The Genera Thylacinus, Diabolus, and Dromicia, are peculiar to Van Diemen's Land.

The species of the genera Dasyurus and Perameles are very abundant in Van Diemen's Land, but they have alsorepresentatives which are found in New Holland.

The species of the genera Nyctophilus, Phalangista, Hepoona, Phascogale, Macropus, Halmaturus, Hypsiprymnus, and Hydromys, appear to be common to all parts of the continent, and also to Van Diemen's Land.

The genera Echidna and Ornithorhynchus are found in New Holland and Van Diemen's Land, but I have not heard of their having been discovered in the Western or Southern parts of the continent of Australia.

There are some of the genera of the non-Marsupial animals, as Rhinolophus and Pteropus, which are common to various parts of Australia and the different parts of the Old World, and others, as Canis, Mus, Scotophilus, and Molossus, which are common to it and to both Hemispheres. Two Marsupial genera, Halmaturus and Perameles, have species found in New Guinea, but most probably, when they have been more carefully examined, they will be found to form a peculiar genus, allied to the Australian animals, as is the case with the tree kangaroos (Dendrolegus) and the Phalangers (Cuscus) of that country. We have a specimen of the Halmaturus in the British Museum, from the Leyden collection, but like many of the specimens in that collection, where the zoological specimens are made subservient to the anatomical predilections of the conservator, it has no skull, and false claws, which renders it impossible for me to define its characters. The tail has rings of scales under the hair, but this is also the case with most Halmaturi.

Before proceeding to the consideration of the distribution of the species, over the different districts of Australasia, it may be remarked that this is a subject surrounded with

considerable difficulty, as different naturalists do not always apply the same test to determine the distinction of the species, some considering the differences found in the specimens from different localities, as merely local varieties, and others regarding them as distinct; and others again declaring that several specimens, which cabinet naturalists are in the habit of regarding as only accidental varieties from the examination of the skins, are quite distinct when they are observed alive in their native habitat. In the preceding list, when all the specimens I have seen from a particular habitat have a similar and peculiar character, I have considered them as species; on the contrary, when the specimens from the same locality offer variations among themselves, as in those of the genus Hepoona, where the extent of the whiteness on the tail, and the variation in the colour of the body appear to differ in the specimens from the same place, I have regarded them as belonging to the same species, believing it to be a variable species which has an extensive range.

From the Table already given it appears, that of the species found on the Australian Continent, 71 are confined to it, 12 common to it and Van Diemen's Land, and one common to it and Norfolk Island; while of the 24 species found on Van Diemen's Land, 11 are found in it alone.

The species common to the Australian Continent and Van Diemen's Land, are-2. Nyctophilus Geoffroyii -4. Scotophilus Gouldii -5. Scotophilus australis-15. Dasyurus viverrinus-27. Perameles obesula-32. Phalangista vulpina-38. Hepoona Cookii-70. Hypsiprymnus minor-81. Hydromys chrysogaster-84. Mus lutreola — 94. Platypus anatinus.

The species common to Australia and Norfolk Island, but not found in Van Diemen's Land is-44. Petaurus sciureus.

The eleven species peculiar to Van Diemen's Land, are-11. Thylacinus cynocephalus-12. Diabolus ursinus -13. Dasyurus maculatus-17. Phascogale minima—18. Phascogale affinis-37. Dromicia nana--34. Phalangista fuliginosa-58. Halmaturus Billardieri-80. Phascolomys ursina-93. Echidna setosa-83. Mus setifer. The last species is also found in Java, from whence it might have been introduced. It has been known in Van Diemen's Land some years, and does not appear to have found its way to Australia.

Of the 72 species found in the Australian continent, six have only been recorded, as having been found on the North-west coast--52. Macropus unguifer-55. Halmaturus Bennettii-65. Halmaturus fasciatus-67. Petrogale brachyotis-71. Hypsiprymnus Lesueurii.

