LISTER I THE STUDY OF MYCETOZOA IN BRITAIN. 23 I 
of the cup ; the turbinate shape of the sporangia, the orange- 
red colour of the mass of spores, the large size (8 M ) and rough¬ 
ness of the spores are all characteristic of C. rufa. 
Dictydium cancellatum (Batsch) Macbr.—Not common • 
•occurring in abundance on a stump in Wanstead Park for two 
years in succession ; also found by Mr. Ross near Chingford ; 
var. fuscnm Lister was also found in Wanstead Park on the 
same stump as the typical purplish-red form. This species 
usually appears in summer and early autumn. 
Tubifera ferruginosa Gmel.—Occurring in summer and 
autumn on dead wood. Rare in this district; I know of one 
gathering only, which was made by Mr. T. Petch, in Wanstead 
Park, in October, 1904. 
Dictydiaethalium plumbeum (Schum.) Rost.—Not uncommon 
■on logs and wood-piles, from late summer to winter. 
Enteridium olivaceum Ehrenb.—Occurring on logs in autumn 
and winter, not common ; the aethalia are far less conspicuous 
when mature and olive-brown than they are in the immature 
rosy stage. 
Reticularia Lycoperdon Bull.—Abundant on dead wood 
from May to September. 
Liceopsis lobata (Lister) Torrend.—This species was described 
from specimens found within a big hollow stump of Spanish 
chestnut in Wanstead Park in July 1887-8. It has since been 
recorded from Surrey, Bedfordshire, Shropshire, Cheshire and 
Flintshire, and in Europe from the Jura mountains and the 
Pyrenees. 
Lycogala epidendrum (L.) Fries.—Very abundant on dead 
wood from summer to early autumn, rarely appearing in the 
winter months. 
Trichia affinis De Bary.—Abundant on dead wood and occur¬ 
ring throughout the year in favourable seasons, but most 
frequent in autumn, winter and spring. 
T. persimilis Karsten.—Even more abundant than the 
preceding, and occurring in similar situations and in the same 
seasons. 
T. scabra Rost.—Not unfrequent on old stumps, appearing 
from July to December ; it can be distinguished in the field 
by the rich orange colour of the spores and elaters. 
T. varia Pers.—Very abundant on dead wood from autumn 
to spring, and often forming large developments. 
