First paper in English giving a detailed account of the development of S. japonicum in the snail and its subsequent development in man. Atkinson, a surgeon in the Royal Navy, was a member of Scott’s Antarctic expedition. He was in command of the expedition's base at Cape Evans for much of 1912, and led the party which found the tent containing the bodies of Scott, "Birdie" Bowers and Edward Wilson. Atkinson was subsequently associated with two controversies: that relating to Scott's orders concerning the use of dogs, and that relating to the possible incidence of scurvy in the polar party.