PROF. MORIZ KAPOSI, one of the leading dermatologists of the nineteenth century, was born at Kaspová r, Hungary, on October 27, 1837. He studied medicine at Vienna, where he qualified in 1861, and then became assistant to the celebrated Prof. Hebra, whom he succeeded later in the chair of dermatology in the medical faculty of the University of Vienna. He was the first to describe several new skin diseases, such as multiple pigmented sarcoma of the skin (1872), xeroderma pigmentosum (1876), to which he has given his name, and lichen ruber moniliformis (1886). In addition to collaborating with Hebra in his work on diseases of the skin, which was translated into English in the New Sydenham's Society's publications (1866-80), he brought out an independent work on skin diseases which was translated into English and French, and a handbook on syphilis, as well as numerous articles in the Archiv fur Dermatologie und Syphilis and the Wiener medizinische Wochenschrift. His lectures, which attracted numerous specialists from both his own and foreign countries, were remarkable for their clearness and precision, and many of his pupils afterwards occupied chairs of dermatology in different countries. Throughout his life he upheld Hebra's teaching, including the erroneous doctrine of the identity of chicken-pox and small-pox, and of measles and German measles. He died on March 16, 1902, a few days after the celebration of the twenty-fifth anniversary of his appointment as professor.