236 



STUDIES IN THE EVOLUTION OF ANIMALS 



hocks. In all cases they are of a different colour from the sur- 

 rounding hair. Fig. 85 gives an outline of their legs. But the 

 most interesting of all is the male Reindeer of the Natural History 



FIG. 86. The Llama, from a photograph, F. G. O. S., 20040. 



Museum. On the inner aspect of its hock it has a large whitish 

 patch of hair on a dark ground. 



There can be little doubt, I think, that these singular tufts of 

 elongated or modified hair are, as Sir W. Flower suggests, vestiges 



