The accompanying illustration represents what is believed to be a hitherto undescribed abnormality of the scalp. The condition was discovered accidentally. I observed an attendant cutting a lad's hair, and remarked that he was not doing it very well, as there appeared to be numerous scissor-marks. It was explained that the marks were due to the arrangement of the hair. This led to careful examination of the whole scalp. Its condition is very well represented in the illustration. On each side there are five deep furrows, passing from behind forwards. Those nearest the middle line are straight; the others slightly curved, and they are the more curved the further they are removed from the middle line, and at the same time they diminish in length. When the hair is of ordinary length the condition of the scalp would not be suspected; it is only when the hair is very short that the furrows become evident. For the purpose of preparing the accompanying illustration the hair was cut as short as possible, but the hair growing in the furrows was necessarily left somewhat longer than elsewhere, with the result of indicating with great clearness the course and arrangement of the depressions. The furrowing of the forehead is not abnormal, but is produced by the patient whenever he is annoyed, as he was when the photograph was taken.