3o6 lister : the haunts of the mycetozoa. 
On mossy trunks of both living and felled hornbeams, Colloderma 
'Oculatum has repeatedly been obtained in Epping Forest. 
Birch and Willow.— On the soft decaying wood of these 
trees, the dull red cushions of Tubifera ferruginosa may often 
be found. 
Ash. —On old ash timber, many Mycetozoa occur. In a 
wooded valley near the sea at Lyme Regis, fallen ash boughs 
are the favoured haunt of the rare Dianema depressum. This 
■species passes through a variety of colour changes as it matures ; 
emerging from the wood in white or rosy plasmodium, it soon 
forms into bright violet-coloured sporangia ; these eventually 
assume an inconspicuous drab colour, and harmonize exactly 
with the surrounding bark. If the sporangia were insects liable 
to be eaten by birds, one might exclaim “ What an excellent 
•example we have here of protective resemblance ! ” Yet who 
would venture to suggest that the dull hue of the mature 
Dianema protects it from foes—slugs and woodlice, creatures 
which, if attracted by bright colours, might have been par¬ 
ticularly tempted by the rosy and violet phases of the same 
sporangia in their younger, more juicy, and more palatable 
condition. On living ask trunks and hidden amongst liver¬ 
worts, Mr. N. G. Hadden found last winter, in Somerset, the 
small buff sporangia of Hemitrichia minor, a species recorded 
before only from Aberdeenshire and Japan. 
Elm logs often produce large growths of Badhamia panicea 
and, more rarely, of B. macrocarpa ; the plasmodium feeds on 
the decaying inner bast and creeps to the surface of the bark 
to form sporangia. The large pale aethalia of Lycogala flavo- 
jnscum have repeatedly been found on dead wood inside the 
hollow trunks of living elms by Mr. Charles Crouch, in Bedford¬ 
shire. Mr. Crouch writes :—“ I do not think the species is as 
uncommon as supposed, but it wants looking for ; my finding 
the last gathering was due to the blizzard of 1916, which 
removed half the elm and exposed its inside ; another specimen 
was found on an elm branch brought down by the same blizzard ; 
a third I should not have found if a bird or something had not 
tumbled it to the bottom of the tree.” 
Poplar. —On logs of poplar only has Badhamia populina 
been found hitherto in Britain : in the United States it has been 
•obtained on both poplar and Box-Elder (Acer Negundo). Peri- 
