Includes:
1. Diatoms, many different forms.
2. Euglena, green flagellate.
3. Paramecium ciliates from hay-infusion.
4. Daphnia, water flea.
5. Cyclops, a copepod whole mount.
6. Desmids, mixed (desmidiaceae)
7. Mixed plakton from fresh water.
8. Hydra transversal section of the body.
9. Planaria transversal section of body of a flatworm.
10. Bacteria from putrid water.