GENERAL DISTRIBUTION. __________________________________/\__________________________________ / \ NEOTROPICAL| NEARCTIC |PALÆARCTIC | ETHIOPIAN | ORIENTAL | AUSTRALIAN SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS. -----------+-----------+-----------+-----------+-----------+------------ | | | | | -- -- -- --|-- -- -- --|-- -- -- --|-- -- -- --|-- -- -- --|1. 2 -- -- | | | | | The Phalangistidæ, or phalangers, are one of the most varied and interesting groups of Marsupials, being modified in a variety of ways for an arboreal life. We have the clumsy-looking tail-less koala, or native sloth; the prehensile-tailed opossum-like phalangers; the beautiful flying oppossums, so closely resembling {252}in form the flying squirrels of North America and India, but often no larger than a mouse; the beautiful dormouse-like _Dromiciæ_, one species of which is only 2¼ inches long or less than the harvest-mouse; and the little _Tarsipes_, a true honey-sucker with an extensile tongue, and of the size of a mouse. These extreme modifications and specializations within the range of a single family, are sufficient to indicate the great antiquity of the Australian fauna; and they render it almost certain that the region it occupied was once much more extensive, so as to supply the variety of conditions and the struggle between competing forms of life, which would be required to develop so many curiously modified forms, of which we now probably see only a remnant. The Phalangistidæ not only range over all Australia and Tasmania, but over the whole of the Austro-Malayan sub-region from New Guinea to the Moluccas and Celebes. The distribution of the genera is as follows:--_Phascolarctos_ (1 sp.), the koala, East Australia; _Phalangista_ (5 sp.), East, South, and West Australia, and Tasmania; _Cuscus_ (8 sp.), woolly phalangers, New Guinea, North Australia, Timor, Moluccas and Celebes; _Petaurista_ (1 sp.) large flying phalanger, East Australia; _Belideus_ (5 sp.), flying opossums, South, East, and North Australia, New Guiana and Moluccas; _Acrobata_ (1 sp.), pigmy flying opossum, South and East Australia; _Dromicia_ (5 sp.), dormouse-phalangers, West and East Australia, and Tasmania; _Tarsipes_ (1 sp.), West Australia. _Thylacoleo_, a large extinct marsupial of doubtful affinities, seems to be somewhat intermediate between this family and the kangaroos. Professor Owen considered it to be carnivorous, and able to prey upon the huge _Diprotodon_, while Professor Flower and Mr. Gerard Krefft, believe that it was herbivorous. FAMILY 82.--PHASCOLOMYIDÆ. (1 Genus, 3 Species.)