DR. GRIFFITH EVANS, whose death on December 7 we regret to announce, was a pioneer in the study of protozoology in connexion with infections, and the first man to associate trypanosomes with the production of disease. He was born at Tymawr, near Towyn, Merionethshire, on August 7, 1835. After studying medicine for a short time with a medical practitioner at Towyn and Aberdovey, he entered the Royal Veterinary College, London, where he qualified as M.R.C.V.S., and later passed into the Royal Artillery, with which regiment he served in Canada during the American Civil War. During his years of service in Montreal he registered in the Medical Faculty of McGill University, and graduated M.D., C.M. in 1864.