Abstract
Single unit discharges were recorded from the dissected nerves of the loath barbel in response to mechanical stimulation. The responses were divided into two types, one was phasic response and the other was a group of after-discharge. Among the fibers producing phasic response to stimuli the thin fibers had lower threshold in comparison with the thick fibers. Under the repetitive stimula-tion the barbel nerve could follow up to 70/sec at temperature of 25°C, and discharge failed to follow at 180/sec. A loath is likely to substitute the function of its barbels partly for that of its lateral-line.
