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A class of Molluscoidea, including minute animals which by budding form compound colonies; -- called also Polyzoa.

Of or pertaining to the Bryozoa. -- n.

no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca.

See prehensile processes on the cells of some Bryozoa, often having the shape of a bird's bill.

An individual zooid of a bryozoan coralline, of which there may be two or more kinds in a single colony. The zooecia usually have a wreath of tentacles around the mouth, and a well developed stomach and intestinal canal; but these parts are lacking in the other zooids (Avicularia, Ooecia, etc.).

A genus of delicate branching corals, made up of minute cells, belonging to the Bryozoa.

An extensive suborder of marine Bryozoa, mostly with calcareous shells. They have a movable lip and a lid to close the aperture of the cells. [Also written Chillostomata.]

The common tissue which unites the various zooids of a bryozoan.

on of various Anthozoa, and of a few Hydrozoa. Similar structures are also formed by some Bryozoa.

Formerly any slender coral-like animal; -- sometimes applied more particulary to bryozoan corals.

A suborder of Bryozoa, usually having a circle of bristles below the tentacles.

A division of Bryozoa, in which the cells have circular apertures.

The free-swimming, bivalve larva of certain Bryozoa.

The outside covering of the Bryozoa.

An order of Bryozoa in which the anus lies outside the circle of tentacles.

The inner layer of the cells of Bryozoa.

A group of Bryozoa in which the anus is within the circle of tentacles. See Pedicellina.

A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta.

A genus of Bryozoa which produce delicate corals, often incrusting like lichens, but sometimes branched.

In Bryozoa, an organ extending back from the stomach. See Bryozoa, and Phylactolema.