" No animal, excepting man, inhabits every part of the surface of 

 the earth. Each great geographical or climatal region is occupied 

 by some species not found elsewhere ; and each animal dwells 

 within certain limits, beyond which it does not range while left to 

 its natural freedom, and within which it always inclines to return, 

 when removed by accident or design. Man alone is a cosmopolite. 

 His domain is the whole earth. For him, and with a view to him, 

 it was created. His right to it is based upon his organization and 

 his relation to Nature, and is maintained by his intelligence and the 

 perfectibility of his social condition. 



"A group of animals which inhabits any particular region, em- 

 bracing all the species, both aquatic and terrestrial, is called its 

 Fauna ; in the same manner as the plants of a country are called 

 its Flora. 



" There is an evident relation between the fauna of any locality 

 and its temperature, although, as we shall hereafter see, similar 

 climates are not always inhabited by similar animals. Hence, the 

 faunas of the two hemispheres have been distributed into three 

 principal divisions, namely, the arctic, the temperate, and the tropi- 

 cal faunas ; in the same manner as we have arctic, temperate, and 

 tropical floras. Hence, also, animals dwelling at high elevations 

 upon mountains, where the temperature is much reduced, resemble 

 the animals of colder latitudes rather than those of the surrounding 

 plains." 



AGASSIZ and GOULD. 



286 



