Mounts in Canada Balsam will keep if kept in a cool place. Pore plate em. photographs H-cell in pore plates. Microvilli around pore plates. Nerve cell - has distinctive mitochondria & peculiar incomplete tubules. This cell looks has different aspects- it can be black or lighter colored depending on the stage of development. Nerves Striated muscle in parietal diaphragm muscle, Haemalum stained Membranipora membranacea: there are 2 small glands between the opercular & diaphragm muscles in M.m. Spherical leukocytes lining the opercular lining; there is a doubling over of the lining. Muscles - those attached to frontal wall and lateral wall & go to funiculus infer epithelial attached to cuticle