Food taken in by pseudopodia at any part of the body.
Order 1.--HOLOMASTIGACEAE. Body homaxial with uniform flagella.
_Multicilia_ (Cienkowski); _Grassia_ (Fisch, in frog's blood and
gastric mucus).
Order 2.--RHIZOMASTIGACEAE. Flagellum 1, 2 or few, diverging from
anterior end. _Mastigamoeba_ (F.E. Schulze).