Friday October 30 I began to classify some of the several micro-organisms in my microaquarium. The number of organisms from my last observation have increased significantly and with the help of Dr. Macfarland I was able to begin identifying a few. The 1st picture above is an micro-invertebrate called a Cyclops (Pennak Fig. 35). It is the first one I've found in my micro-aquarium and after 30 minutes of observation it is the only I could find at this point. Picture #2 is another invertabrate a difflugia (Hayden Plate X). Unfortunately I could not determine the exact species of this particular difflugia. It too was the only one present in the system. Picture #3 is of a Euglena Helicoideus (Forest Fig. 386). I counted at least 3 of these my aquarium. It seems the most prolific organisms so far are parameciums and amoebas. I haven't added any additional food to the system yet which I plan to do next week.