BOOTHIA, a peninsula of northern Canada, belonging to Franklin district, and lying between 69°30' and 72° N. and 92° and 97° W. Area, i3,000sq.m. It forms the western side of the Gulf of Boothia, which separates it from Baffin Land, and takes its name from Sir Felix Booth, who fitted out the expedition of 1829-33, led by Captain (afterwards Sir James) Ross, which discovered the peninsula. Cape Murchison is the most northerly point of the American mainland. The north magnetic pole was first distinctly localized in the peninsula (70°5' N., 96°47' W.), by Ross. (See also ARCTIC REGIONS.)