100 BBITISH FKESHWATEE EHIZOPODA. 



freshwater and not marine, and their affinities can 

 only be clearly seen in a classification which includes 

 both freshwater and marine forms. Authorities 

 usually have confined themselves to one group, e. g. 

 Rhumbler (1904) omits the filose Rhizopoda, Averint- 

 zeff (1906) deals only with freshwater forms, and in 

 general works by such authors as Ray Lankester and 

 Calkins some of the genera are either not included or 

 not given a definite position. 



In the following list of genera the forms interme- 

 diate between the Euglyphina and the Gromiina are 

 placed in a new sub-family, the Pseudo-gromiinse. 



Family 3. Gromiina. 

 Sub-family Pseudo-geomiin^ s.-f. no v. 



Pseudopodia filose, arising directly from the plasma. 

 Genus (1) Lecythium. 

 „ (2) Pseudodifflugia. 

 ,, (3) Diaphoropodon. 

 „ (4) Clypeolina. 

 ,, (5) Frenzelina. 

 „ (6) Gromia. 



Sub-family Allogeomiin^ Rhmnbler. 



Pseudopodia reticulate, arising from a peduncle. 

 Genus (1) Microgromia. Freshwater. 



(2) Lieherhuehnia. Freshwater and marine. 



(3) Allogromia. Freshwater and marine. 



(4) Diplogroviia, Freshwater. 



(5) Shepeardella. Murine. 



(6) Rhynchngromia.. Freshwater and marine. 



(7) Rhynchosaccus. Marine (parasitic). 



(8) Hyalopus. Marine. 



In the Pseudo-gromiinse the normal method of 

 multiplication is by division ; in the AUogromiinse 

 sporulation is probably the normal method, although 

 in Microgromia a division of the plasma within the test 

 takes place, and simple division may occur in other 

 genera. 



