observe
because the thin glutinous thread on edge of gill comes away, taking the
cystidia with it).
The surface of pileus is made up of globose or sack-shaped cells, with
apex round or papillate, 20 to 25 μ wide. Hairs of bulb about 4 μ wide.
Habitat : on dead stems in the centre of tufts of rushes.
This small Mycena is closely related to Mycena stylobates, from which
it differs in the glutinous nature of gill edge, the less obviously striate
disc and the habitat.
Another interesting species gathered was a black Craterellus which
for the present must be considered a variety of Craterellus cornucopioides
with the thick gills characteristic of a Cantharellus.
Earlier in the year (9th September, 1936) I gathered Ganoderma
resinaceum Boud., on a tree at Theydon Bois, and this also is a new record.
On the same date, also at Theydon Bois, I had the good fortune to
find the ascus-form of Hypomyces ochraceus (Pers.) Tul., which is very
uncommon, though the conidial form which grows on various species of
agarics and polypori is common.
Messrs. Wright, Pethen and Mann record, in British Birds for
November, 1936, the occurrence of a Bluethroat (Luscinia svecica) at the
Walthamstow Reservoirs on September 19th, 1936, and the following day.
This, with the exception of a doubtful record at Harwich (included by
Christy but rejected by Glegg) is the first record of this bird in Essex.
Editor.