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EXPLANATION OF PLATES VIII-X 
PLATE VIII 
Fic. 1.—Two perithecia of Gnomonia ulmea in almost mature condition, 
showing interascicular pseudoparenchyma, and also elongated beaks and 
periphyses-lined ostiolar canal. 
Fic. 2.—Early stage in development of perithecium of Gnomonia ulmea, 
showing position in palisade layer; subcuticular stroma above has given rise 
to acervulus of imperfect form of fungus, Gloeosporium ulmeum. 
