8o6 GEOGRAPHICAL DISTRIBUTION OF ANIMALS. 



arctic and Neotropical, and (3) the Austro-Malaysian Islands 

 lying to the east of Bali and Borneo, inclusive of the 

 Solomon Islands, a region intermediate between Oriental, 

 Australian, and Polynesian. It seems also convenient to 

 recognise two Polar regions, Arctic and Antarctic. 



It may be useful to map out the divisions as follows : 



ARCTIC 



NEARCTIC. PAL^ARCTIC. 



| Holarctic. | 



Transition Transition 



to to ORIENTAL. 



I 



Transition to Polynesian 



and to 

 Polynesian NEOTROPICAL. ETHIOPIAN. AUSTRALIAN. 



ANTARCTIC 



Many authorities use the following arrangement : 

 OR SOUTHERN WORLD 



I. Australian Region, including three sub-regions, New Zealand, 



Australian, and Papuasian or Austro-Malayan. 



II. Neotropical Region, including two sub-regions, South American 

 and Antillean or West Indian. 



ARCTOG/EA OR NORTHERN WORLD 



in. Periarctic or Holarctic Region, including two sub-regions, 



Palgearctic (Eurasian and Mediterranean) and Nearctic 



(Canadian and Sbnoran). 

 IV. Palseotropical Region, including two sub -regions, African 



(Ethiopian and Malagasy) and Oriental (Indian and 



Malayan). 



