CLASS MAMMALIA. 



247 



secure a firm footing on the ice, the soles of the feet are 

 thickly covered with long hairs. It passes the winter 

 months without hibernating. 



The Weasels are greatly diversified in size, habits, 

 color, etc. The more typical have fine fur, short legs, 

 and slim, flexible bodies, which enable them to pursue 

 their prey through small openings. Nearly all have 

 glands secreting a disagreeable odor. Differences in 

 dentition and manner of walking afford a means of tab- 

 ulation. 



AQUATIC ..Teeth = 36. Otto-. 



TERRESTRIAL. 



Semi-cligitigrade. 



Teeth = 31. 

 Teeth = 31. 

 Teeth = 38. 

 Teeth = 31. 



I Teeth = 34. 



. Digitigrade \ Teeth = 38. 



[ Teeth = 38. 



FIG. 430. 



Skunk. 

 Badger. 

 Wolverine. 

 Mink. 



Weasel. 

 Fisher. 

 Sable. 



Lu'tra can a den' sis. Otter. ( r V.) 



The River-otter has but one species in North America, 

 though it ranges from Hudson's Bay to the Gulf of Mex- 



