In an investigation of a series of sixty-six cases of tumors of salivary glands reported by Schreiner and Mattick in 1928, 1 in which they record the results of operation and radiation therapy, we find twenty-nine mixed tumors of salivary glands. Histological diagnosis had been made on these cases in the pathological laboratory of the New York State Institute for the Study of Malignant Disease. It was thought that a further review of these cases from the histological standpoint might possibly reveal characteristics in the structure of these tumors which might be of value in the prognosis in a given case. Of the twenty-nine cases, nine were found in males and twenty in females. Though the age incidence of these tumors is usually said to be low, we found none in the first two decades, five in the third, four in the fourth, eight in the fifth, five in the sixth, four in the seventh, and three above the age of seventy. While it must be admitted that this type of tumor notoriously runs a long course, and that some of the cases presenting themselves for treatment gave a history dating back some years, the age incidence of the tumors in this series seems to correspond with that of other malignant growths. While more of these tumors were found in the parotid area than elsewhere, a greater number were variously distributed in the lower portion of the face and anterior portion of the neck. The site of the original tumors is shown on the following page.