The data presented in this report were obtained during July, August, and September, 1951 on Cruise STIRNI I of the project. The location of the stations at which the data were obtained is shown. In preparing the surface salinity contours the following procedure was followed Salinity values obtained by titration of surface samples secured at all hydrographic stations and at many bathythermograph lowerings between station positions were plotted on USC and GS Chart No. 1108. The points thus located were then connected by the STIRNIs track from station to station. On the course lines the corrected surface salinity values from the Salinity-Temperature-Depth Recorder were plotted and the whole was contoured.