1897 THE MICROSCOPE. 127 
end of 48 hours forms a rich felt of dine whitish threads. 
On gelatin in Petri dishes, at the room temperature 18-20° 
C. in three days the mycelial growth may be 2 to 3 cm. 
across, and the spores commence to be formed. These are 
borne on ascending branches, which are septate, and at 
the ends branch quite richly. On the ends of the 
branches chains of small, circular or slightly oval spores 
are borne, sometimes as many as thirty in a chain; the 
spores are smooth, light-greenish in color, and give to 
the mould a distinct bluish-green color when sufficiently 
EXPLANATION OF THE FIGURES. 
a, Spore with Mycelium filaments (Penicillium crusta- 
ceum). b, Spore cluster (schematic.) c¢, Sterigma. 4d, 
Spore. e, Spore head of Mucor racemosus with spores 
within. f, Spores. g, Schematic representation of myce- 
liam and spore case with secondary branches. h, Chlam- 
ydospores op mycelium. 
numerous, which gave the name glaucum to the species. 
In some medicinal solutions especially those with small 
percentage of sugar, this mould grows luxuriantly, des- 
troying the solution both from a pharmaceutical as well 
as medicinal standpoint. 
The organism next in frequence was a mucor—Mucor 
