INTRODUCTION. METHOD OF CALCULATION OF PERCENTAGES. DEATH CERTIFICATES TAKEN FOR EXAMINATION. RESULTS: (1) Cancer of the Skin. (a) Occupational Distribution of Total Mortality. (b) Occupational Distribution according to Anatomical Site. (2) Cancer of the Lip. DISCUSSION: Cancer of the Skin. Cancer of the Lip. Comparison of Cancer of the Skin and of the Lip. SUMMARY. THE data given below are derived from an examination of the death certificates of cases of cancer of the skin, lip, penis and scrotum in males from England and Wales for the 34 years 1911 to 1944 inclusive. In the publications of the General Register Office during the period in question (1911 to 1944) cancers of the penis and scrotum were included under the heading "Skin" during 1911 to 1916, and were recorded separately, but under a common heading, "Penis and Scrotum," during 1917 to 1922. In 1923 and subsequently the three forms were recorded under separate headings. For the purposes of this paper, the approximate numbers of deaths from cancer of the penis and scrotum during 1911 to 1916 were ascertained by interpolation from the data for 1917 to 1920. The whole number of certificates examined individually was over 22,000. This study was carried out on the general lines followed in the examination of death certificates of cases of cancer of the lung and larynx (Kennaway and Kennaway,, 1936; 1947). The data illustrate the social differences in mortality from cancer of an exposed site which was studied by Stevenson (1923), and subsequently by Conrad and Bradford-Hill (1939).