300 • MAMMALS. 



17. Cordilleras of the Andes, from 5500 to 9000 feet above the soa. 



18. Andian region, above 9600 feet of elevation. 



19. West Indian region. 



20. Brazilian district. 



21. La Plata, and Northern Patagonia. 



22. Antarctic region. South Patagonia, Tierra del Fuego, Falldand Isles, &c. 



23. South Africa. 



24. Temperate Australia and Van Dieman's Land. 



25. New Zealand. 



Meyen, on the other hand, divides his regions by zones. He takes the throe recognised zones, — 

 the torrid, the temperate, and the frigid — and subdivides each hemisphere into eight smaller 

 zones, viz., — 



1.. Equatorial. 



2. Tropical. 



3. Subtropical. 



4. Warmer temperate. 



5. Colder temperate. 



6. Sub-arctic. 



7. Arctic. 



8. Polar. 



As this is based entirely upon a principle (temperature) which I only admit as an accessory 

 in the distribution of species, I may dismiss ileyen's zones without going into any details as 

 to their limits, and without considering his vertical zones, the details of which, although very 

 interesting in themselves, have not much bearing upon the limits of the Regional distribution 

 of Mammals. 



DecandoUe, in his acbnirable work on "Geographic Botany," does not actually give us his 

 own views regarding botanical regions. He treats of the regions of species, of genera, and of 

 families ; but from his enumeration of the following " grandcs regions," in relation to families, 

 we may infur that he looks upon them as special ; they are, — • 



1. Temperate North America. 



2. Temperate regions of the Old-world. 



3. Intertropical America. 



4. Intertropical Africa. 



5. Intertropical Asia. 



6. New Holland. 



7. The Cape, or extra-tropical South Africa. 



8. Cliili, Buenos Ayres, South Brazil. 



Elsewhere he adds from other regions to these, viz. 1, tlie Arctic Regions; 2, Intertropical 

 Polynesia, New Zealand, Norfolk, Brougham, Auckland, and Campbell ; 3, Kerguelen Isles, Am- 

 sterdam, St. Paul, Prince Edward, Tristran d'Acunha ; 4, Patagonia and Falkland Islands.* 



* Decandolle, "Geographic liotaiiinuo raisomii-c," 1855, p. 1255. 



