the journal of experimental zoology fig 4 camera lucida drawing of the path of a planarian showing the rela tion between changes in the direction of illumination and the direction of locomo tion c e path of specimen r point at which wandering reflex took placearrows 1 to 6 indicate successive directions of rays of light dotted lines extend ing from the arrows 2 to 6 indicate the position of the planarian on its path whenthe direction of the rays was changed 74 w h taliaferro that the planaria practically always turned directly from thelight without trial movements 1 extraneous 2cenjjd.jpg from emıtion View Photo