Peculiar to the Western Australian district are:22. Phascogale leucogaster-23. Myrmecobius fasciatus28. Perameles fuscoventer-29. Perameles obesula30. Perameles lagotis-51. Macropus lunatus-54. Halmaturus manicatus-60. Halmaturus brevicaudatus-69. Petrogale lateralis-72. Hypsiprymnus Gilbertii-72. Bettongia Ogilbii-91. Hapalotis Gouldii.

To the South Australian district:-19. Phascogale rufogaster-49. Macropus fuliginosus-63. Halmaturus Derbianus-77. Bettongia Grayii-85. Mus Greyii-86. Mus Adelaidensis.

To the North Coast:-7. Molossus australis ?

In the New South Wales district, there have been recorded the following: some of them may have a larger distribution on the Continent, when these countries become better known, and some of them (marked with a star*) are common to this district, and Van Diemen's Land.-1. Rhinolophus megaphyllus-*4. Scotophilus Gouldii-6. Scotophilus pumilus 8. Pteropus poliocephalus 9. Canis fami

liaris Australis-10. Otaria Peronii-14. Dasyurus Geoffroyii -*15. Dasyurus viverrinus-16. Phascogale penicillata -20. Phascogale flavipes - 21. Phascogale murina25. Myrmecobius? rufus-26.* Perameles fasciatus-*27. Perameles nasuta-31. Choropus ecaudatus-33. Phalangista xanthopus-35. Phalangista canina-36. Phalangista Cuvieri-39. Petaurista Taguanoïdes-40. Petaurista leucogaster-41. Petaurus macrurus-42. Petaurus flaviventer43. Petaurus breviceps-44. Petaurus sciureus-45. Petaurus Peronii--46. Acrobates pygmæus-47. Macropus major-50. Macropus frænatus-53. Halmaturus Parryii— 57. Halmaturus elegans-56. Halmaturus Ualabatus - 59. Halmaturus Eugenii-61. Halmaturus dorsalis-62. Halmaturus Parma-64.? Halmaturus Banksianus-66. Petrogale robusta -68. Petrogale penicillata *70. Hypsiprymnus minor-73. Lagorchestes Leporoïdes-74. Bettongia setosa-76. Bettongia Whitei-78. Bettongia rufescens -79. Phascolarctos fuscus-82. Pseudomys australis-87. Mus platyurus?-88. Mus Hovellii?-89. Hapalotis albipes -90. Hapalotis Mitchellii-92. Echidna aculeata-*94. Ornithorhynchus paradoxus.

Two species are remarkable, as being common to the East and South sides of the Continent, viz.-48. Macropus laniger-84. Mus lutreola-*26. P. fasciata. The latter is also found in Van Diemen's Land. And the four following species are common to the South, West, and East sides of the Continent-5. Scotophilus Australis--32. Phalangista vulpina-38. Hepoona Cookii, and varieties-81. Hydromys chrysogaster. These are all also found in Van Diemens' Land, and may therefore be considered as the most generally distributed of all the Australian animals. Both the Phalangista and the Hepoona are very variable in their colours, and may prove to comprise different species, when we are enabled to examine a larger number of specimens from different localities.

MR. GOULD, who is now engaged in a work upon the Ornithology of Australia, having been solicited to furnish a list of the Birds of the Western coast, has kindly forwarded the following enumeration of the species which have come under his notice as inhabiting that part of the country. The list, although necessarily incomplete, is the most perfect that has yet been published, and will doubtless be of considerable interest to the scientific as well as the general reader.

ORDER RAPTORES.

Aquila fucosa, Cuv.

Buteo melanosternon, Gould.
Haliæëtus canorus, Vig. & Horsf.

Pandion leucocephalus, Gould.
Falco hypoleucos, Gould.

melanogenys, Gould.

frontatus, Gould.

Ieracidea Berigora, Gould.

Astur approximans, Vig. & Horsf.

Accipiter torquatus, Vig. & Horsf.
Milvus isurus, Gould.

Elanus axillaris.

Circus affinis? Jard. & Selb.

Nyctale? Boobook, Gould.

Strix Cyclops, Gould.

delicatulus, Gould.