cellularia

from The Century Dictionary.

• In Cuvier's system of classification, the second family of the Corallifera, defined as having each polyp adhering to a horny or calcareous cell with thin walls, and no apparent connection with one another except by a very thin epidermis or by pores in the walls of the cells.
• The typical and only genus of the family Cellulariidæ. C. peachi is an example.