It is usually present on Campanularian hydroids, but may be found on algæ and Bryozoa.
Bryozoa, "moss-animals," from some forming cells having that appearance.
The Bryozoa (sea-mats, etc.) are another and lower branch of the primitive active organisms which have adopted a sessile life.
This class of animals is also called Bryozoa, and certain species have the common names of sea-mats and corallines.
The name of Bryozoa, Moss-Corals, was formerly given to these growths.
A division of the Molluscoida comprising compound animals, such as the Sea-mat—sometimes called Bryozoa.
The germs of Bryozoa or of the fresh water sponges resist any amount of cold, but the full grown forms die at the first cold turn.
Most naturalists have now agreed to place among the Bryozoa certain species of animalcules which long remained imperfectly known.
Bryozoa, a group of minute animals which form encrustations on seaweeds and stones, 46.
Here occur also many compound Mollusks, especially a variety of Ascidians, and the highly colored stocks of Bryozoa.