Note:  Do not rely on this information. It is very old.

Ectoprocta

Ectoprocta, the group of Bryozoa (q.v.) which includes nearly all the common forms. The characters are that the anus opens outside the ring or horseshoe-shaped series of tentacles (the lophophore), which is, moreover, placed behind the oral aperture; a large body cavity (coelome) is present. The group is divided into two divisions, the Phylactolaemata (q.v.), and the Gymnolaemata (q.v.).