os NATURAL HISTORY. 
this respect is very marked, the cat being much attached 
to place, and little, if any, to persons. 
81. The differences between some of the varieties of 
dogs are greater than those existing between different 
species of some animals. The Greyhound and the Bull- 
dog, for example, are more unlike than the Lion and the 
Tiger, two species of the cat tribe, and vastly more than 
the Tiger and the Leopard. But the characteristics of 
these species remain fixed age after age, because the in- 
fluence of domestication is not brought to bear upon 
them. Even the markings on the skins of such wild an- 
imals remain unchanged from generation to generation. 
Stripes and patches are therefore, in some of them, made 
the basis of distinguishing different species, while in the 
domesticated animals nothing is more common than 
changes of color. 
82. The differences between the varieties of man are 
no greater than those between the varieties of the dog, 
the companion of man. And if domestication can pro- 
duce these varieties in the one case, they surely can in 
the other, where it has a still greater influence. The 
doubts, then, existing in the minds of some in regard to 
the single origin of the human race are unfounded, and 
the account given in the Bible is proved true by an ob- 
servation of facts. 
83. Although the Wolf, Fig. 34 (p. 53), belongs to the 
dog family, dogs seem to be its natural enemies. While 
the smaller flee from it in terror, the stronger pursue 
and killit. And yet it is thought by some that the orig- 
inal dog was a Wolf; and it is asserted that, though this 
animal is so fierce, it can be tamed when young, and is 
then as susceptible of attachment to man as the dog is. 
Wolves commonly hunt in packs or bands, and are very 
crafty in their modes of taking their prey. Like other 
wild beasts, they are exterminated as man cuts down the 
forests and builds his habitations. In the early settle- 
ment of this country they abounded even in the states on 
