36 BRITISH FRESHWATER RHIZOPODA. 
CLASS SARCODINA. 
Protozoa naked or testaceous, possessing, in matu- 
rity, digitate, lobose, finely reticulate, or radiate 
pseudopodia, the latter with or without axial filaments. 
Reproduction by spore-formation or simple division. “ 
SUB-CLASS RHIZOPODA. 
Naked or testaceous Sarcodina, with pseudopodia 
of the lobose, digitate, acicular, or reticulate types. 
Adult forms amceboid; young (spores) amceboid or 
flagellate, produced by cell-division during life or 
following encistment. In some forms (e.g. Vampyrella 
vorav) individuals fuse to form plasmodia. 
Order I. AM(IBINA. 
Plasma-body naked. 
Family 1. Lozosa. 
Naked Rhizopods with lobose, or more or less digi- 
tate, elongate, sharply pointed or blunt pseudopodia, 
or with wave-like or hernia-like expansions of the 
ectoplasm. 
Genera: (1) Ameba, (2) Dactylospherium, (3) Masti- 
gameba, (4) Pelomywa, (5) Lithameba, (6) Ouraneba. 
Family 2. Rericunosa. 
Naked Rhizopods with filamentous anastomosing 
pseudopodia. 
Genera : (7) Gymnophrys, (8) Biomyvra, (9) Penardia, 
(10) Chlamydomyva. 
Family 38. VaAMPYRELLIDA, 
Naked Rhizopods with amoeboid movements and 
variable pseudopodia, sometimes radiate, simulating 
