EPIPHRAGM
Source: 567
Ep″i‐phragm (?), n. [] (Zoöl.) A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or æstivation.
Source: 567
Ep″i‐phragm (?), n. [] (Zoöl.) A membranaceous or calcareous septum with which some mollusks close the aperture of the shell during the time of hibernation, or æstivation.