2. Body plastic; usually with Family _Euglenidæ_
chromatophores and eye-spot
Body plastic; no chromatophores; Family _Astastidæ_
no eye-spot
Family _Euglenidæ_:
Body _Euglena_-like, inclosed Genus _Trachelomonas_
in shell with round opening for
exit of flagellum
Family _Astastidæ_: