INTRODUCTION. 19 



mens and useful suggestions ; and to Professor Macbride, of Iowa, 

 and Mr. Morgan, of Ohio, for a fine series of the Mycetozoa from 

 their respective districts ; also to Dr. Haviland for specimens of 

 great interest from Borneo. Mr. Camrn, of Smethwick, and Mr. 

 Saunders, of Luton, have supplied me with many scarce British 

 species ; and to Mr. Phillips and Mr. Massee I am obliged for 

 kindly entrusting me with their collections for examination. 



The Plates in this work are collotype reproductions of water- 

 colour drawings made under the camera-lucida and reduced to 

 half the originals ; the descriptions of the spore sculpture in the 

 text must therefore be understood as giving the appearance when 

 magnified 1200 diam., Zeiss yVth obj. 



1 have further to mention that throughout my studies of the 

 Mycetozoa, and in the preparation of the drawings illustrating 

 this work, I have had the assistance of my daughter, Gulielma 

 Lister. 



