200 BOTANICAL GAZETTE [MARCH 
rapidly streamed to the wettest portion, and then began to aggregate 
into an extended aethalium. The drying, however, took place so 
rapidly that the entire plasmodium had not time to withdraw itself 
from the filter paper, and therefore it dried zx se¢u, leaving a character- 
istic network of dry anastomosing threads. The reproduced photo- 
graph was taken by Mr. W. H. 
Walmsley just before the moving 
plasmodium was placed in the sun- 
light. 
Beneath the bell jars, as the dis- 
integration of the fungi proceeded 
with the production of a watery fluid 
and a gelatinous substance of a ropy 
consistency, the more active proto- 
plasmic masses confined themselves 
to the tougher portions (the stipe and 
main substance of the pileus), heap- 
ing up on these portions in the con- 
centrated effort to digest them. With 
the drying of the interior of the bell 
jars, condensation of the reticulum 
took place, so that the meshes became 
smaller and the anastomosing streams 
more closely aggregated. At this 

Fic. 1.—Moving plasmodium of 
Huligo septica on moist filter paper, begun by feeding Fuligo various sub- 
showing the varicose condition of the stances. 
recticulum while actively streaming. At 1:30 P.M. Tuesday, November 
6, pieces of fresh young Pleurotus 
were placed upon the living plasmodium. At 2:15 p.m. the small 
pieces used were invaded and the plasmodium had spread over about 
half of the superficial surface of the fungal food. Pieces of young 
pilei of Coprinus comatus were placed on different spots of the same 
plasmodium, and by 2:15 P.M. invasion had well advanced, but the 
rapidity of forward movement was much less when Pleurotus was used 
as a food. Two hours after the two food substances had been placed 
within reach of the streaming protoplasm, complete covering of the 
specimens had occurred. 
Pieces of a partially dried toadstool, Hypholoma perplexum, were also 
