Localised Arterial Thrombosis of Indeterminate Origin

to that labelled by Leriche and Strieker (1933) " spontaneous localised monoarteritis of indeterminate origin." It has been possible to carry out studies of the vasomotor reactions in all 4 cases, and in 2 to make a detailed histological examination of the affected artery. Case i.?Able-seaman J. A. R., aged 25, admitted 21st September 1942. In May 1941 the ship in which he was serving was sunk in the South Atlantic, and he clung to a spar for four to five hours before being rescued. About twelve hours after rescue he became aware of severe pain in the region of the right wrist and palm, which became swollen. Some time later, after his wrist and palm had become almost normal again, the ship in which he was confined was sunk, and he was immersed