George Windsor Earl the Physical Geography of South-Eastern Asia and Australia", published in 1845, described how shallow seas connected islands on the west (Sumatra, Java, etc.) with the Asian continent and with similar wildlife, and islands on the east such as New Guinea were connected to Australia and were characterised by the presence of marsupials. This formed the insipiration for Alfred Russel Wallace to propose the faunal boundary line now known as the Wallace Line. He published a paper in 1850 that invented the term 'Indu-nesians', for a quaint racial classification, derived from the Latin for India and island. He published a seminal
Transpeninsular Line halfway between Delmar and Mardela Springs, Maryland. This marker is also the southern endpoint of the Mason–Dixon Line. Transpeninsular Line The Transpeninsular Line (at approximately 38°27′ N) is a surveyed line, the eastern half of which forms the north–south border between Delaware and Maryland. The border turns roughly north from the midpoint of the line towards the Twelve-Mile Circle, which forms much of the remainder of the Delaware land border. In 1751, a line was surveyed straight across the Delmarva Peninsula beginning at what at least some early Swedish settlers called "Cape Hinlopen", which was to be the southern boundary