Fig. 1. Dorsal (A) and lateral (B) views of the giant shovelnose ray, Rhinobatos typus, showing the raised eyes and crescent-shaped pupil in the light-adapted state. (C) Light micrograph of the retina of R. typus showing the duplex nature of the photoreceptor layer (smaller receptors are cones). gc, ganglion cell layer; h, horizontal cell layer; ipl, inner plexiform layer; p, photoreceptor layer. Scale bars: (A) 50 mm; (B) 80 mm; and (C) 100 µm.