MARSUPIALS AND MONOTONES are two orders of mammals that differ from other mammalians groups in the ways that their young develop .The order Marsupial, the pouch mammals , is made up of Krangaroos and their relatives..Typically, Marsupial give birth to their young as a very early stage of development .The young then crawls to the mother's pouch (which is on the outside of her abdomen),where it attach it self to a nipple and remains until fully developed.Most Marsupials lived in Australia,,Although the opossum - which are classified as marsupials despite not having a pouch- live in Americas. The order Monotremata is made up of Platypus and its relatives( the echidnas or spiny anteaters).The monotremes are primitive mammals that lays eggs. which the mother incubates.The monotremes are found only in Australia and New Guinea.