Word: cilia
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Dates: during 1920-1929
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...animal life reproduced at the Museum there are water fleas, protozoa (single-celled animals), insect larvae, and rotifers. The rotifers, most interesting, give their name to the entire exhibit. The commonest kinds are shaped like tops. The rotifer head is round and surrounded at the flat shoulder with fine cilia which vibrate (in life) so rapidly one after another around the circle of shoulder that the whole body seems to rotate. They are voracious and pugnacious, crouching on a microscopic plant and then swiftly springing at a stray water flea, a protozoa, a bit of leaf...