THE GAZELLE. 
43 
species 
*'6ceiv, 
appear not only never to mix, but to 
Hot ^ ^modifications from climate. It is 
those which are farthest separated by geo- 
^aphicai position that differ most ; the dissi- 
pty being greatest between the several 
^pocies of the same country, as in the vast 
1 me Stllllt; CULllltlJ, us 111 tllc vciOt 
s of antelopes in Southern Africa. Hence 
^ Hiay infer that those specific differences 
rat ^ave resulted from varieties of tempe- 
^ conclusion which is strengthened by 
the of Pallas, according to which 
g. species which are most similar bear the 
jg antipathy towards each other. It 
^ ®fdl more remarkable that even in the same 
I’iabl ^ abodes of each species are inva- 
So L ’ for we are assured that in 
th^^ Africa the antelopes which inhabit 
th never enter the forests, and that 
Plai^^ forests never frequent either the 
its l/ marshes ; each species confining 
® to a peculiar site. 
