in vivo

Description:

Portrait of euglena acus (Ehrenberg,1830). Cell body is an elongate cylinder with a sharply pointed posterior end. The flagellum is about one-fourth the body length; Delicate pellicular striations are difficult to see without DI. The small discoid chloroplasts are numerous. Paramylon bodies are rod-shaped. The nucleus iscentral. The stigma is prominen. Moves sluggishly among debris. Collected from the slow-moving organically enriched outflow from a pond near Boise, Idaho. DIC.