membraniporidæ

from The Century Dictionary.

• A family of chilostomatous ectoproctous polyzoans, having the zoarium calcareous or membranocalcareous, the zoœcia forming an irregular continuous expansion, or in linear series with raised margins, and more or less membranous in front. It contains the genera Membranipora, Electra, Biflustra, Amphiblestrum, Megapora, and Foveolaria.