Thin wall of cirripeds normal to longitudinal septum and parallel to basis, dividing parietal tubes into series of cells [Moore and McCormick, 1969].
(Subclass Cirripedia):
Thin wall normal to longitudinal septum and parallel to basis, dividing longitudinal tubes into series of cells [McLaughlin, 1980].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.