Science Art: Plate C from The rotifera; or, Wheel-animalcules, both British and foreign, 1889

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Teeny tiny critters, hanging out in the water. They’ve got cilia in a circle, waving around their tops as if they were wheels, spinning.

A glimpse of the microscopic world from The rotifera; or, Wheel-animalcules, both British and foreign, by C.T. Hudson.