4.Cross-section of a digital tentacle of Nautilus pompilius, light microscopy
5.Light microscopy (A, B, and E) and TEM images (C and D)of the aboral epithelium
6.Light microscopy (A, C, F, and G) and TEM images (B, D, and E) of the thick epithelium of the oral ridges
9.Epithelium of the aboral side, light microscopy images. (A) In contrast to the oral ridges,