CONTENTS 
rAot 
North American Species of Ascodesmis Fred J. Seaver i 
Fungi Producing Heart-rot of Apple Trees B. O. Dodge 5 
Uredinales of Porto Rico Based on Collections by F. L. 
Stevens - - - - - J. C. Arthur 16 
Myxomycetes from South America - William C. Sturgis 34 
Studies in Porto Rican Parasitic Fungi — II Esther Young 42 
Index to Illustrations of Fungi I-XXII 
William A. Murrill 47 
Notes and Brief Articles 52 
Index to American Mycological Literature - - - 59 
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