358 STUDIES IN THE EVOLUTION OF ANIMALS 



No. 13. Burchell's Zebra and Chapman's Zebra have their tails ringed 

 half-way. 



Then if we turn again to Gould's Australian Mammals we find that : 



No. 14. Belidens scurus has vestiges of rings on its tail. Petrogale 

 xanthopus (yellow-footed rock Wallaby) is banded on the neck and has rings 

 on its tail. 



No. 15. Cam's dingo has three faint rings on its tail. 



N. B. These lists should not be considered as giving in any way all 

 the animals that exist under those headings, nor are they meant for a scientific 

 classification of the animals contained in them. 



They are only intended to show the general reader the large number of 

 mammals that are either spotted or striped, or are simply ring-tailed, which 

 feature I consider a vestige of either spotted or striped ancestry. In these lists 

 I have left out all domestic mammals, which are known to every one. 



The probability is that even those mammals which are wholly plain at all 

 ages, judging from domestic animals, descended from marked ancestors also, 

 but from some cause they entirely lost their marks at an early period, and now 

 the nervous system has lost the habit of reproducing them. 



