Didelphis virginiana, Pennant. Virginian Opossum. Female & Young Male, 7 Months Old, 1845, John James Audubon. The virginia opossum is the only marsupial native to North America.
via Amon Carter Museum
Dide[l]phis derbiana (now Caluromys derbianus) - Derby’s Opossum
This Paraguayan and Central American opossum was named in honor of the 13th Earl of Derby.
This particular specimen lived in the Zoological Society’s Gardens, and would viciously attack anyone who came near her when she had young who were not yet on their own. When she was not with her young, she was shy, but not eager to attack.
Biologia centrali-americana: Mammalia. Edward Richard Alston, 1882.