THE GEOGRAPHY OF MAMMALS 



(2) Land where Euther- 



ians and Marsupials 

 occur ; no Insecti- 

 vores ; many Eden- 

 tates ; no Mono- 

 tremes . . 



(3) Land where Euther-' 



ians only occur ; few 

 Edentates, no Mar- 

 supials 1 nor Mono- 

 tremes 



America south of the Isth- 1 

 mus of Tehuan tepee. ) $ 



Europe, Asia, Africa, Asia- 

 tic Islands down to Wal- 

 lace's line, and North 

 America down to the 

 Isthmus of Tehuan tepee. 



Ar dogma. 



The fault of this division is that it leaves the great 

 mass of land in the Northern Hemisphere undivided and 

 rather unmanageable. But this northern land is easily 

 separable into four sections, although it should be under- 

 stood that these four sections are not of equivalent value 

 to the two other primary divisions. Thus we obtain a 

 division of the land-area of the globe for mammals into 

 six areas, which are called Regions (see Plate I., p. 16), and 

 which may be shortly defined and named as follows : — 



< ( 



% J Australia, New Guinea, and adjacent) T . .. p . 



Q \ . i -, ttt -nil" i -!•• -iittOw (( I 'til ft .Li <U I Oil . 



h J islands up to Wallace s line j 



£ I 



j| [Central America south of the Isthmus"! 

 -! of Tehuantepec, the West Indies, and \ II. Neotropical Region. 



£ y South America 





< 



o 

 o { 



'Africa south of the Atlas, and Madagascar III. Ethiopian Region. 



South Asia, the Philippines and Islands of \ 



the Indian Archipelago down to Wal- I IV. Oriental Region. 

 lace's line, and Celebes ... J 



1 As will be shown later on, this statement is not absolutely correct as 

 regards North America, as at least one species of marsupial occurs within 

 its limits. 



