Plate XXIII 
Plate XXIII. Figures 1 to 9 show spores frcm potato plug cultures, two 
weeks old, grown in the refrigerator at a temperature of 8° to 10° C. 
X 1000. Figures 10 to 17 and 19 to 26 show various degrees of deve'op- 
ment of the basal cell of spores from cultures on potato plugs, two 
weeks old, in a refrigerator at a temperature of 8° to 10° C. X 1000. 
Figure 18 shows the apical cell of a spore from the same culture as 
figures 10 to 17. X 1000. 
