I.—Notes on new or imperfectly known Chalk Polyzoa

Extract

Zoarium always adherent, rarely large.

Zoæcia pyriform when not crowded, small, the earlier forms larger than the later, but individually very variable; area sub-triangular; a slight internal front wall, occasionally surrounded by a faint line; under the oæcia the rim is very thin, very low, and set distinctly back from the general curve.