132 THE GEOGRAPHY OF MAMMALS 



of India proper from the Suliman range and the lower 

 slopes of the Himalayas to Cape Comorin. A line drawn 

 northwards from Calcutta to the Himalayas, forms the 

 approximate eastern boundary between this Sub-region and 

 the next. There should also be included in this Sub-region 

 the island of Ceylon, and probably the narrow, low-lying 

 strip of desert country between the Persian Gulf and the 

 central plateau of Persia. 



2. The Burmo-Chinese Sub-region. — This Sub-region 

 includes the portion of Sikkim below 10,000 feet, Assam, 

 China south of the northern water-parting of the Yang-tze- 

 Kiang, the islands of Formosa and Hainan, and all the 

 countries of the Indo-Chinese peninsula (Cochin China, 

 Siam, and Burma), its southern land-boundary being 

 approximately a line running to the north of the Malay 

 peninsula from Tavoy on the west, to Bangkok on the east, 

 at about 15° N. lat. 



3. The Malayan Sub-region. — The Malay peninsula, 

 together with the srreat islands of the East Indian archi- 

 pelago, Sumatra, Java, Borneo, and the Philippines, forms a 

 third division, which may be called the Malayan Sub-region. 



4. The Celebesian Sub-region, containing only the 

 island of Celebes. 



This subdivision of the Oriental Region differs from 

 that adopted by Wallace in two important points : — 



(a) In the combination of Wallace's Indian and 

 Ceylonese Sub-regions into one — the Indian Sub-region. 



(6) In the transference of Celebes from the Australian 

 to the Oriental Region, and the formation of a new Sub- 

 region for its reception. 



The reasons for these changes may be here briefly 

 considered. First, as regards Ceylon, there are nineteen 



