The Plasma-membrane of the Porphyra conchocelis cells are found to be rail-likeand three layered structure of plasma-membrane. An invagination is found on theplasma-membrane of the swollen cell. The nutrients can be engulfed by the invagination of plasma-membrane from ano-ther swollen cell through small hole. Granular substance is found to be surrounded by the plasma-membrane invagina-tion formming a phagocytic vacuoles finally.