768 GEOGRAPHICAL DISTRIBUTION OF ANIMALS. 



Solomon Islands, a region intermediate between Oriental, 

 Australian, and Polynesian. It seems also convenient to 

 recognise two polar regions, — Arctic and Antarctic. Of 

 the last, we have had as yet only glimpses. 



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



(Arctic.) 

 Nearctic. Pal.sarctic. 



Holarctic. | 

 Transition Transition 



to to — Oriental. 



I 



Transition to Polynesian 

 and to 

 Polynesian — Neotropical. Ethiopian. Australian. 



(Antarctic.) 



Many authorities use the following arrangement : — 



Notog.ba 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.sa or Northern World. 



III. Periarctic or Holarctic Region, including two sub-regions, — 

 Paltearctic (Eurasian and Mediterranean) and Nearche (Cana- 

 dian and Sonoran). 



IV. Palaeotropical Region, including two sub - regions, — African 

 (Ethiopian and Malagasy) and Oriental (Indian and Malayan). 



