ANIMAL DISTRIBUTION 



473 



general boundaries of these areas are given below. The boundaries 

 of the regions do not necessarily follow the outlines of continents as 

 will be seen in Fig. 193. 



1. The Palaearctic Region includes all of Europe, Africa north of 

 the Sahara, and all of Asia north of the Himalaya Mountains. 



2. The Nearctic Region embraces the North American continent 

 as far south as Mexico. 



3. The Ethiopian Region consists of Africa south of the Sahara, 

 southern Arabia, and Madagascar. 



Fig-. 204. — Map showing the life regions of the earth. 



A. J. Nystrom Company.) 



(Base by permission of 



4. The Oriental Region includes Asia south of the Himalayas, and 

 that portion of the Malayan Archipelago which lies northwest of 

 Wallace's line. This famous line dividing the Oriental and Aus- 

 tralian Regions passes east of the Philippines between the islands of 

 Bali and Lombok, and between Borneo and Celebes. Bali and Lom- 

 bok are separated by a very narrow but deep strait, and there is a 

 very remarkable contrast between the faunas of the two islands. 



5. The Australian Region is made up of Australia and the neigh- 

 boring islands as far west as Wallace's line. It includes the great 

 number of small islands east of Australia. 



