PREFACE. 



IN the present volume are described those species 

 of Rhizopoda which belong to the genera treated in 

 Volumes I and II and had not been recorded from 

 the British Isles when those volumes were published, 

 also such British species as have since then been first 

 described. 



Since the death of Mr. Cash in 1909 very few 

 records of Rhizopoda occurring in the British Isles 

 have been published except those by Mr. J. M. Brown 

 and myself ; from these this volume of supplementary 

 species and varieties is compiled. 



Owing to my absence abroad, and occupation on 

 work connected with the war during the last three 

 years, my own records consist almost entirely of those 

 obtained from the gatherings made by myself or sent 

 to me by friends which are acknowledged in the 

 preface to Vol. III. From these gatherings also 

 were obtained numerous records of localities in which 

 occur most of the Conchulina and many of the 

 Amoebina described by Cash, thus sufficing to show 

 that the' majority of the species described in Vols. I 

 and II are generally distributed over the British Isles 

 wherever the habitat is suitable, 



