L. M. W., a girl of 12 years, was brought to my office by Dr. T. S. Greer of Edgerton, Kan., Feb. 15, 1899. As the Doctor presented the child with her father, he said that he thought he had a very singular case. Looking at the child's eyes, I remarked to him: "You have succeeded, Doctor, in dilating the pupil ad maximum," to which he replied, "No, I have never used any mydriatic in this case, nor has the girl taken any medicine that would induce mydriasis." Upon a closer examination I discovered that instead of the pupils being dilated, there was an absence of all the iris excepting a narrow rim at the ciliary border, about 1.5 mm. wide (Figs. 1 and 2), and this was ragged or serrated, having no circular fibers. There was a slight scallop at the zenith of both irides. (Fig. 2). By either