I definitely noticed an increase in diversity this week. Still noticeably present were the rotifers Lecane. Additionally, I noticed a large number of green algae, identified as Phacus in How to Know Freshwater Algae by G. W. Prescott. I also observed two of the Difflugia I identified earlier in the semester, illustrated in a 40x image below. 
The largest part of my time in lab this week was spent observing a previously unidentified organism in my MicroAquarium. For the first time this week, I observed Dileptus (identified in fig. 391 of Freshwater Invertebrates of the United States: Protozoa to Mollusca by Robert W. Pennak) a large ciliate (it can be up to 1 mm in length) with a proboscis and a mouth at the base. Shown below is video of this organism, displaying the cilia lining its body and its distinctive mouth, as it interacts with a rotifer.
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