WILD ANIMALS IN CAPTIVITY 
by selection and careful breeding. (It is said that if a 
fox-terrier were stretched out similarly to pulling out a 
piece of indiarubber, all over his body, legs, head and 
all, he could be turned into a greyhound. It is well known 
that no fox-terrier is thoroughbred without greyhound 
blood in him.) I may, however, from the opportunities I 
have had of observing so many living examples of the 
above-named animals, be able to offer a few remarks upon 
the subject. 
In the first place, I find that wolves differ greatly in 
size, colour, and markings. Wolves from the Arctic 
regions are larger, lighter in colour, and have a much 
longer and thicker coat than those inhabiting milder 
climates ; and it appears to me that many of the varieties 
from different parts of the world have been considered as 
distinct species, without sufficient characters to mark 
their distinction. With regard to the jackals, they are 
more readily distinguishable, and several well-marked 
species are known and recognized. 
I now come to the dog. The origin of the extraor- 
dinary number of Ireecls of dogs, the astonishing variety of 
size, form, colour, etc., render any attempt to account for 
their origin a task of much difficulty, but, as most wild 
dogs appear to be descendants of domestic dogs which 
have become wild, it is necessary to endeavour to account 
for the origin of the domestic race. 
There can be no doubt that the Esquimaux dogs are 
reclaimed or domesticated wolves. All wolves if taken 
young and reared by man are tame, playful, and exhibit a 
friendship for those who feed and attend to them ; the 
same may be said of all the species of jackals. This being 
so, it is highly probable that both wolves and jackals 
were constantly found in the company of man, and, by this 
association, they may have become mixed. A mixed 
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