BRITISH 

 FRESHWATER RHIZOPODA. 



DURING the publication of the earlier volumes 

 of this monograph records of several genera and 

 numerous species and varieties of Freshwater Rhizo- 

 poda have been added to the British Fauna. 



When the third volume was issued fifty genera had 

 been described, now by the addition of Pyxidieula, Cap- 

 sellina, Diplochlamys, Microcorycia, Sullinula, Cucur- 

 bitella, Averintzia, Parmulina, and Plagiophrys, and 

 the omission of Ouramoeba, the number is increased to 

 fifty-eight. In this volume descriptions are given of 

 the genera, species, and varieties thus added to our 

 list. They include six newly-described species : 



Gapsellina timida. Hyalosphenia ovalis. 



Microcorycia radiata. Nebela tubulata. 



Cryptodifflugia eboracensis. N. scotica. 



In the following enumeration of the genera the 

 original arrangement and numbering is retained for 

 the sake of easy reference. Quadndella is substituted 

 for the pre-occupied name Quadnda (26) and Ouramoeba 

 (6) is omitted as it has been found to be an Amoeba 

 with parasitic algae as explained in Vol. II (p. viii). 



Order I. AMCEBINA. 



Family 1. LOBOSA. 



(1) Amoeba, (2) Dactylosphserium, (3) Mastigamceba, 

 (4) Pelomyxa, (5) Lithamosba. 



VOL. iv. 1 



