Martin—Taphrina Coryli Nishida on Corylus. 
353 
11. Vacuolar membranes appear to be the active agents in the 
formation of the spores. 
12. Conidia are produced by the lengthening of the spore, 
followed by its constriction into two cells of unequal size, the 
smaller growing to equal the larger before separation. The pro¬ 
duction of conidia is stimulated by chilling. 
13. Primary conidia produce secondary conidia which germ¬ 
inate on artificial media to form short hyphae. 
I wish to express my thanks to Professor E. M. Gilbert, who 
suggested this work, for his assistance and encouragement. 
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