PREFATORY 



TO 



SUPPLEMENTED EDITION 



Since the North American Cup-fungi (operculates) 

 was published in December, 1928, much added informa- 

 tion has come to hght, consisting of new and unreported 

 species, change of verdict regarding some of those listed, 

 and extensions of range of many of the species. The 

 amount of material is scarcely sufficient to warrant a 

 complete revision of the book, and it was thought best to 

 submit it rather in the form of a supplement, recording 

 the new information and many illustrations which were 

 not available at the time of the original publication. 



The same general system of illustrating is used, i.e. 

 a combination of photographs and drawings. While an 

 attempt has been made to keep these to a common scale, 

 since the drawings have been made at different times, 

 and with slightly different combinations of lenses, this 

 has not been done absolutely, and the reader must de- 

 pend upon measurements given in the descriptions rather 

 than the comparative sizes, as indicated in the illustra- 

 tions. A complete bibliography is appended. 



To avoid confusion the pagination as well as plate and 

 figure numbers is consecutive with that of the first 

 part of the work. 



New York, 1941. 



VI u 



