ROSSI MYCETOZOA IN THE CHINGFORD DISTRICT. 193
The list of species found by me in August and September 1915 is :—
Badhamia utricularis Berk. (August and September).
Physarum viride Pers. (August).
P. nutans Pers. (August and September).
ditto, subspecies leucophaeum Lister (Aug. and Sept.).
P. vernum Somm. var. iridescens (Aug. and Sept.).
Fuligo septica Gmelin (Aug. and Sept.),
Craterium minutum Fries. (Aug. and Sept.)
C. leucocephalum Ditm. (Aug. and Sept.).
C. aureum Rost. (Aug.)
Leocarpus fragilis Rost. (Aug. and Sept.).
Diderma floriforme Pers. (Sept.)
Colloderma oculatum G. Lister (Aug. and Sept.).
Didymium clavus Rost. (Aug. and Sept.).
D. melanospcrmum Macbr. (Sept.).
D. nigripes Fries. (Aug. and Sept.).
D. squamulosum Fries, (Aug. and Sept.).
Stemonitis fusca Roth. (Aug. and Sept.).
S. herbatica Peck. (August and Sept.).
S. flavogenita Jahn (Aug. and Sept.).
Comatricha nigra Schroeter (Aug. and Sept.).
C. pulchella Rost. (Sept.).
C. typhoides Rost. (Aug. and Sept.).
Enerthenema papillatum Rost. (Aug.).
Lamproderma scintillans Morgan (Aug. and Sept.).
Diclydiaethalium plumbeum Rost. (Sept.).
Reticularia lycoperdon Bull. (Aug. and Sept.).
Lycogala epidendrum Fries. (Aug. and Sept.).
Trichia affinis de Bary (Aug.).
T. decipiens Macbr. (Aug. and Sept.).
T. botrytis Pers. (Aug.).
Arcyria cinerea Pers. (Aug. and Sept.).
A. pomiformis Rost. (Aug. and Sept.).
A. denudata Sheldon (Aug. and Sept.).
A. incarnata Pers. (Aug. and Sept.).
A. nutans Grev. (Aug. and Sept.)
The summer rains of 1916 were not so penetrating as those of the
year before, and mycetozoa were less frequently found. The number
of species recorded for August and September 1916 was 26 ; four species
occurred which are not included in the above list :—namely : Ceratiomyxa
fruticulosa Macbr., Cribraria aurantiaca Schrad., Trichia varia Pers.,
and Arcyria (Erstedtii Rost. The genus Arcyria was uncommon, A.
nutans being seldom found, but the discovery of A. aerstedtii (the first
record for Essex) was a compensation for the poor appearance of the
genus. Cribraria aurantiaca, a species usually found on pine logs and
stumps, turned up on oak.