A high resolution tangential section through the buccal cavity showing the close spacing of the cilia in the undulating membrane and 3, presumably nonciliated basal bodies, in the inside row. Accessory microtubular ribbons arise from the basal bodies of the inner row and extend upward toward the oral ribs. Microtubular ribbons in the oral ribs are sectioned obliquely and alveolar segments lie between the ribbons. Portions of two membranelles are seen in the buccal cavity. TEM taken on 8/15/67 by R. Allen with Philips 200 operating at 60kV. Neg. 12,400X. The raw film was scanned with an Epson Perfection V750 Pro. This image is best used for quantitative analysis.