Note 114 — Chapter VIII · THE MAMMALIA OR MILK-GIVERS. The Simplest Suckling Mother, the Active Pouch-bearers, and the Imperfect-Toothed Animals.
Reading edition
The only exceptions to this are a tooth and a piece of a tusk of one of the ancient elephants, lately found in Australia, showing that a few straggling forms of mammalia probably reached that country in Tertiary times.