Bowerbankia

(from the article `moss animal`) ...meaning `outside anus`). If zooids are disturbed, they withdraw their tentacles inside the body cavity. Only if the zooids have transparent walls, ...
Found on http://www.britannica.com/eb/a-z/b/101

Bowerbankia

Bowerbankia is a genus of Ascidioid Polyzoa, of the family Vesiculariadae, named after James Bowerbank the English geologist.
Found on http://www.probertencyclopaedia.com/browse/BBA.HTM
No exact match found