THE OTTER 



295 



tricks, but in growing old become unruly and often dan- 

 gerous pets. 

 The bears are succeeded by the Mustelidce, or the otter, 



skunk, badger, wolverene, weasel, mink, ermine, etc., all 

 of which are -valuable for their furs. 



The otter {Lutra Canadensis) is thoroughly amphibious. 

 It can remain under water almost as long as a loon, au4 



