vi 



TABLE OF CONTENTS 



No. 5. September 



The Hypocreales of North America — IV, by Fred J. Seaver... 207 



The Nature and Classification of Lichens — I. Views and Arguments of 



Botanists Concerning Classification, by Bruce Fink 231 



No. 6. November 



The Agaricaceae of Tropical North America — IV, by William A. M'urrill. 271 



Schizosaccharomyces octosporus, by W. C. Coker and Louise Wilson .... 283 



The Rusts of Guatemala — II, by Frank D. Kern 288 



News and Notes 291 



Index to Volume III 295 



