Definition of "cellariiform"

Cellariiform, the orifices nearly confined to the convex frontal and lateral surfaces; the basal surface with a strong median calcareous keel, almost concealed by a flat membranous epitheca, which covers the whole zoarium […]

1957, Sidney Frederic Harmer, The Polyzoa of the Siboga Expedition, page 1106

The cellariiform and reteporiform types are most dominant in a number of species and individuals.

1974, Tōhoku Daigaku, Science Reports: (Geology). Second series (volumes 45-46, page 95)