Colpoda (col-poe-da) is arguably the most common of all soil ciliates. Comma-shaped, flattened, cilia all over body. Cilia usually in pairs. Depression of body leads to the mouth region where there are lines of oral cilia - seen in this micrograph a little way 2 o clock from the centre of the cell. Usually eats bacteria. Can form cysts which resist drying up. Phase contrast.