A German scientific expedition to Antarctica says two islands marked on maps since 1961 do not exist and were probably mistaken for huge icebergs, New Zealand Press Association reported Wednesday. The agency said the expedition had gone to the North Victoria area of Antarctica to collect rock samples from two small islands called the Terra Novas. Despite extensive aerial searches by helicopter and an approach by the expedition's ship, the islands could not be located, the report said. NZPA said the expedition recommended the islands be removed from official topographical maps.