- The Tasmanian Wolf, or Thylacine (Thylacinus cynocephalus).
2) approximating to those of the thylacine, though markedly different in details.
Very generally the tail has distinctly the appearance of an appendage, but in some of the lower mammals, such as the thylacine among marsupials, and the aard-vark or ant-bear among the edentates, it is much thickened at the root, and passes insensibly into the body, after the fashion common among reptiles.
That it was not much earlier is shown by the fact that some still living species of mammals, such as the thylacine, existed before"the separation.
In others, as the thylacine, it is rudimentary, being shed or absorbed before any of the other teeth have cut the gum, and therefore functionless.