SMALL MAMMALS COLLECTED IN CANADA. 299 



to dig out burrowing animals in winter, as the frost penetrates 

 about four feet. 



The gins used by the fur-trappers are, for the collector, 

 much superior to those sold in England, as in the first place 

 they have no teeth, and consequently do not tear the skin ; and, 

 secondly, the under part of the spring is put on with a ring round 

 the jaws, like the upper part, so the trap can be bent either way 

 to fit an angle in the hole or run. 



A2 



