Certain compound animals, or zoophytes, as they have been termed, namely the Polyzoa, are provided with curious organs called avicularia.
"On the Origin of Species" by Charles Darwin
It appears sometimes to be parasitic upon other polyzoa, and is then much smaller.
"Narrative Of The Voyage Of H.M.S. Rattlesnake, Commanded By The Late Captain Owen Stanley, R.N., F.R.S. Etc. During The Years 1846-1850. Including Discoveries And Surveys In New Guinea, The Louisiade Archipelago, Etc. To Which Is Added The Account Of Mr. E.B. Kennedy's Expedition For The Exploration Of The Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist To The Expedition. In Two Volumes. Volume 1." by John MacGillivray
CLASS I. POLYZOA ("Sea-Mosses").
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
Yet the echinus can have, at the best, none but the most distant genetic relationship with the Polyzoa.
"On the Genesis of Species" by St. George Mivart
Harmer in Polyzoa (1893).
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
Of the sponges and polyzoa of Ceylon we know as yet too little to make it profitable to discuss their affinities.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
There are two divisions of the Polyzoa, the Ectoprocta and the Endoprocta.
"Stories of the Universe: Animal Life" by B. Lindsay
Corallines (bryozoa, polyzoa, &c.), cephalopods (e.g.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various