1 0 0 0 OA チオ尿素によるプラナリア眼の色素消失
The pigment granules in the eyes of Planaria disappeared as a result of thiourea treatment, but the skin pigment was not affected. In the eye-spot of the regenerating head, a little amount of pigment granules was formed, but later the eye-spots became gradually decolorized. Daily renewal of thiourea solution was less effective in inducing depigmentation of the eyes than keeping animals in the same solution throughout the experiment.