2 Mycetozoa of North America 



cotype. Authentic material : material determined and distributed 

 by the author as typical of the form described. 



My thanks are due to Miss G. Lister who, has extended her 

 kindly aid on many occasions. Also, to Mr. John D. Thomas and 

 Mr. Leon J. Chabot, who have accompanied me on many col- 

 lecting excursions; and to the many friends who have helped by 

 sending rare and unusual forms. The work of editing and proof- 

 reading has been done by Dr. John Hendley Barnhart, Bib- 

 liographer Emeritus of the New York Botanical Garden, to whom 

 I am greatly indebted. Mr. Joseph H. Rispaud, my constant 

 companion in the field, is part and parcel of this book. His wide 

 field experience, and indefatigable collecting activities, have made 

 possible the major portion of the material on which it is based. 

 My gratitude to him cannot be expressed in words. 



Robert Hagelstein 



MiNEOLA, New York 

 April 27, 1944 



