BRITISH 

 FRESHWATER RHIZOPODA. 



In the first volume of this monograpli forty-four 

 genera of Fresliwater Rhizopoda were enumerated as 

 represented in the British Isles, and in the second 

 volume, owing to the discovery in Britain of species 

 referable to Cryptodifflugia, Ajnphizonella, and Zono- 

 myxa, the number was increased to forty-seven. It is 

 now, by the addition to the British list of Paulmella 

 and Glypeolina, and the representation of Gromia by 

 Allogromia and Bhynchogromia, increased to fifty, 

 whilst Lecythmm is substituted for the pre-occupied 

 name Pamphagus. 



The arrangement of the genera is as follows : — 



Order II. CONCHULINA (continued). 



Family 2. Euglyphina. 



Grenera: (32) Euglypha, (33) Placocista, (34) Assu- 

 lina, (35) Sphenoderia, (36) Paulmella, (37) CypJwderia, 

 (38) Campascus, (39) Trlnema, (40) Gorythion. 



Family 3. Gteomiina. 



Grenera : (41) Lecythium, (42) Pseudodifflugia, (43) 

 Diaphoropodon, (44) Glypeolina, (45) Microgromia, (46) 

 Lieberhuehnia, (47) Allogromia, (48) Bhynclio gromia. 



Family 4. Amphistomina. 



Grenera : (49) Diplophrys, (50) Amphitrema. 

 VOL. III. 1 



