Bryozoa

This class of animals is also called Bryozoa, and certain species have the common names of sea-mats and corallines.
The Sea-beach at Ebb-tide|Augusta Foote Arnold
Bryozoa, "moss-animals," from some forming cells having that appearance.
Marvels of Pond-life|Henry J. Slack
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.
Scientific American Supplement, No. 324, March 18, 1882|Various
Bryozoa, a group of minute animals which form encrustations on seaweeds and stones, 46.
The Biological Problem of To-day|Oscar Hertwig

More than 100 species of Polyzoa (Bryozoa) have been collected, among them are some highly interesting forms.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 3|Various