Note:  Do not rely on this information. It is very old.


Bell-animacule, or Vorticella, a bell-shaped infusorian that grows attached to water plants, fish, floating wood, etc., by a thin contractile stalk; they usually live in colonies. The free end of the bell is closed by a disc surrounded by a circle of cilia and perforated by the mouth. The usual method of reproduction is by fission, but a sexual method sometimes occurs.