the scientific name of thegenus confined to Australia of Squirrel Phalangers, or Squirrel Opossums, as they have been called. See Opossum. The name was given by Sir Frederick McCoy in1867. Only two specimens have been found, and they are in theMelbourne Museum of Natural History. There is only onespecies, G. leadbeateri, M'Coy. In general form theyresemble the so-called Australian Flying Squirrel (q.v.), save for the absence of the parachute. They have largenaked ears. (Grk. gymnos, naked, and Latin, belideus, the Flying-Phalanger or Squirrel.)