640 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. VI. 
EXPLANATION OF.PEATE. 
CERCOSPORA EPIGH, E AND D. 
Fic. 1.—A leaf showing the angular spots on the surface of which the fasciculate 
hyphe are seated on minute pustules. 
Fic. 2.—A group of fertile hyphe. 
Fic. 3.—Conidia x 450. 
DOTHIORELLA CANADENSIS, E AND E. 
Fic. 4.—A bit of bark bearing the fungus. 
Fic. 5.—Horizontal section through conceptacle. 
Fic 6.—A sporule. 
HAPLOSPORELLA STAPHYLINA, E AND D-. 
Fic. 7.—Surface of a bit of bark of Staphylea trifolia, indicating the shallow eruptions 
produced by the stromata. 
Fic. 8.—Two of the conceptacles. 
Fic. 9.—A group of brown spores x 400. 
CERCOSPORA: CYPREPEDII, E AND D. 
Fic. 10.—The tip of leaf showing linear fungus spot. 
Fic. 11.—A group of fertile hyphe. 
Fic. 12.—Conidia x 450. 
DIPLODINA MACROSPORA, E AND E. 
Fic. 13.—A cornus twig showing eruptions of fungus natural size. 
Fig. 14.—The position of a perthicium between outer and inner bark. 
