A - True Marsupials, lowly developed. - True Marsupials, highly developed. - 2 branches - Branch I, Placentals, from which branch off Rodents, Insectivora, a branch terminating in Ruminants and Pachyderms, Canidae and terminates in Quadrumana. - Branch II, Present Marsupials, splitting into two branches terminating in Kangaroo family (with 2 unnamed branches) and Didelphys family.英文原著 · 《The Life and Letters-2》
'Possum: In Australia, a class of marsupials that were originally
mistaken for possums. They are not especially related to the possums
of North and South America, other than both being marsupials.英文原著 · 《Joe Wilson and His Mates》
'Possum/Possum: In Australia, a class of marsupials that were
originally mistaken for the American animal of the same name. They are not especially related to the possums of North and South America,
other than being marsupials.英文原著 · 《On the Track》
Placental animals, e.g. might be at each period less variable than Marsupials, and nevertheless have undergone more DIFFERENTIATION and development than marsupials, owing to some advantage, probably brain development.英文原著 · 《The Life and Letters-2》
"In the class of mammals the steps are not difficult to conceive which led from the ancient Monotremata to the ancient Marsupials; and from these to the early progenitors of the placental mammals. We may thus ascend to the Lemuridae; and the interval is not very wide from these to the Simiadae. The Simiadae then branched off into two great stems, the New World and Old World monkeys; and from the latter, at a remote period, Man, the wonder and glory of the Universe, proceeded." ("Descent of Man" (Popular Edition), page 255.)英文原著 · 《Darwin and Modern Science》
I, myself, am the latest marsupial. Also, I might boast that I have the largest pocket of them all. But there is nothing in that.]--one, the " Tasmanian devil;" that is, I think he was one of them. And there was a fish with lungs. When the water dries up it can live in the mud. Most curious of all was a parrot that kills sheep. On one great sheep-run this bird killed a thousand sheep in a whole year. He doesn't want the whole sheep, but only the kidney-fat.英文原著 · 《Following the Equator》