The head extends from the top of the vase, and is surmounted with the usual cilia, or wheel, which we see among all the Rotifera.
Rotatoria (rta, a wheel) or Rotifera (rota and fero, to bear).
Such small creatures as Daphnia pulex, Cyclops quadricornis and Rotifera should be introduced into ponds.
The Cyclops feed on smaller aquatic animals such as Protozoa, Rotifera, etc.
Others, again, include the Rotifera in the second subdivision.
Those examples are provided by Rotifera (inferior worms) and by Ephemerid.
In the radiated forms of the Rotifera, and the simple structure of the polypi rudes, we are reminded of the radiata.
See an account of the Rotifera and their faculty of repeated vivifaction, in the note appended to this chapter.