96 



THE DEER OF AMERICA. 



minal black switch, whereas on the mountahi or more eastern 

 variety no such colored line is found, but all is white quite down 

 to the persistent black hairs of the terminal tuft. This tuft is 

 present alike on both varieties, and so on both is the underside of 

 the tail naked, a peculiarity found on no other species of deer. 

 The enormous metatarsal gland peculiar to tliis species is found 

 alike on both varieties. Altogether there is a greater difference 

 between these two varieties of a clearly identical species, than I 

 have observed in any other species of this family in the wild 

 state. 



Black-tailed Deer. 



