Note: Several related species are found in South America. The water opossum of Brazil ({Chironectes variegatus}), which has the hind feet, webbed, is provided with a marsupial pouch and with cheek pouches. It is called also {yapock}. {Opossum mouse}. (Zo["o]l.) See {Flying mouse}, under {Flying}. {Opossum shrimp} (Zo["o]l.), any schizopod crustacean of the genus {Mysis} and allied genera. See {Schizopoda}.