Those examples are provided by Rotifera (inferior worms) and by Ephemerid.
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.
Others, again, include the Rotifera in the second subdivision.
The Cyclops feed on smaller aquatic animals such as Protozoa, Rotifera, etc.
See an account of the Rotifera and their faculty of repeated vivifaction, in the note appended to this chapter.
