Canadian Oil Sands Trust, Calgary, (Toronto: COS.UN) has increased its bid for Canada Southern Petroleum Ltd., Calgary, (Toronto: CSW; Nasdaq: CSPLF) to US$11.10 per share for a total deal value of approximately US$161 million. The new bid tops the most recent bid from Petro-Canada, Calgary, (NYSE: PCZ; Toronto: PCA) for US$11 per share. Canadian Oil Sands is offering the deal through its subsidiaries Canadian Oil Sands Ltd. and 1212707 Alberta Ltd. The board of Canada Southern recommended its shareholders accept the most recent bid from Canadian Oil Sands.