@amur leopard - which skeleton are you meaning? The only one at "bottom right" is the Koala. If you mean bottom-left then it is an American Opossum (a Virginia Opossum would seem most likely).
@Chlidonias Oh no. I have to return to pre-school
Sorry for the confusion, I only just realised the mistake - sorry @pangolin12 my fault entirely
When I thought of marsupials I just automatically thought of Australasia. Thanks for the info though, much appreciated.