Brown Four-eyed Opossum Metachirus nudicaudatus (E. Geoffroy, 1803)
Zoological Society of London Report of the Council and Auditors for 1956, p32: It is probable that these were already in the mother's pouch on arrival.
This species is also known as the Rat-tailed Opossum.
Grey Short-tailed Opossum Monodelphis domestica (Wagner, 1842)
Zoological Society of London Annual Report 1986-1987, p26.