THE ESSEX FIELD CLUB. 173
and Dicranoweissia cirrhata, both in fruit; Fissidens adiantoides, and Barbula
rigidula, the latter being, it is believed, a new record for Epping Forest.
Mr. Thorrington reported that he had noted six species of ferns that
day, namely, Polystichum angulare, Lastrea filix-mas, Lastrea dilatata,
Scolopendrium vulgare, Pteridium aquilinum and Asplenium trichomanes,
this last a surprising occurrence, but the specimen found was evidently
naturally grown, not likely to have been planted. The large
horsetail, Equisetum Telmateia, was also found.
Ptilidium pulcherrimum was the rarest liverwort noted, in the same
station as last year.
Mr. Paulson reported a list of 15 lichen-species noted during the foray :
he contrasted this meagre total with the 50 mosses found, and considered
that the cause was to be sought in the comparative impurity of the
atmosphere anywhere near London, of which impurity lichens were much
more intolerant than were the mosses. Cladonia denticulata, C. sylvatica
(the "reindeer-moss"), Baeomyces roseus and Diploschistes scruposus
were interesting forms met with that day.
Miss Lister reported a "bag" of 14 myxomycetes, which was quite
as many as could be expected in view of the frosty weather of late.
The President referred to the algae noted during the foray, and said
he hoped that these lowly but fascinating plants might be specially sought
for and recorded on future Cryptogamic Forays. He referred to the
impossibility of certainly identifying many of the alga1 in the field without
microscopic examination, but we had found during the day examples of
Volvox aureus, Eudorina, Closterium and other desmids in the Forest pools,
and what was probably Hormidium flaccidum on damp ground.
A hearty vote of thanks was passed to the conductors and referees,
and a pleasant and successful expedition thus brought to a close.
ORDINARY MEETING (634TH MEETING)
SATURDAY, 26TH NOVEMBER, 1927.
This meeting was held as usual in the Physics Lecture Theatre of the
Municipal College, Romford Road, Stratford, on the above afternoon,
the President, Mr. T). J. Scourfield, I.S.O., F.L.S., etc. in the chair. 68
members and visitors were present.
Mr. Avery (whose reappearance after his illness was warmly welcomed),
exhibited some 30 Essex prints and portraits, recently acquired by him
from the Bird Collection.
Mr. Paulson showed some lantern-photographs and specimens of
seedling-leaves of the Common Teasel, exhibiting two forms of glands.
The Hon. Secretary exhibited a herbarium-series of Swiss plants, col-
lected by himself in the Bernese Oberland.
He also exhibited four Barbel, mounted in a glazed exhibition-case,
which had just been given to the Stratford Museum : the fish were caught
in the River Lea, at Walthamstow, in 1880.
The President exhibited, under microscopes, sand-grains agglutinated
by the alga, Scenedesmus antennatus, from the margin of a pond at Ley-
tonstone : it appeared to be a pure culture of this alga, which has only
once before been recorded from this country.
Messrs. Paulson and Thompson, as delegates of the Club, briefly re-