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HXPEANATION OF PIATE- 17. 
APPENDICULARIA ENTOMOPHILA, Peck. 
Leg of a fly bearing the fungus, magnified. 
A perithecium and its appendages more highly magnified. 
Tip of the perithecial rostrum with spores escaping from its 
apex, X 400. 
Three spores, x 400. 
SPHROGRAPHIUM HYSTRICINUM, Sace. 
Piece of bark bearing the fungus. 
A perithecium with spores escaping from its apex, magnified. 
Four spores, x 400. 
ASCOCHYTA CASSANDR&, Peck. 
A leaf spotted by the fungus. 
A perithecium and its matrix, magnified. 
Five spores, X 400, 
VENTURIA CASSANDRA&, Peck. 
A leaf spotted by the fungus. 
Two perithecia, magnified. 
An ascus containing spores, x 400. 
Four spores, xX 400. 
