CLASS MAMMALS: ORDER CARNIVORA. 



41 



of the known species. Its long head and bushy tail, resem- 

 bling those of the Fox, 

 mark the transition '''^■'^■ 



from the Canidse to the 

 Mustelidse. The Sable 

 is arboreal, climbing 

 with ease to the highest 

 branches in pursuit of 

 birds and eggs. Its fur 

 will lie smoothly in any 

 direction. 



The Weasel, at the 

 north, during, summer, 

 is reddish-brown above and white beneath. It changes from 

 brown to white in October and November, and back again in 



Fig.li9. 



MustUa pennaniii, Fisher. 



MustUa americclna, Marten or Sable, i. 



March, except the extremity of the tail, which is always 

 black. At the south, the same species does not vary its fur. 



