250 Transactions British Mycological Soctety. 
preceding, the commonest habitat being the leaf-bases of 
coconut palms. I have also seen it often as an arboreal species 
on living Hevea and on several palms in the jungle, but the 
best developments are on Hevea logs. It is very liable to be 
eaten by insects. 
H. Serpula Rost. This also occurs on the leaf-bases of coconut 
palms both on the inner surface and on the persistent fibrous 
decayed sheaths. In such situations it is very common and can 
be found all the year round. Less frequently it appears on Hevea, 
and on one occasion I saw a small isolated specimen on a decayed 
jungle log. 
Arcyrnia ferruginea Sauter. The usual habitat of this species 
is the remains of Hevea logs and stumps in fire-pits, and on 
heaps of diseased lateral roots of Hevea; in both situations large 
colonies are fairly frequent. Occasionally it appears on fallen 
decaying branches of Hevea. 
A. cinerea Pers. This is much more common than the pre- 
ceding species. Large growths have appeared on the under 
surfaces of diseased Hevea tap roots which have been pulled up. 
It occurs sparingly on trunks of living coconut palms and on 
living Hevea trunks, the sporangia in such situations usually 
being very much scattered. A scattered form also occurs on 
living jungle trees. The “‘digitate”’ or clustered form is especially 
characteristic of developments of palm stems. 
A, denudata Wettst. This species is very’ common on fuel 
heaps of split timber and on small diseased roots of Hevea, 
especially those affected with Sphaerostilbe repens. 1 once 
gathered it on dead leaves of Gardenia, associated with Coma- 
tricha pulchella. It is very frequent on half-burnt logs and 
stumps in fire-pits. 
A. nutans Grey. Though not so abundant as the preceding 
species it is fairly frequent, and varies somewhat in colour from 
a decided buff to a browner tint somewhat resembling Arcyria 
ferruginea in older specimens. 
A. virescens G. Lister. This striking species was recently 
described by Miss G. Lister (see Journal of Botany, LIx. 252, 
Sept. 1921). The green spores at first led me to believe this was 
a form of A. glauca, but it differs from that species in the long 
dark stalks and stouter capillitium marked with groups of 
prominent bars. Much-faded specimens, from which most of the 
spores had disappeared, have several times been passed as over- 
faded Arcyria nutans. The species is not uncommon in Johore 
where it occurs on jungle logs, sometimes in colonies of con- 
siderable size. It has several times been found in Selangor on 
stacked fuel timber of various kinds. 
A. imsignis Kalchbr. and Cooke. I once found this species 
