 As an example of totum pro parte, the term Western Hemisphere is widely used by some, such as the United States government, to refer to the Americas.The Western Hemisphere consists of the Americas, the western portions of Europe and Africa, the extreme eastern tip of Siberia (Russia), numerous territories in Oceania, and a portion of Antarctica, while excluding some of the Aleutian Islands to the southwest of the Alaskan mainland.The center of the Western Hemisphere is located in the Pacific Ocean at the intersection of the 90th meridian west and the Equator, among the Galápagos Islands.