1. Diatoms, many different forms.\r\n2. Euglena, green flagellate.\r\n3. Paramecium ciliates from hay-infusion.\r\n4. Daphnia, water flea.\r\n5. Cyclops, a copepod whole mount.\r\n6. Desmids, mixed (desmidiaceae)\r\n7. Mixed plakton from fresh water.\r\n8. Hydra transversal section of the body.\r\n9. Planaria transversal section of body of a flatworm.\r\n10. Bacteria from putrid water.