In view of recently reported cases of mycosis fungoides showing the histologic picture of lymphosarcoma, it seems opportune to record two additional instances, particularly since one of them has to do with the relationship between mycosis fungoides and lymphatic leukemia. Case 1.— H. L., a man, aged 42, married, a cabinet maker, was in good health until April, 1920. At that time a scaling, itchy eruption appeared on the palms, that eventually spread to the trunk and extremities. About two years later, raised, circular swellings occurred on the forehead, scalp and thighs. On July 14, 1922, the patient was admitted to the Dermatologic Clinic of the University and Bellevue Hospital Medical College. He said that he had previously visited several other institutions, and had received roentgen-ray treatment, without beneficial results. The cutaneous picture, on the day of his admission, was that of a generalized eruption which consisted of areas of