The numbers of every species but one had dwindled; what I believe to belong to the genus Chaetogaster, however the sources on this particular genus were scant.
These were segmented, spotted worms with hairs. They were quite larger than any other organism i had observed in this experiment. The entire population seemed to have flocked to one strip of water against the side of the glass that was separated from the rest by a large air bubble and the Amblestegium sp. Moss. They had formed a sort of tunnel and were bundled inside of it. In general, they were quite difficult to photograph.
Here is one at 40x.
Here is the head of one poking out of some soil.
(Sources: http://www.youtube.com/watch?v=BV-Ao3pslfU&feature=related &
http://www.microscopyu.com/moviegallery/pondscum/chaetogaster/)
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