Movement of the So-Called Hairs in the Ampullar Organs of Fish Ears

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Abstract
Sensory hairs of the ampullar organs of Ameiurus nebulosus in some cases move actively. Some cristae were seen in which no movement was observed. When movement was seen the number of hairs moving in any one crista varied from one to many. Present evidence does not indicate that there is more than one type of hair cell. In some cases the movement of the hairs was a lashing with whip-like strokes; in others the hairs moved without curving; in still others there was wave-like movement involving the entire length of the hair. Some hairs were seen beating in unison. There were no definite periods of movement and of rest. The rate of movement of the hair cells was not the same for all of the hairs which were seen moving.

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