USS Periwinkle (1864)
 USS Periwinkle (1864) was a steamer procured by the Union Navy during the final months of the American Civil War. She served the Union Navy’s struggle against the Confederate States of America as a patrol gunship. After the war this ship was retained by the U.S. Navy to support the Hall Scientific Expedition to the Arctic Ocean and during this voyage – under her new name Polaris – she proceeded into Arctic waters only to have her hull crushed by the ice.