Note 2 — Chapter XIII · PLIOCENE PERIOD
Reading edition
Ehrenberg proposed in 1831 the term Bryozoum, or “Moss-animal,” for the molluscous or ascidian form of polyp, characterised by having two openings to the digestive sack, as in Eschara, Flustra, Retepora, and other zoophytes popularly included in the corals, but now classed by naturalists as mollusca. The term Polyzoum, synonymous with Bryozoum, was, it seems, proposed in 1830, or the year before, by Mr. J. O. Thompson.