A fauna of Recent Ostracoda from both shallow and deep water is described from the western Antarctic. The depth at which the samples was collected ranges from 2 m to 3925 m. The most southerly sample is from Halley Bay at 752 30" South; the most northerly in the Scotia Sea at 532 03 . A total of 69 specics were encountered belonging to 37 genera. Six of the species are des- cribed as new ( Bairdoppilata erugata. B. microguttata, Bythocythere kyamos, Rotundracythere austromarscotiensis, Callocythere multireticulatum and Poseidonamicus ansoni) and one new trachyleberid genus, Callocythere. Eleven species are left in open nomenclature.
