What does annulata mean?
The definition of annulata
An`nu*la”ta, n. pl.
Etym: [Neut. pl., fr. L. annulatus ringed.] (Zoöl.)

A class of articulate animals, nearly equivalent to Annelida, including the marine annelids, earthworms, Gephyrea, Gymnotoma, leeches, etc. See Annelida.