154 APPENDIX. 
entirely normal proportions, the final result of evolution 
being wonderfully illustrated in the enormous hind feet 
of the gray kangaroo! 
Or consider the family of the antelopes, closely allied 
to the horse. The antelope varies in size from that of a 
small rabbit to that of an ox. If there were known only 
fossil specimens, the evolutionist would undoubtedly iook 
upon the series as proof of development from the pigmy 
antelope of Guinea to the African water-buck and gnu. 
The antelopes differ widely in color and marking, in the 
size, shape, and angle of their horns, in length of tail, 
shape of teeth, of eyes, of nostrils, and in many other 
ways less evident. Some have larger hoofs, some small, 
some have an extra set of lateral hoofs, some have ex- 
ceedingly long limbs, in others the fore legs are peculiarly 
modified. Yet it is very clear that the great staglike 
creature, the African water-buck, is not the descendant 
of the royal antelope, which is only a few inches high, 
as little as the gray and red kangaroos are the descen- 
dants of the kangaroo-rat. 
Another animal which shows remarkable divergence 
of size and structure is the ant-eater of South America. 
The typical and largest representative of the group is an 
animal measuring four feet in length without the tail. 
Another species is much smaller and lives mainly in 
trees, while the great ant-eater is terrestrial in habits. 
Then there is the little, or two-toed, ant-eater, also a tree- 
dweller, and about the size of a rat. Now, these three 
species, so different in size and habits, exist to-day in 
various parts of South and Central America. If they 
existed only in fossil form, does any one question whether 
our evolutionists would resist the temptation to point out 
these various related forms as evidence of the evolution 
of the ant-eater from the little, two-toed species to the 
great ant-bear with its enormous development in struc- 
