Diatoms, many different forms – Euglena, green flagellate weed – Paramecium, ciliates from hay-infusion – Daphnia, water flea – Cyclops, a copepod w.m. – Desmids, mixed (Desmidiaceae) – Mixed plankton from fresh water – Hydra t.s. of the body – Planaria t.s. of body of a flatworm – Bacteria from putrid water.