Fig. 1. The structure of Eimer's organ in the coast mole Scapanus orarius, viewed from the side (A) and from above (B). A central column of epithelial cells is associated with mechanoreceptive intraepidermal free nerve endings arranged in a ring (C-FNE and S-FNE). A second set of smaller nociceptive free nerve endings surrounds the central column (PER-FNE). Merkel cell–neurite complexes are arrayed at the base of the Eimer's organ (MC) and one to two lamellated corpuscles (LC) are found below the Merkel cell-neurite complexes. SC, stratum corneum. Scale bars, 20 µm. (Adapted from Marasco et al., 2006.)