of Phoronis, [453];

of Polyzoa, [467], [470]

Ciliated, lappets, of Pterosyllis, [273] n.;

pits, of Polygordius, [244];

pits (= nuchal organs), of Polychaeta, [272] f.;

organs, of Capitelliformia, [305]

Cingulum, in Rotifers, [202]

Cirratulidae, [258], [325];

gill, [265];

tentacular filaments, [304] n.