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exclusively to that of Europe, the New Zealand fauna presents not 

 only Australian but also Polynesian and South American affinities. 

 Some of the Birds are represented by the same or closely allied 

 species in New Caledonia, while the land Molluscs and Insects, 

 the Fresh-water Lamprey (Ge<>tria), anJ the Earthworms, show 

 South American affinities. Still more remarkable is the fact 

 that a little fresh-water Fish, GaJurias attemudtis, occurs not 

 only in New Zealand and Tasmania, but in the southern extremity 

 of South America and in the Falkland Island.s. In this con- 

 nection it is interesting^ to find that there is a submerijod bank of 

 less depth than the surrounding ocean — under 2,000 fathoms — 

 passino- westwards from South America, and including many of 

 the Paeitic Islands; and an area, also of less than 2,000 fathums, 

 in the Antarctic Ocean, sendino- offshoots northwards. The first 

 of these may possibly indicate a former westward extension of 

 South America, the second a former Antarctic laud-area, perhaps 

 more or less directly connected with the existing southern conti- 

 nents. The whole cpiestion is quite unsettled and extremely 

 obscure, and is complicated by the fact that in one respect the 

 New Zealand fauna shows Ethiopian affinities. There have been 

 discovered in the Chatham Islands, a small group about 400 

 miles to the east of New Zealand, the remains of a lono--beaked 

 Rail (Biaphorajjteryx), evidently not long extinct, the nearest ally 

 of which is the Red Bird {Aplianaptcryx) of Mauritius, known to 

 have been exterminated by human agency. Moreover, the Sfreat 

 Ratite Birds, the ^pyornithida', of Madagascar, show undoubted 

 affinities with the Dinornitliidie. 



The foregoing comparison of the faunas of Great Britain and 

 New Zealand leads us to the consideration of certain fundamental 

 conceptions of zoo-geography. 



Insular Faunas. — We notice, in the first place, the striking- 

 contrast between the fauna of an island which has been recently 

 detached fi-om a great continental area, and that of an island 

 which has remained isolated for an immense and unknown period. 

 In the one case the fauna has a strictly continental character, 

 there having been insufficient time for moditication since the sepa- 

 ration took place. In the other case immigration has taken place 

 from various sources over a vast period of time, during which 

 modification has taken place to a sufficient extent to give rise to 

 new or endemic species. 



Habitat, Range, and Station. — Each kind of animal has, as 

 . a rule, its own hahitat, fresh-water in one case, the sea between 

 tide-marks in another, marsh, forest, snow-clad peaks, and so on. A 

 similar habitat may characterise whole genera and even orders. 

 Keeping always to its own habitat, the range of an animal may 

 extend over a vast area. The marsh-loving Curlew, for instance. 



