Fig. 5. The basal processes of lamprey parapinopsin-containing cells. Lamprey parapinopsin-containing cells are connected with each other via the basal processes and form a neuropile over a wide area in the whole-mount specimen of the dorsal portion (arrowheads in B). Inset in A shows dye coupling found in the UV-photoreceptor cells. B is a high magnification of the boxed region in A. Scale bars, 50 µm.