“…The names of these two-layered epithelial cells have been proposed in several different ways, for instance "luminal" cell (ZELICKSON, 1961;KUROSUMI, 1977), "surface" cell (MUNGER, 1961;SHIBASAKI and ITo, 1967), "superficial" cell (HIBBS, 1958;ELLIS, 1967, 1968) and "inner" cell (HASHIM0T0 et al, 1966 for the centrally situated cell, while the "peripheral" cell (ZELICKS0N,1961;ELLIS, 1967;KURO-SUMI, 1977), "basal" cell (HIBBS, 1958;MUNGER, 1961;ELLIS, 1968;ITo, 1967) and"outer" cell (HASHIM0T0 et al, 1966) have been used for the peripherally situated cell.…”