OTHER WILD DOGS, 15 
is of course much intermixed with foreign breeds. The North 
American dogs are very closely allied to the dingo in all respects, 
but are generally smaller in size, and are also much crossed with 
European breeds. In some districts they burrow in the ground, 
but the march of civilisation is yearly diminishing their numbers 
throughout the continent of America. 
VI.—OTHER WILD DOGS. 
Many other varieties of the wild dog are described by travellers, 
but they al] resemble one or other of the above kinds, and are of 
little interest to the general reader. 
