By this time the familial occurrence of multiple benign cystic epithelioma is a matter of general knowledge. As to the literature, the papers by Summerill and Hutton, by Sutton, by Beck, by Savatard and by Ricker and Schwalb supply sufficient details on the subject. A full bibliography appears in the articles by Summerill and Hutton and by Beck. The most extreme example was that of Sutton, who reported seventy-four cases in three generations. Of these, only one case was verified by biopsy; five were diagnosed by direct clinical examination and the remainder on hearsay. My own experience was made the more valuable because in seven of the ten cases a biopsy was secured—not only one specimen, but in one case three specimens and in three others two specimens. In short, twelve lesions taken from seven patients were studied. Thus it was possible to study, from one patient, a lesion from