134 The Botanical Gazette. [April, 
After growing for some time in a rather cool room, ata tem- 
perature ranging from 15-18°C., the culture was placed in 
the thermostat with a temperature of 25.6°C. Ina few days 
a profuse growth had taken place, making a distinct concen- 
tric ring. At the center was a strongly convex dense por- 
tion, separated from an outer ring which was elevated above 
the intervening portion. In the thermostat at the higher 
temperature this ring frequently became elevated consider- 
ably above the center of the colony. The margin of the 
colony presented a larger corona of radiating threads than 
would have appeared had the culture been kept at the lower 
temperature for the same time. 
By January 12th the colonies from the pure culture started 
Dec. 28th, examined with a low power of the microscope, 
show the loose cottony mass to be composed of numerous In- 
terwoven threads bearing short sporophores consisting of a 
single thread. Usually these were arranged ina monopodial 
fashion but sometimes they were opposite. These corte 
spond to the ultimate branches of the external layer of the 
clavula on the natural sporophores. Like them they are 
Surmounted by several short lanceolate basidia, the stemg 
mata of which bear long chains of spores, reminding oné 
very forcibly of the fructification of a Penicillium, though 
shorter sporophores. 
The illustrations in plate xIv are natural size reproduction 
of culture no. 3 at different stages of growth. In figs. 1 4% 
2, the colonies were not yet elevated above the medium, and, 
being transparent and very delicate, could not be photo- 
graphed by reflected light to show the peculiar characte — 
In figs. 3 and 4, the colonies were elevated at the centef 
above the medium. Figure 3 was photographed by ye 
mitted light to show the finely fimbriated margin of the © 
onies and the relation of the same to the denser Mader, © 
the colony. This photograph is not as good as it should 
under favorable circumstances, since by this time a 
dium had become milky in color from the entrance of pe 
Species of bacteria which had accidentally gotten into the of 4 
ture, a small colony of which can be seen on the milky ; 
right margin. The light transmitted through the me | 
portion of the medium also affected the sensitive plate ing : 
the differentiation between the colonies and the intervell = 
Spaces was not strong. It is sufficiently so, howevet, ” a 
a a ie as a, all OP le Lee ieee a | cee So 
