Wallace Line to the west of the Philippines. Wallace's studies in Indonesia demonstrated the emerging theory of evolution, at about the same time as Joseph Dalton Hooker and Asa Gray published essays also supporting Darwin's hypothesis. Understanding of the biogeography of the region centers on the relationship of ancient sea levels to the continental shelves. Wallace's Line is visible geographically when the continental shelf contours are examined; it can be seen as a deep-water channel that marks the southeastern edge of the Sunda Shelf which links Borneo, Bali, Java, and Sumatra underwater to the mainland of southeastern Asia. Australia is likewise connected
Thornton Line its amendment the Coxe–Barclay Line (1688) which was disowned by the East Jersey proprietors in 1695. While it appears on Worlidge's map of the two Jersey colonies, it was never formally adopted. Thornton Line The Thornton Line is a boundary line or partition line surveyed in 1696 through the Province of New Jersey during the colonial period, separating the territory into two proprietary colonies: the Province of East Jersey and the Province of West Jersey. New Jersey was divided into two proprietary colonies after the Duke of York's 1664 grant of the colony to Sir George Carteret and John Berkeley,