Fig. 1. The lateral line canal system on the dorsal (D) and ventral (V) surface of the Atlantic stingray, Dasyatis sabina. Broken lines indicate sections of canal that contain innervated neuromasts, while solid lines represent neuromast-free tubules that terminate in pores. Neurophysiology recordings were made from primary afferent neurons in the anterior lateral line nerve that innervate neuromasts in the dorsal pored (Dp), ventral pored (Vp), and ventral non-pored (Vnp) hyomandibular canals (HYO). Note that the dorsal HYO contains numerous lateral tubules that branch to terminate in pores, while the ventral hyomandibular canal contains a lateral pored section and a medial non-pored section along the midline. IO, infraorbital canal; MAN, mandibular canal; PLL, posterior lateral line canal; SO, supraorbital canal. Scale bar, 1 cm. Modified from Maruska and Tricas (1998).